26.两种跳转展示
- 1.中间展示(两种写法)
//第一种方法 1.挂代理<UIActionSheetDelegate> 2.在点击的地方调用 UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"全国统一客服热线4007-114-115" message:nil delegate:self cancelButtonTitle:@"拨打" otherButtonTitles:@"取消", nil]; [alertView show]; 3.方法调用 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { if (buttonIndex == 0) { NSLog(@"拨打"); }else if (buttonIndex == 1) { NSLog(@"取消"); } } //第二种方法(方法里面直接调用:不用挂代理) UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"全国统一客服热线4007-114-115" message:nil preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"拨打" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog(@"拨打"); }]; UIAlertAction *alertAction2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog(@"取消"); }]; [alertController addAction:alertAction]; [alertController addAction:alertAction2]; [self presentViewController:alertController animated:YES completion:nil];
- 2.下面展示
//第一种方法 1.第一种挂代理<UIActionSheetDelegate> 2.在点击的地方调用 UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"从手机选择", @"拍照", nil]; sheet.actionSheetStyle = UIBarStyleDefault; [sheet showInView:self.view]; 3.方法调用 -(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { if (buttonIndex == 0) { NSLog(@"我是从手机选择"); }else if (buttonIndex == 1) { NSLog(@"我是拍照"); } } //第二种方法(方法里面直接调用:不用挂代理) UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet]; UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"从手机选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog(@"从手机选择"); }]; UIAlertAction *alertAction1 = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog(@"拍照"); }]; UIAlertAction *alertAction2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) { NSLog(@"取消"); }]; [alertController addAction:alertAction]; [alertController addAction:alertAction1]; [alertController addAction:alertAction2]; [self presentViewController:alertController animated:YES completion:nil];
27.对控件边框的处理(如宽度,颜色)
对象(button,label...).layer.borderColor = [[UIColor blackColor] CGColor]; 对象(button,label...).layer.borderWidth = 2.0f;
28.自定义导航栏标题
UILabel *titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 44)]; titleLabel.text = @"登陆"; titleLabel.textAlignment = NSTextAlignmentCenter; titleLabel.textColor = [UIColor blackColor]; titleLabel.font = [UIFont systemFontOfSize:15]; self.navigationItem.titleView = titleLabel;
29.静态变量的含义
static 表示只在此文件里可以访问(防止其他文件访问) const防止别人去改
static NSString *const ID = @"cellID";
30.懒加载的一些知识点
懒加载里面都是用_,但是在外面使用都要用self. 这样才能保证数据的存在性
31.切换UICollectionViewFolowLayout
CwLineLayout 是自定义的layout
if ([self.collectionView.collectionViewLayout isKindOfClass:[CwLineLayout class]]) { [self.collectionView setCollectionViewLayout:[[UICollectionViewFlowLayout alloc]init] animated:YES]; }else { [self.collectionView setCollectionViewLayout:[[CwLineLayout alloc]init] animated:YES]; }
31.删除指定item
/** * collectionView的点击事件 */ -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { //删除模型数据(删除的指定item) [self.imageArray removeObjectAtIndex:indexPath.item]; //刷新UI(这种方式比全局的好很多) [collectionView deleteItemsAtIndexPaths:@[indexPath]]; }
32.textField.returnKeyType = UIReturnKeySend;
typedef NS_ENUM(NSInteger, UIReturnKeyType) {
UIReturnKeyDefault, UIReturnKeyGo,//去往 UIReturnKeyGoogle, UIReturnKeyJoin,//加入 UIReturnKeyNext,//下一步 UIReturnKeyRoute, UIReturnKeySearch,//搜索 UIReturnKeySend,//发送 UIReturnKeyYahoo, UIReturnKeyDone,//完成 UIReturnKeyEmergencyCall, UIReturnKeyContinue NS_ENUM_AVAILABLE_IOS(9_0), };
33.下一个tabBar隐藏
testViewController.hidesBottomBarWhenPushed = YES;
34. 判断手机号码格式是否正确，利用正则表达式验证
+ (BOOL)isMobileNumber:(NSString *)mobileNum { if (mobileNum.length != 11) { return NO; } /** * 手机号码: * 13[0-9], 14[5,7], 15[0, 1, 2, 3, 5, 6, 7, 8, 9], 17[6, 7, 8], 18[0-9], 170[0-9] * 移动号段: 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 * 联通号段: 130,131,132,155,156,185,186,145,176,1709 * 电信号段: 133,153,180,181,189,177,1700 */ NSString *MOBILE = @"^1(3[0-9]|4[57]|5[0-35-9]|8[0-9]|70)\d{8}$"; /** * 中国移动：China Mobile * 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 */ NSString *CM = @"(^1(3[4-9]|4[7]|5[0-27-9]|7[8]|8[2-478])\d{8}$)|(^1705\d{7}$)"; /** * 中国联通：China Unicom * 130,131,132,155,156,185,186,145,176,1709 */ NSString *CU = @"(^1(3[0-2]|4[5]|5[56]|7[6]|8[56])\d{8}$)|(^1709\d{7}$)"; /** * 中国电信：China Telecom * 133,153,180,181,189,177,1700 */ NSString *CT = @"(^1(33|53|77|8[019])\d{8}$)|(^1700\d{7}$)"; NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE]; NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM]; NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU]; NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT]; if (([regextestmobile evaluateWithObject:mobileNum] == YES) || ([regextestcm evaluateWithObject:mobileNum] == YES) || ([regextestct evaluateWithObject:mobileNum] == YES) || ([regextestcu evaluateWithObject:mobileNum] == YES)) { return YES; } else { return NO; } }
35. 判断邮箱格式是否正确，利用正则表达式验证
+ (BOOL)isAvailableEmail:(NSString *)email { NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:email]; }
36. 判断字符串中是否含有空格
+ (BOOL)isHaveSpaceInString:(NSString *)string { NSRange _range = [string rangeOfString:@" "]; if (_range.location != NSNotFound) { return YES; }else { return NO; } }
37. 判断字符串中是否含有中文
+ (BOOL)isHaveChineseInString:(NSString *)string { for(NSInteger i = 0; i < [string length]; i++) { int a = [string characterAtIndex:i]; if (a > 0x4e00 && a < 0x9fff) { return YES; } } return NO; }
38. 判断字符串是否全部为数字
+ (BOOL)isAllNum:(NSString *)string { unichar c; for (int i=0; i<string.length; i++) { c="[string characterAtIndex:i];" if (!isdigit(c)) {="" return no;="" }="" }="" return yes;="" }<="" pre=""><p>判断是否是纯数字</p><pre class="brush:js;toolbar:false">+ (BOOL)isPureInteger:(NSString *)str { NSScanner *scanner = [NSScanner scannerWithString:str]; NSInteger val; return [scanner scanInteger:&val] && [scanner isAtEnd]; }
39. 过滤一些特殊字符 似乎只能去除头尾的特殊字符(不准)
+ (NSString *)filterSpecialWithString:(NSString *)string { // 定义一个特殊字符的集合 NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString: @ "@／：；: ;（）?「」＂、[]{}#%-*+=_|~＜＞$?^?'@#$%^&*()_+'"]; // 过滤字符串的特殊字符 NSString *newString = [string stringByTrimmingCharactersInSet:set]; return newString; }
40. 让iOS应用直接退出
+ (void)backOutApp { UIWindow *window = [[UIApplication sharedApplication].delegate window]; [UIView animateWithDuration:1.0f animations:^{ window.alpha = 0; } completion:^(BOOL finished) { exit(0); }]; }
41 NSArray 快速求总和、最大值、最小值、平均值
+ (NSString *)caculateArray:(NSArray *)array { CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] floatValue]; CGFloat avg = [[array valueForKeyPath:@"@avg.floatValue"] floatValue]; CGFloat max =[[array valueForKeyPath:@"@max.floatValue"] floatValue]; CGFloat min =[[array valueForKeyPath:@"@min.floatValue"] floatValue]; NSLog(@"%fn%fn%fn%f",sum,avg,max,min); return [NSString stringWithFormat:@"%f",sum]; }
42.生成八位随机字符串(一般是RSA加密或者DES加密使用)
- (NSString *)shuffledAlphabet { NSString *alphabet = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ"; // Get the characters into a C array for efficient shuffling NSUInteger numberOfCharacters = [alphabet length]; unichar *characters = calloc(numberOfCharacters, sizeof(unichar)); [alphabet getCharacters:characters range:NSMakeRange(0, numberOfCharacters)]; // Perform a Fisher-Yates shuffle for (NSUInteger i = 0; i < numberOfCharacters; ++i) { NSUInteger j = (arc4random_uniform((float)numberOfCharacters - i) + i); unichar c = characters[i]; characters[i] = characters[j]; characters[j] = c; } // Turn the result back into a string NSString *result = [NSString stringWithCharacters:characters length:8]; free(characters); return result; }
43.判断是真机还是模拟器
#if TARGET_OS_IPHONE //iPhone Device #endif #if TARGET_IPHONE_SIMULATOR //iPhone Simulator #endif
44.GCD 的宏定义
很多小伙伴都非常烦写GCD的方法，所以在此定义为宏使用更加方便简洁！如下图
//GCD - 一次性执行 #define kDISPATCH_ONCE_BLOCK(onceBlock) static dispatch_once_t onceToken; dispatch_once(&onceToken, onceBlock); //GCD - 在Main线程上运行 #define kDISPATCH_MAIN_THREAD(mainQueueBlock) dispatch_async(dispatch_get_main_queue(), mainQueueBlock); //GCD - 开启异步线程 #define kDISPATCH_GLOBAL_QUEUE_DEFAULT(globalQueueBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), globalQueueBlocl);
45.判断当前的iPhone设备/系统版本
//判断是否为iPhone #define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) //判断是否为iPad #define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) //判断是否为ipod #define IS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"]) // 判断是否为 iPhone 5SE #define iPhone5SE [[UIScreen mainScreen] bounds].size.width == 320.0f && [[UIScreen mainScreen] bounds].size.height == 568.0f // 判断是否为iPhone 6/6s #define iPhone6_6s [[UIScreen mainScreen] bounds].size.width == 375.0f && [[UIScreen mainScreen] bounds].size.height == 667.0f // 判断是否为iPhone 6Plus/6sPlus #define iPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width == 414.0f && [[UIScreen mainScreen] bounds].size.height == 736.0f //获取系统版本 #define IOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue] //判断 iOS 8 或更高的系统版本 #define IOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))
46.获取当前语言
#define LRCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
47.“Info.plist”中将要使用的URL Schemes列为白名单
当你的应用在iOS 9中需要使用 QQ/QQ空间/支付宝/微信SDK 的相关能力（分享、收藏、支付、登录等）时，需要在“Info.plist”里增加如下代码：
<key>LSApplicationQueriesSchemes</key> <array> <!-- 微信 URL Scheme 白名单--> <string>wechat</string> <string>weixin</string> <!-- 新浪微博 URL Scheme 白名单--> <string>sinaweibohd</string> <string>sinaweibo</string> <string>sinaweibosso</string> <string>weibosdk</string> <string>weibosdk2.5</string> <!-- QQ、Qzone URL Scheme 白名单--> <string>mqqapi</string> <string>mqq</string> <string>mqqOpensdkSSoLogin</string> <string>mqqconnect</string> <string>mqqopensdkdataline</string> <string>mqqopensdkgrouptribeshare</string> <string>mqqopensdkfriend</string> <string>mqqopensdkapi</string> <string>mqqopensdkapiV2</string> <string>mqqopensdkapiV3</string> <string>mqzoneopensdk</string> <string>wtloginmqq</string> <string>wtloginmqq2</string> <string>mqqwpa</string> <string>mqzone</string> <string>mqzonev2</string> <string>mqzoneshare</string> <string>wtloginqzone</string> <string>mqzonewx</string> <string>mqzoneopensdkapiV2</string> <string>mqzoneopensdkapi19</string> <string>mqzoneopensdkapi</string> <string>mqzoneopensdk</string> <!-- 支付宝 URL Scheme 白名单--> <string>alipay</string> <string>alipayshare</string> </array>
48.将秒转化为时间字符串
秒数 float currentPlayTime = 64; //将秒转化为时间字符串 NSString *currentTimeStr = [self convertDuraion:currentPlayTime]; - (NSString *)convertDuraion:(float)duraion{ NSDate *date = [NSDate dateWithTimeIntervalSince1970:duraion]; NSDateFormatter *dateFormate = [[NSDateFormatter alloc]init]; dateFormate.dateFormat = @"mm:ss"; return [dateFormate stringFromDate:date]; }
49.有关字符串
NSString *string1 = @"0123456789"; NSRange range1 = NSMakeRange(1, 4);//NSMakeRange这个函数的作用是从第0位开始计算，长度为4 NSLog(@"从第1个字符开始，长度为4的字符串是：%@",[string1 substringWithRange:range1]); NSLog(@"抽取从头开始到第4个字符：%@",[string1 substringToIndex:4]); NSLog(@"抽取从第6个字符开始到末尾：%@",[string1 substringFromIndex:6]); NSString *string2 = @"wo shi xiao bai zhu"; NSRange range2 = [string2 rangeOfString:@"bai"]; if (range2.length > 0) { NSLog(@"{字符串中“bai”的位置,长度}==%@",NSStringFromRange(range2)); } //判断在一串字符串中是否找到某个字符串 NSRange range3 = [string2 rangeOfString:@"zhu"]; if (range3.location != NSNotFound) { NSLog(@"找到了@“zhu”这个字符串！"); } else { NSLog(@"没找到！"); }
50.交换两个值(异或)
51.角度转弧度
宏定义: #define angle2radion(angle) ((angle) / 180.0 * M_PI)
52.获取当前的系统时间(以日历表为例)
//获取当前日历对象 NSCalendar *calendar =[NSCalendar currentCalendar]; //获取日期的组件,年月日,时分秒 //components: 需要获取日期组件 //formDate:获取哪个日期组件 //经验:以后枚举中有移位运算符(<<),一般来说我们就可以用 | :"并" 的方式 NSDateComponents *dateComponents = [calendar components:NSCalendarUnitSecond | NSCalendarUnitMinute | NSCalendarUnitHour | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate:[NSDate date]]; NSLog(@"小时==%ld",dateComponents.hour); NSLog(@"分钟==%ld",dateComponents.minute); NSLog(@"秒==%ld",dateComponents.second);
53.点转化为对象
[NSValue valueWithCGPoint:CGPointMake(arc4random_uniform(500), arc4random_uniform(500))];
54.隐藏tabBar
控制器对象.hidesBottomBarWhenPushed = YES;(比较好)
55.刷新指定section或者row
//一个section刷新 NSIndexSet *indexSet=[[NSIndexSet alloc]initWithIndex:indexPath.section]; [_tableView reloadSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic]; //一个cell刷新 NSIndexPath *indexPath1=[NSIndexPath indexPathForRow:3 inSection:0]; [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath1,nil] withRowAnimation:UITableViewRowAnimationNone];
56. 遍历字典
NSDictionary *dict = [NSDictionary new]; [dict enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) { // key 是键 // obj 是值 }];
57. NSTimer定时器
创建定时器 NSTimer * timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(click1) userInfo:nil repeats:YES]; 暂停 [timer setFireDate:[NSDate distantFuture]]; 继续 [timer setFireDate:[NSDate date]]; 关闭定时器 [timer invalidate];
58.两张图片的合成
/** * 3.将两个图片合成 */ dispatch_group_notify(group, queue, ^{ /** * 开启新的图形上下文 */ UIGraphicsBeginImageContext(CGSizeMake(200, 200)); //绘制图片 [self.image1 drawInRect:CGRectMake(0, 0, 200, 100)]; //绘制图片 [self.image2 drawInRect:CGRectMake(0, 100, 200, 100)]; /** * 取得上下文里面的图片 */ UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); /** * 结束上下文 */ UIGraphicsEndImageContext(); /** * 4.进入主队列加载合成的图片 */ dispatch_async(dispatch_get_main_queue(), ^{ self.imageView.image = image; });
59沙盒路径
//获取整个程序所在目录 NSString *homePath=NSHomeDirectory(); NSLog(@"%@",homePath); //获取.app文件目录 NSString *appPath=[[NSBundle mainBundle]bundlePath]; NSLog(@"%@",appPath); //Documents目录 NSArray *arr1=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSLog(@"%@",[arr1 objectAtIndex:0]); //Library目录 NSArray *arr2=NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSLog(@"%@",[arr2 objectAtIndex:0]); //Caches目录，在Library下面 NSArray *arr3=NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSLog(@"%@",[arr3 objectAtIndex:0]); //tmp目录 NSString *tmpPath=NSTemporaryDirectory(); NSLog(@"%@",tmpPath); //用整个程序目录加上tmp就拼凑出tmp目录，其他目录都可这样完成 NSString *tmpPath_1=[homePath stringByAppendingPathComponent:@"tmp"]; NSLog(@"%@",tmpPath_1);
60.几个常用的正则表达式
//邮箱 + (BOOL) validateEmail:(NSString *)email { NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:email]; } //手机号码验证 + (BOOL) validateMobile:(NSString *)mobile { //手机号以13， 15，18开头，八个 \d 数字字符 NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$"; NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex]; return [phoneTest evaluateWithObject:mobile]; } //车牌号验证 + (BOOL) validateCarNo:(NSString *)carNo { NSString *carRegex = @"^[\u4e00-\u9fa5]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_\u4e00-\u9fa5]$"; NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex]; NSLog(@"carTest is %@",carTest); return [carTest evaluateWithObject:carNo]; } //车型 + (BOOL) validateCarType:(NSString *)CarType { NSString *CarTypeRegex = @"^[\u4E00-\u9FFF]+$"; NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CarTypeRegex]; return [carTest evaluateWithObject:CarType]; } //用户名 + (BOOL) validateUserName:(NSString *)name { NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$"; NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]; BOOL B = [userNamePredicate evaluateWithObject:name]; return B; } //密码 + (BOOL) validatePassword:(NSString *)passWord { NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex]; return [passWordPredicate evaluateWithObject:passWord]; } //以下验证不计算长度 //1、验证字符串 - (BOOL)validateNickname:(NSString *)nickname { // 不包含特殊字符 // 特殊字符包含`、-、=、\、[、]、;、'、,、.、/、~、!、@、#、$、%、^、&、*、(、)、_、+、|、?、>、<、"、:、{、} NSString *nicknameRegex = @".*[-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]+.*"; NSPredicate *nicknamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", nicknameRegex]; return ![nicknamePredicate evaluateWithObject:nickname]; } //2、验证密码 - (BOOL)validatePassword:(NSString *)password { // 特殊字符包含`、-、=、\、[、]、;、'、,、.、/、~、!、@、#、$、%、^、&、*、(、)、_、+、|、?、>、<、"、:、{、} // 必须包含数字和字母，可以包含上述特殊字符。 // 依次为（如果包含特殊字符） // 数字 字母 特殊 // 字母 数字 特殊 // 数字 特殊 字母 // 字母 特殊 数字 // 特殊 数字 字母 // 特殊 字母 数字 NSString *passWordRegex = @"(\\d+[a-zA-Z]+[-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*)|([a-zA-Z]+\\d+[-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*)|(\\d+[-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*[a-zA-Z]+)|([a-zA-Z]+[-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*\\d+)|([-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*\\d+[a-zA-Z]+)|([-`=\\\[\\];',./~!@#$%^&*()_+|{}:\"<>?]*[a-zA-Z]+\\d+)"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", passWordRegex]; return [passWordPredicate evaluateWithObject:password]; } //昵称 + (BOOL) validateNickname:(NSString *)nickname { NSString *nicknameRegex = @"^[\u4e00-\u9fa5]{4,8}$"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex]; return [passWordPredicate evaluateWithObject:nickname]; } //身份证号 + (BOOL) validateIdentityCard: (NSString *)identityCard { BOOL flag; if (identityCard.length <= 0) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{14}|\\d{17})(\\d|[xX])$"; NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [identityCardPredicate evaluateWithObject:identityCard]; }
61.打印方式
NSLog(@"控制器名字=%s 第%d行",__PRETTY_FUNCTION__, __LINE__);
62.控制屏幕旋转，在控制器中写
/** 是否支持自动转屏 */ - (BOOL)shouldAutorotate { return YES; } /** 支持哪些屏幕方向 */ - (UIInterfaceOrientationMask)supportedInterfaceOrientations { return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight; } /** 默认的屏幕方向（当前ViewController必须是通过模态出来的UIViewController（模态带导航的无效）方式展现出来的，才会调用这个方法） */ - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation { return UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight; }
63.几个常用权限判断
if ([CLLocationManager authorizationStatus] ==kCLAuthorizationStatusDenied) { NSLog(@"没有定位权限"); } AVAuthorizationStatus statusVideo = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if (statusVideo == AVAuthorizationStatusDenied) { NSLog(@"没有摄像头权限"); } //是否有麦克风权限 AVAuthorizationStatus statusAudio = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio]; if (statusAudio == AVAuthorizationStatusDenied) { NSLog(@"没有录音权限"); } [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) { if (status == PHAuthorizationStatusDenied) { NSLog(@"没有相册权限"); } }];
64.获取手机和app信息
NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary]; CFShow(infoDictionary); // app名称 NSString *app_Name = [infoDictionary objectForKey:@"CFBundleDisplayName"]; // app版本 NSString *app_Version = [infoDictionary objectForKey:@"CFBundleShortVersionString"]; // app build版本 NSString *app_build = [infoDictionary objectForKey:@"CFBundleVersion"]; //手机序列号 NSString* identifierNumber = [[UIDevice currentDevice] uniqueIdentifier]; NSLog(@"手机序列号: %@",identifierNumber); //手机别名： 用户定义的名称 NSString* userPhoneName = [[UIDevice currentDevice] name]; NSLog(@"手机别名: %@", userPhoneName); //设备名称 NSString* deviceName = [[UIDevice currentDevice] systemName]; NSLog(@"设备名称: %@",deviceName ); //手机系统版本 NSString* phoneVersion = [[UIDevice currentDevice] systemVersion]; NSLog(@"手机系统版本: %@", phoneVersion); //手机型号 NSString* phoneModel = [[UIDevice currentDevice] model]; NSLog(@"手机型号: %@",phoneModel ); //地方型号 （国际化区域名称） NSString* localPhoneModel = [[UIDevice currentDevice] localizedModel]; NSLog(@"国际化区域名称: %@",localPhoneModel ); NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary]; // 当前应用名称 NSString *appCurName = [infoDictionary objectForKey:@"CFBundleDisplayName"]; NSLog(@"当前应用名称：%@",appCurName); // 当前应用软件版本 比如：1.0.1 NSString *appCurVersion = [infoDictionary objectForKey:@"CFBundleShortVersionString"]; NSLog(@"当前应用软件版本:%@",appCurVersion); // 当前应用版本号码 int类型 NSString *appCurVersionNum = [infoDictionary objectForKey:@"CFBundleVersion"]; NSLog(@"当前应用版本号码：%@",appCurVersionNum);
65.移除字符串中的空格和换行
+ (NSString *)removeSpaceAndNewline:(NSString *)str { NSString *temp = [str stringByReplacingOccurrencesOfString:@" " withString:@""]; temp = [temp stringByReplacingOccurrencesOfString:@"\r" withString:@""]; temp = [temp stringByReplacingOccurrencesOfString:@"\n" withString:@""]; return temp; }
66.判断字符串中是否有空格
+ (BOOL)isBlank:(NSString *)str { NSRange _range = [str rangeOfString:@" "]; if (_range.location != NSNotFound) { //有空格 return YES; } else { //没有空格 return NO; } }
67.获取一个视频的第一帧图片
NSURL *url = [NSURL URLWithString:filepath]; AVURLAsset *asset1 = [[AVURLAsset alloc] initWithURL:url options:nil]; AVAssetImageGenerator *generate1 = [[AVAssetImageGenerator alloc] initWithAsset:asset1]; generate1.appliesPreferredTrackTransform = YES; NSError *err = NULL; CMTime time = CMTimeMake(1, 2); CGImageRef oneRef = [generate1 copyCGImageAtTime:time actualTime:NULL error:&err]; UIImage *one = [[UIImage alloc] initWithCGImage:oneRef]; return one;
68.获取视频的时长
+ (NSInteger)getVideoTimeByUrlString:(NSString *)urlString { NSURL *videoUrl = [NSURL URLWithString:urlString]; AVURLAsset *avUrl = [AVURLAsset assetWithURL:videoUrl]; CMTime time = [avUrl duration]; int seconds = ceil(time.value/time.timescale); return seconds; }
69.isKindOfClass和isMemberOfClass的区别
isKindOfClass可以判断某个对象是否属于某个类，或者这个类的子类。 isMemberOfClass更加精准，它只能判断这个对象类型是否为这个类(不能判断子类)
70.将tableView滚动到顶部
[tableView setContentOffset:CGPointZero animated:YES]; 或者 [tableView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
71.UILabel设置内边距
子类化UILabel，重写drawTextInRect方法 - (void)drawTextInRect:(CGRect)rect { // 边距，上左下右 UIEdgeInsets insets = {0, 5, 0, 5}; [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)]; }
72.UILabel设置文字描边
子类化UILabel，重写drawTextInRect方法 - (void)drawTextInRect:(CGRect)rect { CGContextRef c = UIGraphicsGetCurrentContext(); // 设置描边宽度 CGContextSetLineWidth(c, 1); CGContextSetLineJoin(c, kCGLineJoinRound); CGContextSetTextDrawingMode(c, kCGTextStroke); // 描边颜色 self.textColor = [UIColor redColor]; [super drawTextInRect:rect]; // 文本颜色 self.textColor = [UIColor yellowColor]; CGContextSetTextDrawingMode(c, kCGTextFill); [super drawTextInRect:rect]; }
73.scrollView滚动到最下边
CGPoint bottomOffset = CGPointMake(0, scrollView.contentSize.height - scrollView.bounds.size.height); [scrollView setContentOffset:bottomOffset animated:YES];
74.UIView背景颜色渐变
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)]; [self.view addSubview:view]; CAGradientLayer *gradient = [CAGradientLayer layer]; gradient.frame = view.bounds; gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor blackColor] CGColor], (id)[[UIColor whiteColor] CGColor], nil]; [view.layer insertSublayer:gradient atIndex:0];
75.将一个view放置在其兄弟视图的最上面
[parentView bringSubviewToFront:yourView]
76.将一个view放置在其兄弟视图的最下面
[parentView sendSubviewToBack:yourView]
77.让手机震动一下
倒入框架 #import AudioServicesPlayAlertSound(kSystemSoundID_Vibrate); 或者 AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
78.layoutSubviews方法什么时候调用？
1、init方法不会调用 2、addSubview方法等时候会调用 3、bounds改变的时候调用 4、scrollView滚动的时候会调用scrollView的 layoutSubviews方法(所以不建议在scrollView的layoutSubviews方法中做复杂逻辑) 5、旋转设备的时候调用 6、子视图被移除的时候调用
79.让UILabel在指定的地方换行
// 换行符为\n,在需要换行的地方加上这个符号即可，如 label.numberOfLines = 0; label.text = @"此处\n换行";
80.摇一摇功能
1、打开摇一摇功能 [UIApplication sharedApplication].applicationSupportsShakeToEdit = YES; 2、让需要摇动的控制器成为第一响应者 [self becomeFirstResponder]; 3、实现以下方法 // 开始摇动 - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event // 取消摇动 - (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event // 摇动结束 - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
81.获取view的坐标在整个window上的位置
// v上的(0, 0)点在toView上的位置 CGPoint point = [v convertPoint:CGPointMake(0, 0) toView:[UIApplication sharedApplication].windows.lastObject]; 或者 CGPoint point = [v.superview convertPoint:v.frame.origin toView:[UIApplication sharedApplication].windows.lastObject];
82.提交App Store审核程序限制
您的应用程序的未压缩大小必须小于4GB。每个Mach-O可执行文件（例如app_name.app/app_name）不能超过这些限制： 对于MinimumOSVersion小于7.0的应用程序：TEXT二进制文件中所有部分的总数最多为80 MB 。 对于MinimumOSVersion7.x到8.x的应用程序：TEXT对于二进制文件中每个体系结构片段的每个片段，最大为60 MB 。 对于MinimumOSVersion9.0或更高版本的应用程序：__TEXT二进制文件中所有部分的总数最多为500 MB 。参阅：iTunes Connect开发者指南
83.修改UISegmentedControl的字体大小
[segment setTitleTextAttributes:@{NSFontAttributeName : [UIFont systemFontOfSize:15.0f]} forState:UIControlStateNormal];
84.在非ViewController的地方弹出UIAlertController对话框
// 最好抽成一个分类 UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"message" preferredStyle:UIAlertControllerStyleAlert]; id rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController; If([rootViewController isKindOfClass:[UINavigationController class]]) { rootViewController = ((UINavigationController *)rootViewController).viewControllers.firstObject; } if([rootViewController isKindOfClass:[UITabBarController class]]) { rootViewController = ((UITabBarController *)rootViewController).selectedViewController; } [rootViewController presentViewController:alertController animated:YES completion:nil];
85.获取一个view所属的控制器
// view分类方法 - (UIViewController *)belongViewController { for (UIView *next = [self superview]; next; next = next.superview) { UIResponder* nextResponder = [next nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) { return (UIViewController *)nextResponder; } } return nil; }
86.UIImage和base64互转
// view分类方法 - (NSString *)encodeToBase64String:(UIImage *)image { return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength]; } - (UIImage *)decodeBase64ToImage:(NSString *)strEncodeData { NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters]; return [UIImage imageWithData:data]; }
87.UIWebView设置背景透明
[webView setBackgroundColor:[UIColor clearColor]]; [webView setOpaque:NO];
88.判断NSDate是不是今天
NSDateComponents *otherDay = [[NSCalendar currentCalendar] components:NSCalendarUnitEra | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:aDate]; NSDateComponents *today = [[NSCalendar currentCalendar] components:NSCalendarUnitEra | NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:[NSDate date]]; if([today day] == [otherDay day] && [today month] == [otherDay month] &&[today year] == [otherDay year] && [today era] == [otherDay era]) { // 是今天 }
89.设置tableView分割线颜色
[self.tableView setSeparatorColor:[UIColor myColor]];
90.设置屏幕方向
[[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
91.UITextView中打开或禁用复制，剪切，选择，全选等功能
// 继承UITextView重写这个方法 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender { // 返回NO为禁用，YES为开启 // 粘贴 if (action == @selector(paste:)) return NO; // 剪切 if (action == @selector(cut:)) return NO; // 复制 if (action == @selector(copy:)) return NO; // 选择 if (action == @selector(select:)) return NO; // 选中全部 if (action == @selector(selectAll:)) return NO; // 删 if (action == @selector(delete:)) return NO; // 分享 if (action == @selector(share)) return NO; return [super canPerformAction:action withSender:sender]; }
92.屏幕截图
/** * @brief 屏幕截图 */ + (UIImage *)screenShotWithView:(UIView *)v; + (UIImage *)screenShotWithView:(UIView *)v; { UIGraphicsBeginImageContext(v.frame.size); [v.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img; }
93.获取视频的第一帧图片
-(UIImage *)videoUrl:(NSString *)url{ NSURL *urlString = [NSURL URLWithString:url]; AVURLAsset *asset1 = [[AVURLAsset alloc] initWithURL:urlString options:nil]; AVAssetImageGenerator *generate1 = [[AVAssetImageGenerator alloc] initWithAsset:asset1]; generate1.appliesPreferredTrackTransform = YES; NSError *err = NULL; CMTime time = CMTimeMake(1, 2); CGImageRef oneRef = [generate1 copyCGImageAtTime:time actualTime:NULL error:&err]; UIImage *oneImage = [[UIImage alloc] initWithCGImage:oneRef]; return oneImage; }
