用户头像的设置(详细讲解)

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
/**
 *  从手机选择
 *
 */
[alertController addAction:[UIAlertAction actionWithTitle:@"从手机选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
    NSLog(@"从手机选择");
    //从现有的照片库选择图片, 选择范围仅限最近的相册
    //UIImagePickerControllerSourceTypePhotoLiabrary 从现有的照片库中取出图片
    //UIImagePickerControllerSourceTypePhotoLibrary 从现有的照片库选择图片, 选择范围仅限最近的相册
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
    {
        UIImagePickerController *pickerCon = [[UIImagePickerController alloc] init];
        pickerCon.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        pickerCon.allowsEditing = YES;
        pickerCon.delegate = self;
        [self presentViewController:pickerCon animated:YES completion:nil];
    } else
    {
       UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"温馨提示" message:@"您的手机没有照相机" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
       [alert show];
       [alert release];
    }
}]];
/**
 *  拍照
 *
 */
[alertController addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
    NSLog(@"拍照");
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        UIImagePickerController *pickerCon = [[UIImagePickerController alloc] init];
        pickerCon.sourceType = UIImagePickerControllerSourceTypeCamera;
        pickerCon.allowsEditing = YES;
        pickerCon.delegate = self;
        pickerCon.videoQuality = UIImagePickerControllerQualityTypeMedium;
        [self presentViewController:pickerCon animated:YES completion:nil];
    } else
    {
         UIAlertController *alertController1 = [UIAlertController alertControllerWithTitle:@"温馨提示" message:@"您的手机没有照相机" preferredStyle:UIAlertControllerStyleAlert];
        [alertController1 addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            NSLog(@"返回");
        }]];
        [self presentViewController:alertController1 animated:YES completion:nil];
    }
}]];
/**
 *  取消
 *
 */
[alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
    NSLog(@"取消");
}]];
[self presentViewController:alertController animated:YES completion:nil];

//UIImagePickerControllerOriginalImage 原始图片
//UIImagePickerControllerEditedImage 编辑过的图片
UIImage *image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];
[picker dismissViewControllerAnimated:YES completion:^{
    [_dianji setBackgroundImage:image forState:UIControlStateNormal];
   }];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
   [picker dismissViewControllerAnimated:YES completion:NULL];
}

NSURL *imageURL = [info valueForKey:@"UIImagePickerControllerReferenceURL"];

/*
NSURL *imageURL = [info valueForKey:@"UIImagePickerControllerReferenceURL"];
NSCharacterSet* delimiterSet = [NSCharacterSet characterSetWithCharactersInString:@"&;"];
NSMutableDictionary* pairs = [NSMutableDictionary dictionary];
NSScanner* scanner = [[NSScanner alloc] initWithString:[imageURL query]];
while (![scanner isAtEnd]) {
    NSString* pairString = nil;
    [scanner scanUpToCharactersFromSet:delimiterSet intoString:&pairString];
    [scanner scanCharactersFromSet:delimiterSet intoString:NULL];
    NSArray* kvPair = [pairString componentsSeparatedByString:@"="];
    if (kvPair.count == 2) {
        NSString* key = [[kvPair objectAtIndex:0]
                         stringByReplacingPercentEscapesUsingEncoding:@"UTF-8"];
        NSString* value = [[kvPair objectAtIndex:1]
                           stringByReplacingPercentEscapesUsingEncoding:@"UTF-8"];
        [pairs setObject:value forKey:key];
    }
}
self.imgExt = [pairs objectForKey:@"ext"];
if (self.imgExt == nil || self.imgExt.length < 1) {
    self.imgExt = @"jpg";
}
self.myICO = [self imageWithImageSimple:image scaledToSize:CGSizeMake(440.0, 330.0)];
[self.iconBtn setImage:self.myICO forState:UIControlStateNormal];
[self upImage:@"头像上传中。。。。" upType:5];
 */

import <MobileCoreServices/UTCoreTypes.h>
 #import <AssetsLibrary/ALAsset.h>