解决UITableView在iOS7中UINavigationController里的顶部留白问题
出现问题时候的截图:
源码:
用到的类:
UIViewController+TitleTextAttributes.h 与 UIViewController+TitleTextAttributes.m
//
// UIViewController+TitleTextAttributes.h
// YouXianMing
//
// Created by YouXianMing on 14-9-20.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "NCTitleAttribute.h"
@interface UIViewController (TitleTextAttributes)
/**
* 设置当前控制器的标题属性
*
* @param attribute 属性对象
*/
- (void)titleTextAttributes:(NCTitleAttribute *)attribute;
@end//
// UIViewController+TitleTextAttributes.m
// YouXianMing
//
// Created by YouXianMing on 14-9-20.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import "UIViewController+TitleTextAttributes.h"
@implementation UIViewController (TitleTextAttributes)
#pragma mark - public
- (void)titleTextAttributes:(NCTitleAttribute *)attribute
{
[self controller:self
titleTextAttributes:[attribute transformToDictionary]];
}
#pragma mark - private
- (void)controller:(UIViewController *)controller titleTextAttributes:(NSDictionary *)dictionary
{
if ([controller isKindOfClass:[UIViewController class]]) {
[controller.navigationController.navigationBar setTitleTextAttributes:dictionary];
}
}
@endNCTitleAttribute.h 与 NCTitleAttribute.m
//
// NCTitleAttribute.h
// YouXianMing
//
// Created by YouXianMing on 14-9-20.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface NCTitleAttribute : NSObject
@property (nonatomic, strong) UIColor *titleColor; // 标题颜色
@property (nonatomic, strong) UIFont *titleFont; // 标题字体
@property (nonatomic, strong) UIColor *shadowColor; // 阴影颜色
@property (nonatomic, assign) CGSize shadowOffset; // 阴影偏移量
// 将参数转换为字典
- (NSDictionary *)transformToDictionary;
@end//
// NCTitleAttribute.m
// YouXianMing
//
// Created by YouXianMing on 14-9-20.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import "NCTitleAttribute.h"
@implementation NCTitleAttribute
- (NSDictionary *)transformToDictionary
{
NSMutableDictionary *dic = [NSMutableDictionary new];
if (_titleColor)
{
[dic setObject:_titleColor forKey:NSForegroundColorAttributeName];
}
else
{
[dic setObject:[UIColor blackColor] forKey:NSForegroundColorAttributeName];
}
if (_titleFont)
{
[dic setObject:_titleFont forKey:NSFontAttributeName];
}
if (_shadowOffset.height && _shadowOffset.width)
{
NSShadow *shadow = [NSShadow new];
shadow.shadowColor = _shadowColor;
shadow.shadowOffset = _shadowOffset;
[dic setObject:shadow forKey:NSShadowAttributeName];
}
return dic;
}
@end控制器源码:
//
// ViewController.m
// UIRectEdgeNone
//
// Created by YouXianMing on 14/10/29.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import "ViewController.h"
#import "UIViewController+TitleTextAttributes.h"
#import "NCTitleAttribute.h"
#import "WxHxD.h"
@interface ViewController ()<UITableViewDataSource, UITableViewDelegate>
@property (nonatomic, strong) UITableView *tableView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 初始化标题
[self initTitle];
// 背景view
UIView *backView = [[UIView alloc] initWithFrame:\
CGRectMake(0, [WxHxD statusBarAndNavigationBarHeight],
[WxHxD screenWidth],
[WxHxD screenHeight] - [WxHxD statusBarAndNavigationBarHeight])];
backView.layer.borderWidth = 2.f;
backView.layer.borderColor = [UIColor redColor].CGColor;
[self.view addSubview:backView];
// tableView
_tableView = [[UITableView alloc] initWithFrame:backView.bounds
style:UITableViewStylePlain];
_tableView.delegate = self;
_tableView.dataSource = self;
[backView addSubview:_tableView];
}
- (void)initTitle {
self.title = @"YouXianMing";
NCTitleAttribute *NCTitle = [NCTitleAttribute new];
NCTitle.titleColor = [UIColor redColor];
NCTitle.titleFont = [UIFont fontWithName:@"HelveticaNeue-Thin" size:24.f];
[self titleTextAttributes:NCTitle];
}
#pragma mark - 代理
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 7;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *reusedFlag = @"YouXianMing";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reusedFlag];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:reusedFlag];
}
cell.textLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:18.f];
cell.textLabel.text = @"No Zuo No Die";
cell.textLabel.textColor = [UIColor grayColor];
return cell;
}
@end如何解决呢?很简单:
添加以下代码:
// 让边缘留白为空
float systemVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
if (systemVersion >= 7.0) {
self.edgesForExtendedLayout = UIRectEdgeNone;
}
效果:
注意:此种问题只有在iOS7以上才会出现
