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- 来自专栏iOS 开发
IQKeyboardManager 启用/禁用
animated]; //TODO: 页面appear 禁用 [[IQKeyboardManager sharedManager] setEnable:NO]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; //TODO: 页面Disappear 启用 [[IQKeyboardManager //TODO: 页面appear 禁用 [[IQKeyboardManager sharedManager] setEnableAutoToolbar:NO]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; //TODO: 页面Disappear 启用 [[IQKeyboardManager :(BOOL)animated { [super viewWillDisappear:animated]; //TODO: 页面Disappear 启用 [IQKeyboardManager
3K20发布于 2018-06-05 - 来自专栏iOS开发攻城狮的集散地
iOS 多个category同时交换同一个方法
:(BOOL)animated{ [super viewWillDisappear:animated]; NSLog(@"viewWillDisappear_原生的"); } - (void :(BOOL)animated{ NSLog(@"viewWillDisappear_ExchangeMethod1"); [self wp_viewWillDisappear1:animated :(BOOL)animated{ NSLog(@"viewWillDisappear_ExchangeMethod2"); [self wp_viewWillDisappear2:animated 3.4 viewWillDisappear验证交换后方法不同名结果 控制台日志: viewWillDisappear_ExchangeMethod2 viewWillDisappear_ExchangeMethod1 viewWillDisappear_原生的 此日志说明:多个category同时交换同一个方法，交换后的方法名称不相同。
1.9K10发布于 2021-09-07 - 来自专栏DannyHoo的专栏
开发后期在各个页面中添加友盟统计
友盟统计中要求在每个页面的viewWillAppear和viewWillDisappear方法中添加友盟统计的方法： - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:YES]; [MobClick beginLogPageView:@"DiscoverController"]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:YES]; [MobClick endLogPageView:@"DiscoverController load类方法会在每个页面中被调用，在运行时，viewWillAppear 方法会被statisticsViewWillAppear替换，viewWillDisappear会被statisticsViewWillDisappear 替换，且每个页面的viewWillAppear、viewWillDisappear方法仍然有效。
2.2K20发布于 2018-09-13 - 来自专栏iOS 开发
导航栏的设置 背景 线
viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; self.navLine.hidden = YES; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; self.navLine.hidden = NO; } 二、设置导航栏背景图 UIBarMetricsDefault]; [self.navigationController.navigationBar setShadowImage:[UIImage new]]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; [self.navigationController.navigationBar
2.2K100发布于 2018-06-05 - 来自专栏進无尽的文章
UI篇－VC的生命周期以及UIView的layoutSubviews和drawRect方法
viewWillLayoutSubviews：控制器的view将要布局子控件 viewDidLayoutSubviews：控制器的view布局子控件完成 viewDidAppear:控制器的view完全显示 viewWillDisappear NSCoder *)aDecoder：ViewController2 (如果用xib创建的情况下） loadView：ViewController2 viewDidLoad：ViewController2 viewWillDisappear 一个VC 在执行viewWillDisappear 或者viewDidDisappear 方法时都是出栈之后才执行的，也就是说 已经不在 self.navigationController 的viewControllers 一个很常见的问题，我们需要在VC被销毁的时候处理一些事情，可是 viewWillDisappear 不管是入栈新的视图还是出栈当前视图都会被调用，无法判断，结合我之前说的原理，我们可以利用下面这个方法判断当前 - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:YES]; if ([[self.navigationController
2.4K30发布于 2018-09-12 - 来自专栏慎独
UIViewController生命周期分析
didReceiveMemoryWarning { [super didReceiveMemoryWarning]; NSLog(@"FirstVC didReceiveMemoryWarning"); } -(void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:YES]; NSLog(@"FirstVC viewWillDisappear"); } -(void SIMAlbum[35103:546098] SecondView viewDidLoad 2016-03-24 10:55:38.865 SIMAlbum[35103:546098] FirstVC viewWillDisappear SecondView viewDidAppear 返回第一个viewController 2016-03-24 10:56:48.577 SIMAlbum[35103:546098] SecondView viewWillDisappear SimDraw[36310:564381] FirstVC viewDidAppear 退出时 2016-03-24 11:10:20.636 SimDraw[36310:564381] FirstVC viewWillDisappear
1.1K40发布于 2018-06-01 - 来自专栏网罗开发
iOS 如何解决 NSTimer 循环引用
在 ViewController 执行 dealloc 前释放 timer（不推荐） ---- 可以在 viewWillAppear 中创建 timer 可以在 viewWillDisappear 中销毁 :(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidLoad { [super viewDidLoad category @property (nonatomic, strong) NSTimer *timer1; @end @implementation ViewController1 - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidLoad { [super viewDidLoad :(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidLoad { [super viewDidLoad
1.8K30发布于 2021-04-07 - 来自专栏非典型技术宅
ViewController及View的生命周期1. 起因2. Controller的生命周期3. View的生命周期4. 内存警告
Default does nothing //视图将要消失 - (void)viewWillDisappear:(BOOL)animated; // Called when the view is dismissed 2.3 viewWillDisappear Called when the view is dismissed, covered or otherwise hidden. 当触发侧滑返回时会调用系统自带的viewWillDisappear:方法。 iOS7新增加了导航控制器侧滑手势，当触发侧滑返回时，会调用系统的viewWillDisappear:方法，取消侧滑返回时又会调用viewWillAppear:方法。 isBeingDismissed 会在viewWillDisappear & viewDidDisappear 方法内部调用这个方法判断视图控制器的视图的隐藏是否因为视图控制器被清退 (dismissed
2.1K30发布于 2018-06-28 - 来自专栏小黑娃Henry
iOS 判断UIViewController是push/pop或模态化进入/退出
print("页面通过导航栏pop退回该页面 / 页面通过模态化dismiss退回该页面") } } UIViewController消失 override func viewWillDisappear (_ animated: Bool) { super.viewWillDisappear(animated) if isBeingDismissed |
2.1K30编辑于 2022-01-09 - 来自专栏Helloted
Runtime运用:埋点统计
viewDidAppear:), @selector(ht_viewDidAppear:)); monitor_exchangeInstanceMethod([self class], @selector(viewWillDisappear :), @selector(ht_viewWillDisappear:)); monitor_exchangeInstanceMethod([self class], @selector(viewDidDisappear Delegate:声明Delegate要用weak;当delegate指向的对象销毁后，delegate = nil;如果用assign，可以解决循环引用的问题，但是可能会出现野指针 - (void)ht_viewWillDisappear :(BOOL)animated{ [self ht_viewWillDisappear:animated]; if(self.isMovingFromParentViewController DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), self.ht_dellocBlock); } 在viewWillDisappear
1.3K20编辑于 2022-06-07 - 来自专栏iOS逆向与安全
IQKeyboardManager 导致TableView 界面上移的解决方案
界面整体上移问题 I、解决使UITableView 界面上移问题 解决方案1: 禁止键盘出现时的界面滚动 #pragma mark - ******** 禁止键盘出现时的界面滚动 - (void)viewWillDisappear :(BOOL)animated{ [super viewWillDisappear:animated]; [IQKeyboardManager sharedManager].enable
2.8K30发布于 2021-03-24 - 来自专栏月亮与二进制
iOS导航栏切换界面时隐藏和显示
但是如果同时还涉及到UITabbarController，就会有一些瑕疵，下面是要实现的效果，可以观察一下瑕疵在哪： 实现： 要实现这个简单的有无导航栏过渡其实很简单，直接在 viewWillAppear 和 viewWillDisappear animated]; [self.navigationController setNavigationBarHidden:YES animated:YES]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; [self.navigationController setNavigationBarHidden
5.8K30发布于 2021-11-23 - 来自专栏学海无涯
iOS17适配指南之UIViewController
super.viewDidAppear(animated) print(#function) } // MARK: view即将消失 override func viewWillDisappear (_ animated: Bool) { super.viewWillDisappear(animated) print(#function) } //
1.2K30编辑于 2023-07-09 - 来自专栏码农的生活
iOS晃动检测
viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated]; [self becomeFirstResponder]; } (void)viewWillDisappear :(BOOL)animated{ [self resignFirstResponder]; [super viewWillDisappear:animated]; } -(void)motionEnded
63430发布于 2021-10-29 - 来自专栏BY的专栏
iOS将单个控制器设为横屏、页面横屏
[[UIDevice currentDevice] setValue:value forKey:@"orientation"]; } // 离开时禁止旋转并将屏幕方向设为竖屏 -(void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; [self restrictRotation:NO]; NSNumber
3.3K50发布于 2018-05-11 - 来自专栏日常技术分享
ios ARC中如何判断一个对象释放了
addObject:_obj]; NSLog(@"hashTablele: %@", _hashTablele); } HashTable中判断该对象是否存在，如果不存在就被释放了 - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; self.obj = nil; if ([_hashTablele
2.9K20发布于 2018-09-13 - 来自专栏日常技术分享
极光偶尔收不到自定义消息解决办法
接下来的思路 - (void)viewWillAppear:(BOOL)animated{ // 注册极光Tag } - (void)viewWillDisappear:(BOOL)animated 原因：viewWillAppear注册Tag，viewWillDisappear删除，但是测试来回在push和pop同一个页面。就频繁注册Tag就会报6021的错误。
1.7K20发布于 2019-07-09 - 来自专栏Alice
03_iOS导航栏的正确隐藏方式
animated]; [self.navigationController setNavigationBarHidden:YES animated:animated]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; [self.navigationController setNavigationBarHidden
1.9K20发布于 2020-12-16 - 来自专栏浅探ARKit
ARKit同时检测水平平面和竖直平面
configuration options:ARSessionRunOptionResetTracking |ARSessionRunOptionRemoveExistingAnchors]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; [self.sceneView.session pause]; }
1.9K100发布于 2018-05-07 - 来自专栏MapleYe
【iOS】基于Realm数据库的记账软件--钱包/记账模块（四）终
这里写图片描述 因此我们只需要在ViewWillAppear，以及ViewWillDisappear对导航栏做设置，代码如下 - (void)viewWillAppear:(BOOL)animated self.topbarView.backgroundColor = [UIColor colorWithHexString:_accountModel.colorStr]; } - (void)viewWillDisappear :(BOOL)animated { [super viewWillDisappear:animated]; // 还原导航栏样式 [self.navigationController.navigationBar
1.1K20发布于 2020-03-30
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