viewWillAppear/viewDidAppear/viewWillDisappear/viewDidDisappear
来源:互联网 发布:淘宝上刷到单的步骤 编辑:程序博客网 时间:2024/05/04 13:35
viewWillAppear:
Called when the view is about to made visible. Default does nothing视图即将可见时调用。默认情况下不执行任何操作
viewDidAppear:
Called when the view has been fully transitioned onto the screen. Default does nothing视图已完全过渡到屏幕上时调用
viewWillDisappear:
Called when the view is dismissed, covered or otherwise hidden. Default does nothing视图被驳回时调用,覆盖或以其他方式隐藏。默认情况下不执行任何操作
viewDidDisappear:
Called after the view was dismissed, covered or otherwise hidden. Default does nothing视图被驳回后调用,覆盖或以其他方式隐藏。默认情况下不执行任何操作loadView; This is where subclasses should create their custom view hierarchy if they aren't using a nib. Should never be called directly.这是当他们没有正在使用nib视图页面,子类将会创建自己的自定义视图层。绝不能直接调用。
viewDidLoad;Called after the view has been loaded. For view controllers created in code, this is after -loadView. For view controllers unarchived from a nib, this is after the view is set.
在视图加载后被调用,如果是在代码中创建的视图加载器,他将会在loadView方法后被调用,如果是从nib视图页面输出,他将会在视图设置好后后被调用。「initWithNibName: bundle:」载入nib档案来初始化「loadView」载入视图「viewDidLoad」在载入视图至内存后会呼叫的方法「viewDidUnload」在视图从内存中释放后会呼叫的方法 (当内存过低,释放一些不需要的视图时调用)
「viewWillAppear」当收到视图在视窗将可见时的通知会呼叫的方法
「viewDidAppear」当收到视图在视窗已可见时的通知会呼叫的方法
「viewWillDisappear」当收到视图将去除、被覆盖或隐藏于视窗时的通知会呼叫的方法
「viewDidDisappear」当收到视图已去除、被覆盖或隐藏于视窗时的通知会呼叫的方法
「didReceiveMemoryWarning」收到系统传来的内存警告通知后会执行的方法
「shouldAutorotateToInterfaceOrientation」是否支持不同方向的旋转视图
「willAnimateRotationToInterfaceOrientation」在进行旋转视图前的会执行的方法(用于调整旋转视图之用)
当一个视图控制器被创建,并在屏幕上显示的时候。 代码的执行顺序
1、 alloc 创建对象,分配空间
2、init (initWithNibName) 初始化对象,初始化数据
3、loadView 从nib载入视图 ,通常这一步不需要去干涉。除非你没有使用xib文件创建视图
4、viewDidLoad 载入完成,可以进行自定义数据以及动态创建其他控件
5、viewWillAppear 视图将出现在屏幕之前,马上这个视图就会被展现在屏幕上了
6、viewDidAppear 视图已在屏幕上渲染完成
当一个视图被移除屏幕并且销毁的时候的执行顺序,这个顺序差不多和上面的相反
1、viewWillDisappear 视图将被从屏幕上移除之前执行
2、viewDidDisappear 视图已经被从屏幕上移除,用户看不到这个视图了
3、dealloc 视图被销毁,此处需要对你在init和viewDidLoad中创建的对象进行释放- viewWillAppear/viewDidAppear/viewWillDisappear/viewDidDisappear
- viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView
- viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView
- viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView
- viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear
- ios:viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView
- iOS开发:viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear
- viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView; 使用时的区别
- IOS开发(34)之viewWillAppear: viewDidAppear: viewWillDisappear:viewDidDisappear:loadView
- init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear、viewWillUnload区别
- init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
- 画面跳转各方法调用的时机-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear
- IOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
- viewDidLoad、viewDidUnload、viewWillAppear、viewDidAppear、viewWillDisappear 和 -viewDidDisappear的区别和使用
- iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
- iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用
- iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
- iOS视图控制对象生命周期-init、viewDidLoad、viewWillAppear、viewDidAppear、viewWillDisappear、viewDidDisappear的区别及用途
- java.lang.RuntimeException: Unable to instantiate activity ComponentInfo异常解决
- 操作系统实践(5)——关于LDT
- 网x速x数x据x流x量x
- android studio引入第三方jar包
- 《穆斯林的葬礼》读后感
- viewWillAppear/viewDidAppear/viewWillDisappear/viewDidDisappear
- protocol Buffer_转载
- python2《=》python3 某些库函数互相转换的个人总结 =>持续更新
- hello eveyone
- LeetCode 9: Palindrome Number
- 框架
- viewWillAppear
- Cocos2d-x 详解坐标系统
- [Emacs学习笔记]停止与撤销