UIView - 如何在加载视图时收到通知? [英] UIView - How to get notified when the view is loaded?
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问题描述
对于 UIView $,有什么类似
viewDidLoad
的 UIViewController
C $ C> ???
我需要在 UIView
加载(子类 UIView
)后立即通知我,并执行一些行动。
Is there anything similar to the viewDidLoad
of UIViewController
for a UIView
???
I need to be notified as soon as a UIView
has loaded (Subclass of UIView
), and perform some actions.
推荐答案
根据您需要执行的操作类型,有以下几种方法:
Depending on what kind of actions you need to perform, there are several techniques:
-
- (id)initWithFrame:(CGRect)frame
- UIView指定的
初始值设定项;总是发送到UIView来初始化它,除非从笔尖加载
视图; -
- (id)initWithCoder:(NSCoder *)编码器
- 每当从笔尖加载视图时,总是发送初始化UIView; -
- (void)awakeFromNib
- 在nib中的所有对象初始化并连接后发送;仅在从笔尖加载对象时适用;你必须打电话给super; -
- (void)willMoveToSuperview:(UIView *)newSuperview
- 在视图添加为之前立即发送子视图到另一个视图;从超级视图中删除视图时,newSuperview
可能为零; -
- (void)willMoveToWindow :( UIWindow *)newWindow
- 在视图(或其超级视图)添加到窗口之前立即发送;从窗口中删除视图时,newWindow
可能为nil; -
- (void)didMoveToSuperview
- 在视图插入视图层次结构后立即发送; -
- (void)didMoveToWindow
- 立即发送在视图获取其窗口属性后设置。 -
-(id)initWithFrame:(CGRect)frame
- UIView's designated initializer; always sent to a UIView to initialize it, unless the view is loaded from a nib;-(id)initWithCoder:(NSCoder *)coder
- always sent to initialize a UIView whenever the view is loaded from a nib;-(void)awakeFromNib
- sent after all the objects in the nib are initialized and connected; applicable only if you load the object from a nib; you must call super;-(void)willMoveToSuperview:(UIView *)newSuperview
- sent immediately before the view is added as a subview to another view;newSuperview
may be nil when you remove the view from its superview;-(void)willMoveToWindow:(UIWindow *)newWindow
- sent immediately before the view (or its superview) is added to a window;newWindow
may be nil when you remove the view from a window;-(void)didMoveToSuperview
- sent immediately after the view is inserted into a view hierarchy;-(void)didMoveToWindow
- sent immediately after the view gets its window property set. -
基本上,您可以选择在初始化期间执行操作(1& 2),从笔尖加载后(3) ,在插入视图层次结构(4& 5)之前和之后(6& 7)。
Basically, you can choose to perform your actions during initialization (1 & 2), after loading from a nib (3), before insertion into a view hierarchy (4 & 5) and after that (6 & 7).
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