UIView Animation效果

之前受某人影响以为一连串的UIView Animation 只能这么写：

在某个animation 设置delegate ，然后在 delegate 函数中再调用另一个函数。



今天偷闲决定看 iPhone cookbook 代码查漏补缺下，结果发现这代码：


C代码
// Hide the bar button and show the view
self.navigationItem.rightBarButtonItem = nil;
[self.view viewWithTag:101].alpha = 1.0f;

// Bounce to 115% of the normal size
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.4f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(1.15f, 1.15f);
[UIView commitModalAnimations];

// Return back to 100%
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.3f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(1.0f, 1.0f);
[UIView commitModalAnimations];

// Pause for a second and appreciate the presentation
[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0f]];

// Slowly zoom back down and hide the view
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:1.0f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(0.01f, 0.01f);
[UIView commitModalAnimations];

// Restore the bar button
[self.view viewWithTag:101].alpha = 0.0f;



tnnd 原来可以这么写。

同时学到个新玩意。


C代码
[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0f]];



PS. 原来这个例子就叫做 Modal View Animation 罪过罪过，搞了这么久iPhone还不知道这东西。



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#### 抱歉，看错了，原来是作者自己实现的方法 ########

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仔细一看原来


C代码
commitModalAnimations

具体代码实现是这样的。
Java代码
@interface UIViewDelegate : NSObject
{
CFRunLoopRef currentLoop;
}
@end

@implementation UIViewDelegate
-(id) initWithRunLoop: (CFRunLoopRef)runLoop
{
if (self = [super init]) currentLoop = runLoop;
return self;
}

-(void) animationFinished: (id) sender
{
CFRunLoopStop(currentLoop);
}
@end

@implementation UIView (ModalAnimationHelper)
+ (void) commitModalAnimations
{
CFRunLoopRef currentLoop = CFRunLoopGetCurrent();

UIViewDelegate *uivdelegate = [[UIViewDelegate alloc] initWithRunLoop:currentLoop];
[UIView setAnimationDelegate:uivdelegate];
[UIView setAnimationDidStopSelector:@selector(animationFinished:)];
[UIView commitAnimations];
CFRunLoopRun();
[uivdelegate release];
}
@end