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在ios4.0及以后鼓励使用animateWithDuration方法来实现动画效果。当然,以往的begin/commit的方法依然使用,下面详细解释一下animateWithDuration的使用方法。
函数原型:
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion
其中,
下面是可以设置动画效果的属性:
例如一个视图淡出屏幕,另外一个视图出现的代码:
[UIView animateWithDuration:1.0 animations:^{ firstView.alpha = 0.0; secondView.alpha = 1.0; }];
如何实现连续的动画?
可以在completion代码块中添加动画。
下面是实例代码:
[UIView animateWithDuration:2.0 animations:^{ oldImageView.alpha = 0.0; newImageView.alpha = 1.0; //imageView.center = CGPointMake(500.0, 512.0); } completion:^(BOOL finished){ [UIView animateWithDuration:4.0 animations:^{ newImageView.center = CGPointMake(500.0, 512.0); }]; }];
UIView animateWithDuration 使用详解
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原文地址:http://www.cnblogs.com/SnowStark/p/5658998.html