iphone的动画效果类型及实现方法(收集)

实现iPhone漂亮的动画效果主要有两种方法，

   一种是UIView层面的，

  一种是使用CATransition进行更低层次的控制，

 

      第一种是UIView，UIView方式可能在低层也是使用CATransition进行了封装，它只能用于一些简单的、常用的效果展现，这里写一个常用的示例代码，供大家参考。

 

 [UIView beginAnimations:@"Curl"context:nil];//动画开始
 [UIView setAnimationDuration:0.75];
 [UIView setAnimationDelegate:self];
 [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:myview cache:YES];
[myview removeFromSuperview];
[UIView commitAnimations];

 

 

       第二种方式相对复杂一些，但如果更好的进行控制，还是使用这种方法吧，

基本使用方法可以看一下如下例子：

 

CATransition *animation = [CATransition animation];
[animation setDuration:1.25f];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];
[animation setType:kCATransitionReveal];
[animation setSubtype: kCATransitionFromBottom];
[self.view.layer addAnimation:animation forKey:@"Reveal"];

 

这里使用了setType与setSubtype组合，这使用个比较保险，因为他的参数就是官方API里定义的，他们的参数说明可以参考如下：

 

[animation setType:@"suckEffect"];

这里的suckEffect就是效果名称，可以用的效果主要有：

pageCurl 向上翻一页

pageUnCurl 向下翻一页

rippleEffect 滴水效果

suckEffect 收缩效果，如一块布被抽走

cube 立方体效果

oglFlip 上下翻转效果

 I have been using the latter for a lot of nice lightweight animations. You can use it crossfade two views, or fade one in in front of another, or fade it out. You can shoot a view over another like a banner, you can make a view stretch or shrink... I'm getting a lot of mileage out of beginAnimation/commitAnimations.

Don't think that all you can do is:

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:myview cache:YES];

Here is a sample:

[UIView beginAnimations:nil context:NULL]; {
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:1.0];
        [UIView setAnimationDelegate:self];
        if (movingViewIn) {
// after the animation is over, call afterAnimationProceedWithGame
//  to start the game
                [UIView setAnimationDidStopSelector:@selector(afterAnimationProceedWithGame)];

//              [UIView setAnimationRepeatCount:5.0]; // don't forget you can repeat an animation
//              [UIView setAnimationDelay:0.50];
//              [UIView setAnimationRepeatAutoreverses:YES];

                gameView.alpha = 1.0;
                topGameView.alpha = 1.0;
                viewrect1.origin.y = selfrect.size.height - (viewrect1.size.height);
                viewrect2.origin.y = -20;

                topGameView.alpha = 1.0;
        }
        else {
        // call putBackStatusBar after animation to restore the state after this animation
                [UIView setAnimationDidStopSelector:@selector(putBackStatusBar)];
                gameView.alpha = 0.0;
                topGameView.alpha = 0.0;
        }
        [gameView setFrame:viewrect1];
        [topGameView setFrame:viewrect2];

} [UIView commitAnimations];

As you can see, you can play with alpha, frames, and even sizes of a view. Play around. You may be surprised with its capabilities.

 

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Dashed & solid line when using CGContext drawing

To get dashed line:

CGContextRef context = UIGraphicsGetCurrentContext();

float dash[2]={6 ,5}; // pattern 6 times “solid”, 5 times “empty”

CGContextSetLineDash(context,0,dash,2);

To get back to solid line:

float normal[1]={1};

CGContextSetLineDash(context,0,normal,0);