动画,(UIView上)

来源：互联网发布：清理上网痕迹软件编辑：程序博客网时间：2024/05/22 04:28

  //UIView动画    //开始动画    [UIView beginAnimations:nil context:nil];        //运动的时间    [UIView setAnimationDuration:2.0f];    //延时启动    //[UIView setAnimationDelay:2.f];        //速度曲线    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];        //重复执行    [UIView setAnimationRepeatAutoreverses:YES];    //重复执行次数    [UIView setAnimationRepeatCount:10];            //代理    [UIView setAnimationDelegate:self];    //开始时候执行    [UIView setAnimationWillStartSelector:@selector(start)];    //结束的时候执行    [UIView setAnimationDidStopSelector:@selector(stop)];            //动画过程    //换背景色    self.myView.backgroundColor=[UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1];    //改位置    CGRect myFrame=self.myView.frame;    //全局变量    static BOOL a =YES;    if (a) {        myFrame.origin.y+=100;        myFrame.size.width+=50;        a=NO;    }    else{        myFrame.origin.y-=100;        myFrame.size.width-=50;        a=YES;    }    self.myView.frame=myFrame;    //改变透明度        //self.myView.alpha=0.1;      //提交动画    [UIView commitAnimations];

block块执行

第一种

//系统自带的block块    [UIView animateWithDuration:2.0f animations:^{        self.myView.backgroundColor=[UIColor purpleColor];            }];

第二种

/第一个block块执行了动画,    //第二个block块是在执行完动画后执行的    [UIView animateWithDuration:2.f animations:^{        self.myView.backgroundColor=[UIColor greenColor];    } completion:^(BOOL finished) {        self.myView.backgroundColor=[UIColor redColor];    }];

第三种

[UIView transitionWithView:self.myView duration:2.f options:UIViewAnimationOptionTransitionFlipFromRight animations:^{        NSLog(@"动画开始");    } completion:^(BOOL finished) {        NSLog(@"动画结束");    }];

旋转

[UIView animateWithDuration:2.0f animations:^{//        self.myView.transform=CGAffineTransformScale(self.myView.transform, 0.5f, 0.5f);        self.myView.transform=CGAffineTransformRotate(self.myView.transform, M_PI_4);    }];

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