实例讲解iOS应用UI开发之基础动画的创建

{
    NSLog(@"开始动画");
}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
    NSLog(@"结束动画");
}
@end

说明：可以通过path属性，让layer在指定的轨迹上运动。

 

停止动画：

复制代码
#import "YYViewController.h"

 

@interface YYViewController ()
@property (weak, nonatomic) IBOutlet UIView *customView;
- (IBAction)stopOnClick:(UIButton *)sender;

@end

复制代码
@implementation YYViewController

 

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    //1.创建核心动画
    CAKeyframeAnimation *keyAnima=[CAKeyframeAnimation animation];
    //平移
    keyAnima.keyPath=@"position";
    //1.1告诉系统要执行什么动画
    //创建一条路径
    CGMutablePathRef path=CGPathCreateMutable();
    //设置一个圆的路径
    CGPathAddEllipseInRect(path, NULL, CGRectMake(150, 100, 100, 100));
    keyAnima.path=path;
    
    //有create就一定要有release
    CGPathRelease(path);
    //1.2设置动画执行完毕后，不删除动画
    keyAnima.removedOnCompletion=NO;
    //1.3设置保存动画的最新状态
    keyAnima.fillMode=kCAFillModeForwards;
    //1.4设置动画执行的时间
    keyAnima.duration=5.0;
    //1.5设置动画的节奏
    keyAnima.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    
    //2.添加核心动画
    [self.customView.layer addAnimation:keyAnima forKey:@"wendingding"];
}

- (IBAction)stopOnClick:(UIButton *)sender {
    //停止self.customView.layer上名称标示为wendingding的动画
    [self.customView.layer removeAnimationForKey:@"wendingding"];
}
@end