音乐播放旋转动画
@interface RootViewController ()
@property (nonatomic, retain) UIImageView *image;
@property(nonatomic,assign)BOOL isSelected;
@end
@implementation RootViewController
- (void)createButtView
{
self.image = [[UIImageView alloc] initWithFrame:CGRectMake(100, 300, 100, 100)];
_image.backgroundColor = [UIColor cyanColor];
_image.layer.cornerRadius = 50;
self.image.image = [UIImage imageNamed:@"iconfont-bofang"];
[self.view addSubview:_image];
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
animation.duration = 1;
animation.fromValue = [NSNumber numberWithInt:0];
animation.toValue = [NSNumber numberWithInt:2 * M_PI];
// 动画重复次数
[animation setRepeatCount:NSIntegerMax];
// 播放完毕后是否逆向回到原位置
[animation setAutoreverses:NO];
// 是否要有叠加的效果
[animation setCumulative:YES];
// 停止动画的速度设为0
self.image.layer.speed = 0;
[self.image.layer addAnimation:animation forKey:@"animtation"];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];
[self.image addGestureRecognizer:tap];
self.image.userInteractionEnabled = YES;
}
-(void)tapAction:(UITapGestureRecognizer *)tap
{
//系统给UIView设置了属于view自己的时间系统
//通过改变view的时间来改变他得动画开始和结束
//获得点击图片时的动画时间，为了下次开始动画用
if (self.isSelected == YES) {
CFTimeInterval stopTime = [self.image.layer convertTime:CACurrentMediaTime() fromLayer:nil];
//停止动画，速度设置为0
self.image.layer.speed = 0;
//设置时间偏移量
self.image.layer.timeOffset = stopTime;
}else{
//开始旋转
//得到view当前动画时间偏移量
CFTimeInterval stopTime = [self.image.layer timeOffset];
//初始化开始时间
self.image.layer.beginTime = 0;
//初始化时间偏移量
self.image.layer.timeOffset = 0;
//设置动画速度
self.image.layer.speed = 1;
//计算时间差
CFTimeInterval tempTime = [self.image.layer convertTime:CACurrentMediaTime() fromLayer:nil] - stopTime;
//重新设置动画开始时间
self.image.layer.beginTime = tempTime;
}
//状态取反
self.isSelected = !self.isSelected;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor redColor];
[self createButtView];
}