- (void)viewDidLoad {
[super viewDidLoad];
//自转
_view1= [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
_view1.backgroundColor= [UIColor orangeColor];
_view1.layer.cornerRadius= 30;
[self.view addSubview:_view1];
//等比例缩放
//两个参数分别表示,宽度和高度缩放的倍数
_view1.transform=CGAffineTransformMakeScale(0.5, 0.5);
//连续转动
[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(rotation) userInfo:nil repeats:YES];
}
- (void)rotation {
static float angle;
angle += 0.1;
//transform转换
//CGAffineTransformMakeRotation(<#CGFloat angle#>)旋转角度Rotation旋转
//角度为正时,向顺时针方向转动(圆周运动与之相反)
//0.785==45°==M_PI_4
_view1.transform=CGAffineTransformMakeRotation(angle);
//transform属性转换的相对状态是初始状态
}
