ios新建CALayer

1     // 如果一个控制是另外一个控件的子控件, 那么这个控件中的layer也是另外一个控件的子layer
2      NSLog(@"star - %@", self.view.layer.sublayers);
3     CALayer *layer = [CALayer layer];
4     layer.backgroundColor = [UIColor redColor].CGColor;
5     layer.bounds = CGRectMake(0, 0, 100, 100);
6     layer.position = CGPointMake(200, 200);
7     layer.contents = (id)[UIImage imageNamed:@"me"].CGImage;
8     [self.view.layer addSublayer:layer];