1、继承关系
截屏2020-12-13 下午7.48.15.png
2、CAGradientLayer
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
CAGradientLayer *graLayer = [CAGradientLayer layer];
graLayer.frame = CGRectMake(100, 100, 200, 200);
graLayer.colors = @[
(__bridge id)[UIColor redColor].CGColor,
(__bridge id)[UIColor yellowColor].CGColor
];
// graLayer.locations = @[@0, @0.2];
graLayer.startPoint = CGPointMake(0, 0);
graLayer.endPoint = CGPointMake(1, 1);
[self.view.layer addSublayer:graLayer];
}
截屏2020-12-13 下午7.50.07.png
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