通过 CAGradientLayer 实现
UIView * gradationView = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 50)]; [self.view addSubview:gradationView]; CAGradientLayer *gradientLayer = [CAGradientLayer layer]; gradientLayer.frame = gradationView.bounds; // 渐变色颜色数组,可多个 gradientLayer.colors = [NSArray arrayWithObjects:(id)[[UIColor redColor] CGColor], (id)[[UIColor greenColor] CGColor], nil]; // 渐变的开始点 (不同的起始点可以实现不同位置的渐变,如图) gradientLayer.startPoint = CGPointMake(0, 0.5f); //(0, 0) // 渐变的结束点 gradientLayer.endPoint = CGPointMake(1, 0.5f); //(1, 1) [gradationView.layer insertSublayer:gradientLayer atIndex:0];