實現文字漸變色的方法網上有很多,但是很多初學小伙伴對代碼的理解存在著問題(一開始我也是一樣),所以我利用本人一點淺顯的理解為剛入門的小伙伴做一下解答.

_lable = [[UILabel alloc] init];

//    _lable.frame = CGRectMake(100, 200, 300, 20);

_lable.text = @"這樣寫可能會更好理解一點";

//    [self.view addSubview:_lable];

CAGradientLayer *gradientLayer = [CAGradientLayer layer];

gradientLayer.colors = @[(id)[UIColor redColor].CGColor, (id)[UIColor greenColor].CGColor, (id)[UIColor blueColor].CGColor];

//gradientLayer.locations = @[@0, @0.5, @1];// 默認就是均勻分布

gradientLayer.startPoint = CGPointMake(0.5, 0);

gradientLayer.endPoint = CGPointMake(0.5, 1);

gradientLayer.frame = CGRectMake(100, 200, 300, 20);

_lable.frame = gradientLayer.bounds;//設置_lable的坐標

//    _lable.layer.frame = gradientLayer.bounds;//和上面的代碼一個效果

gradientLayer.mask = _lable.layer;//可以理解為([gradientLayer addSubview:_lable])

[self.view.layer addSublayer:gradientLayer];