ios 渐变色

    //初始化渐变层

    //self.view.backgroundColor = [UIColor colorWithRed:0 green:129 blue:190 alpha:1];

    self.gradientLayer = [CAGradientLayerlayer];

    self.gradientLayer.frame =self.view.bounds;

    [self.view.layeraddSublayer:self.gradientLayer];

    

    //设置渐变颜色方向

    self.gradientLayer.startPoint =CGPointMake(0,0.5);

    

    self.gradientLayer.endPoint =CGPointMake(1,0.5);

    

    //设定颜色组

 //   self.gradientLayer.colors = @[(__bridge id)[UIColor colorWithRed:0.0/255.0 green:171.0/255.0 blue:225.0/255.0 alpha:1].CGColor,

                               //   (__bridge id)[UIColor colorWithRed:0.0/225.0 green:129.0/255.0 blue:190.0/255.0 alpha:1].CGColor];

    

    UIColor *paleColor = [UIColorcolorWithRed:0.0/255.0green:210.0/255.0blue:225.0/255.0alpha:1];

    UIColor *darkColor = [UIColorcolorWithRed:0.0/225.0green:129.0/255.0blue:190.0/255.0alpha:1];

    

    self.gradientLayer.colors =@[(__bridgeid)darkColor.CGColor,

                                  (__bridgeid)paleColor.CGColor,

                                  (__bridgeid)darkColor.CGColor];

    

    //设定颜色分割点

    self.gradientLayer.locations =@[@(0.0F) ,@(0.25f)];

    

}