//给view添加渐变色
+ (void)gradualChange:(UIView*)viewwithFirstColor:(UIColor*)firstColorwithSecondColor:(UIColor*)secondColor {//颜色渐变
CAGradientLayer *gradientL = [CAGradientLayer layer];
gradientL.frame= view.bounds;
gradientL.startPoint=CGPointMake(0,0);
gradientL.endPoint=CGPointMake(0,1.0);//从上到下: CGPointMake(0,1.0) 2. 从左到右: CGPointMake(1.0, 0);
gradientL.colors = [NSArray arrayWithObjects:
(__bridgeid)firstColor.CGColor,
(__bridgeid)secondColor.CGColor,nil];
[view.layeraddSublayer:gradientL];
}
