漸變

CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = CGRectMake(0, 0, Main_Screen_Width-30, 165);;
    gradient.colors = [NSArray arrayWithObjects:
                       (id)UIColorFromRGB(0xffd55c).CGColor,
                       (id)UIColorFromRGB(0xffb733).CGColor, nil];
    gradient.startPoint = CGPointMake(0, 0);
    gradient.endPoint = CGPointMake(1, 1);
    gradient.locations = @[@0.0, @1.0];
    [self.baseView.layer addSublayer:gradient];
    
    [self.baseView bringSubviewToFront:self.reminderLabel];
    [self.baseView bringSubviewToFront:self.contentLabel];
    [self.baseView bringSubviewToFront:self.amountLabel];