iOS為UIView的子類添加漸層顏色

標籤：

+ (UIColor*) gradientFromColor:(UIColor*)c1 toColor:(UIColor*)c2 withWidth:(CGFloat)width andHeight:(CGFloat)height{    CGSize size = CGSizeMake(width, height);    UIGraphicsBeginImageContextWithOptions(size, NO, 0);    CGContextRef context = UIGraphicsGetCurrentContext();    CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();        NSArray* colors = [NSArray arrayWithObjects:(id)c1.CGColor, (id)c2.CGColor, nil];    CGGradientRef gradient = CGGradientCreateWithColors(colorspace, (CFArrayRef)colors, NULL);    CGContextDrawLinearGradient(context, gradient, CGPointMake(0, 0), CGPointMake(size.width, size.height), 0);        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();        CGGradientRelease(gradient);    CGColorSpaceRelease(colorspace);    UIGraphicsEndImageContext();        return [UIColor colorWithPatternImage:image];}

　　

比如給一個UILabel設定了漸層顏色的效果

設定漸層背景色

 

設定簡便字型色

 

iOS為UIView的子類添加漸層顏色