在圖片上覆蓋顏色

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- (UIImage *)image:(UIImage *)argImage

thintedWithColor:(UIColor *)argColor

{

if (argColor != nil)

{

UIGraphicsBeginImageContext([argImage size]);

CGContextRef currentContext = UIGraphicsGetCurrentContext();

CGImageRef maskImage = [argImage CGImage];

CGContextClipToMask(currentContext, CGRectMake(0.0, 0.0, [argImage size].width, [argImage size].height), maskImage);

CGContextDrawImage(currentContext, CGRectMake(0.0, 0.0, [argImage size].width, [argImage size].height), [argImage CGImage]);

[argImage drawAtPoint:CGPointMake(0.0, 0.0)];

[argColor setFill];

UIRectFillUsingBlendMode(CGRectMake(0.0, 0.0, [argImage size].width, [argImage size].height), kCGBlendModeColor);

UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return newImage;

}

else

{

return argImage;

}