UIImage与UIColor互转

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Objective-C

UIColor -> UIImage

- (UIImage*) createImageWithColor: (UIColor*) color
{
    CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}

UIImage -> UIColor

[UIColor colorWithPatternImage:[UIImageimageNamed:@"Background"]]

Swift

UIColor -> UIImage

func createImageWithColor(color: UIColor) -> UIImage
{
    let rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f)
    UIGraphicsBeginImageContext(rect.size)
    let context = UIGraphicsGetCurrentContext()
    CGContextSetFillColorWithColor(context, color.CGColor)
    CGContextFillRect(context, rect)
    let theImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return theImage
}

UIImage -> UIColor

UIColor(PatternImage: UIImage(named: @"Background"))

UIImage与UIColor互转

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原文地址：http://my.oschina.net/lavzchen/blog/501694