19

CGContextSetFillColorWithColor：无效的上下文 0x0。这是一个严重的错误。此应用程序或它使用的库正在使用无效的上下文，从而导致系统稳定性和可靠性的整体下降。此通知是出于礼貌：请解决此问题。这将成为即将到来的更新中的致命错误。

我从这个方法的 [color setFill] 行得到错误。关于如何解决它的任何想法？

+ (UIImage *)fillImage:(UIImage*)image withColor:(UIColor *)color
{

    // begin a new image context, to draw our colored image onto
    UIGraphicsBeginImageContextWithOptions(image.size, NO, [[UIScreen mainScreen] scale]);

    // get a reference to that context we created
    CGContextRef context = UIGraphicsGetCurrentContext();

    // set the fill color
    [color setFill];

    // translate/flip the graphics context (for transforming from CG* coords to UI* coords
    CGContextTranslateCTM(context, 0, image.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    // set the blend mode to overlay, and the original image
    CGContextSetBlendMode(context, kCGBlendModeOverlay);
    CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
    //if(overlay) CGContextDrawImage(context, rect, img.CGImage);

    // set a mask that matches the shape of the image, then draw (overlay) a colored rectangle
    CGContextClipToMask(context, rect, image.CGImage);
    CGContextAddRect(context, rect);
    CGContextDrawPath(context,kCGPathFill);

    // generate a new UIImage from the graphics context we drew onto
    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    //return the color-burned image
    return coloredImg;
}
4

1 回答 1

20

您image.size的无效，因此UIGraphicsBeginImageContextWithOptions没有创建图形上下文。两者image.size.width和都image.size.height必须是正的有限数。

可能image本身就是nil。当你把size消息发送到nil，你就回来了CGSizeZero。

于 2013-11-12T22:31:08.637 回答