Question

CGContextSetFillColorWithColor：无效的上下文0x0。这是一个严重的错误。该应用程序或其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降低。此通知是礼貌的：请解决此问题。在即将到来的更新中，它将成为一个致命的错误。

我从此方法的[color setFill]行中收到错误。关于我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;
}

Answer 1

您的image.size无效，因此UIGraphicsBeginImageContextWithOptions未创建图形上下文。 image.size.width和image.size.height都必须为正数，有限数。

image本身可能是nil。当您将size邮件发送至nil时，您会收到CGSizeZero。

CGContextSetFillColorWithColor：无效的上下文0x0

1 个答案: