CGContextSetFillColorWithColor：无效的上下文0x0 [英] CGContextSetFillColorWithColor: invalid context 0x0

问题描述

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。它将成为即将到来的更新中的致命错误。

CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

我从此方法的[color setFill]行收到错误。关于如何解决它的任何想法？

I'm getting the error from the [color setFill] line of this method. Any ideas on how I can resolve it?

+ (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;
}

推荐答案

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

Your image.size isn't valid, so UIGraphicsBeginImageContextWithOptions isn't creating a graphics context. Both image.size.width must be positive, finite numbers.

可能 image 本身是 nil 。当您将 size 消息发送到 nil 时，您将返回 CGSizeZero 。

Possibly image itself is nil. When you send the size message to nil, you get back CGSizeZero.

这篇关于CGContextSetFillColorWithColor：无效的上下文0x0的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！