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,从而有助于整体降低系统的稳定性和可靠性.这个通知是礼貌的：请解决这个问题.这将在即将到来的更新中成为致命的错误.
我从这个方法的[color setFill]行得到错误.有什么想法可以解决吗？
+ (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,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,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,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;
}
解决方法
您的image.size无效,因此UIGraphicsBeginImageContextWithOptions不会创建图形上下文. image.size.width都必须是正数,有限数.
图像本身可能是零.当您将大小消息发送到nil时,您将返回CGSizeZero.
