获得无效的情况下错误

Question

我没有太多的代码，迄今为止，仅此展开：

UIGraphicsBeginImageContextWithOptions(bounds.size, NO, 0); 

    CGContextRef context = UIGraphicsGetCurrentContext(); 
CGMutablePathRef outerPath; 

CGMutablePathRef highlightPath; 

CGRect outerRect = rectForRectWithInset(bounds, 1); 

CGRect highlightRect = CGRectMake(outerRect.origin.x, 
             outerRect.origin.y + 1, 
             outerRect.size.width, 
             outerRect.size.height); 

然后有问题的位，当其注释掉，错误消失：

CGContextSaveGState(context); 

CGContextAddPath(context, highlightPath); 
CGContextSetFillColorWithColor(context, [[UIColor colorWithWhite:1.0 alpha:0.05]CGColor]); 
CGContextFillPath(context); 

CGContextRestoreGState(context); 

下面是简单的：

UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 

    UIGraphicsEndImageContext(); 

Answer 1

看来，无论是界限0,0,0,0或有与highlightP问题ATH。这些价值从何而来？