獲得無效的情況下錯誤

Question

我沒有太多的代碼，迄今爲止，僅此展開：

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); 

然後有問題的位，當其註釋掉，錯誤消失：

CGContextSaveGState(context); 

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

CGContextRestoreGState(context); 

下面是簡單的：

UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 

    UIGraphicsEndImageContext(); 

Answer 1

看來，無論是界限0,0,0,0或有與highlightP問題ATH。這些價值從何而來？