我在輸出視圖中看到這些錯誤。我試圖將圖像混合到另一個圖像上,我的程序也提供了所需的輸出。只是想知道爲什麼會出現這些錯誤,以及如何刪除它們?我的代碼編寫如下:
錯誤:混合2圖像時出錯
<Error>: CGContextSaveGState: invalid context 0x0
<Error>: CGContextSetBlendMode: invalid context 0x0
<Error>: CGContextSetAlpha: invalid context 0x0
<Error>: CGContextTranslateCTM: invalid context 0x0
<Error>: CGContextScaleCTM: invalid context 0x0
<Error>: CGContextDrawImage: invalid context 0x0
<Error>: CGContextRestoreGState: invalid context 0x0
代碼:
(UIImage*) blendImage
{
CGFloat ox = self.scrollView.contentOffset.x;
CGFloat oy = self.scrollView.contentOffset.y;
CGFloat zoomScale = self.scrollView.zoomScale;
CGFloat cx = (ox + self.cropRectangleButton.frame.origin.x -75.0f) *2.0f/zoomScale;
CGFloat cy = (oy + self.cropRectangleButton.frame.origin.y -85.0f)*2.0f/zoomScale;
CGFloat cw = 600.0f/zoomScale;
CGFloat ch = 600.0f/zoomScale;
CGRect cropRect = CGRectMake(cx, cy, cw, ch);
UIImage *maskImage=[UIImage imageNamed:@"teeth02"];
[maskImage drawInRect:cropRect];
[self.photo drawInRect:imageViewFrame];
UIGraphicsBeginImageContext(self.photo.size);
[self.photo drawAtPoint:CGPointMake(0,0)];
[maskImage drawAtPoint:CGPointMake(cx, cy)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
哪裏和如何?你能幫忙嗎?我是新來的 –
對不起誤解 – Aravindhan