使用手势将UIWebView中的图像保存到相机胶卷

Question

嗨我有点卡住保存图像，我已经构建了一个手势，并按照教程，但我有点卡住实际保存图像的最后部分。 非常感谢任何帮助。这是教程的来源

http://bees4honey.com/blog/tutorial/how-to-save-an-image-from-uiwebview/

提前致谢

    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap:)];
doubleTap.numberOfTouchesRequired = 2;
[self.myWebView addGestureRecognizer:doubleTap];


}

-(void) doubleTap :(UITapGestureRecognizer*) sender {
int scrollPositionY = [[self.myWebView stringByEvaluatingJavaScriptFromString:@"window.pageYOffset"] intValue];
int scrollPositionX = [[self.myWebView stringByEvaluatingJavaScriptFromString:@"window.pageXOffset"] intValue];

int displayWidth = [[self.myWebView stringByEvaluatingJavaScriptFromString:@"window.outerWidth"] intValue];
CGFloat scale = myWebView.frame.size.width / displayWidth;

CGPoint pt = [sender locationInView:self.myWebView];
pt.x *= scale;
pt.y *= scale;
pt.x += scrollPositionX;
pt.y += scrollPositionY;

NSString *js = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).tagName", pt.x, pt.y];
NSString * tagName = [self.myWebView stringByEvaluatingJavaScriptFromString:js];

NSString *imgURL = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).src", startPoint.x, startPoint.y];
NSString *urlToSave = [self.myWebView stringByEvaluatingJavaScriptFromString:imgURL];


/// Stuck at this point to actually get the file

}

Answer 1

NSURL *url = [NSURL URLWithString:urlToSave];

UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];

UIImageWriteToSavedPhotosAlbum(image, <#id completionTarget#>, <#SEL completionSelector#>, <#void *contextInfo#>)

您可以将nil传递给所有三个参数。 所以你可以打电话

UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);