我正在尝试从 UIWebView 获取复制的图像使用 UIPasteboard .
[_myWebView copy:[UIApplication sharedApplication]]; //Copy selection to general pasteboard
NSArray* types = [NSArray arrayWithArray:[UIPasteboard generalPasteboard].pasteboardTypes];
NSLog(@"Type %@", [types objectAtIndex:0]);
if([[UIPasteboard generalPasteboard] containsPasteboardTypes:UIPasteboardTypeListString]){
NSLog(@"text selected %@",[UIPasteboard generalPasteboard].string);
}else if([[UIPasteboard generalPasteboard] containsPasteboardTypes:UIPasteboardTypeListImage]){
NSLog(@"image selected");
}else if ([[UIPasteboard generalPasteboard] containsPasteboardTypes:UIPasteboardTypeListURL]){
NSLog(@"url selected");
}
如果我复制文本没关系，但如果我复制图像，我会得到:
WebController.m:445 > Type com.apple.rtfd
WebController.m:458 > text selected {\rtf1\ansi\ansicpg1252
{\fonttbl\f0\fnil\fcharset0 .SFUIText-Regular;}
{\colortbl;\red255\green255\blue255;\red45\green45\blue45;}
\deftab720
\pard\pardeftab720\qc\partightenfactor0
\f0\fs32 \cf2 \expnd0\expndtw0\kerning0
\outl0\strokewidth0 \strokec2 \
}
我尝试了来自不同网站的许多图像，但我总是得到 rtfd 类型，这实际上是富文本。有人可以帮忙吗？
最佳答案
我找到了一个解决方案:
1)在您的网页 View 中添加长按手势
UILongPressGestureRecognizer* longTap = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:nil];
longTap.delegate = self;
[_myWebView addGestureRecognizer:longTap];
2)实现委托(delegate)方法
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
NSLog(@"TAPPED");
if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
CGPoint touchPoint = [touch locationInView:self.view];
NSString *imgURL = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).src", touchPoint.x, touchPoint.y];
NSString *urlToSave = [_myWebView stringByEvaluatingJavaScriptFromString:imgURL];
NSURL * imageURL = [NSURL URLWithString:urlToSave];
NSLog(@"image URL :%@",urlToSave);
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage * image = [UIImage imageWithData:imageData];
NSLog(@"Image:%.00fx%.00f",image.size.height,image.size.width);
if (image != nil) {
NSLog(@"image exist 1");
_selectedImageDataAtPoint = imageData;
}
}
return YES;
}
其中“_selectedImageDataAtPoint”是 NSData 类型的类变量，用于存储数据图像(如果存在)
3)在用于获取文本和图像的方法中选择后检查数据是否存在
[_myWebView copy:[UIApplication sharedApplication]]; //Copy selection to general pasteboard
NSArray* types = [NSArray arrayWithArray:[UIPasteboard generalPasteboard].pasteboardTypes];
NSLog(@"Type %@", [types objectAtIndex:0]);
if ([[types objectAtIndex:0] isEqualToString:@"com.apple.rtfd"]) {
if ([UIImage imageWithData:_selectedImageDataAtPoint] != nil) {
NSLog(@"image exist 2");
_manualRecipe.imageData = _selectedImageDataAtPoint;
[self openActivityWithImage];
}
}else if([[UIPasteboard generalPasteboard] containsPasteboardTypes:UIPasteboardTypeListString]){
NSLog(@"text selected: %@",[UIPasteboard generalPasteboard].string);
NSString* text = [UIPasteboard generalPasteboard].string;
[self openActivityWithText:text];
}
关键是为了从网络上选择文本或图像，用户长按，所以我添加了另一个 UILongPressGestureRecognizer 来获取图像。之后，我展示了我的自定义 UIMenuItem 以让用户保存选择。
关于ios - 使用 UIPasteboard 从 UIWebView 获取图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32267818/