我有简单的UIWebView
加载的html文件。我想显示PopOverController
指向所选文本,如 -
。
我想要coordinates
中所选文字的UIWebView
。
如果我将scalesPageToFit
的{{1}}属性设置为UIWebView
,则this链接可以正常工作。如果我将NO
的{{1}}属性设置为scalesPageToFit
,则会失败。
任何人都可以帮我解决我的问题。
答案 0 :(得分:1)
首先删除原生的长按手势识别器,如下所示:
for(UIGestureRecognizer *gesRecog in yourWebView.gestureRecognizers)
{
if([gesRecog isKindOfClass:[UILongPressGestureRecognizer class]])
{
[startTF removeGestureRecognizer:gesRecog];
}
}
然后分配一个自定义的:
UILongPressGestureRecognizer *myOwnLongPressRecog = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleWebViewLongpress:)];
// set numberOfTapsRequired and numberOfTouchesRequired as per your requirement:
[yourWebView addGestureRecognizer:myOwnLongPressRecog];
//像这样处理长按:
- (void) handleWebViewLongpress: (UIGestureRecognizer *) recog
{
int zoomedWidth = [[yourWebView stringByEvaluatingJavaScriptFromString:@"window.innerWidth"] intValue];
CGFloat scale = yourWebView.frame.size.width / zoomedWidth; // get the scaled value of your web view
CGPoint zoomedCords = [gesture locationInView:self.webView];
zoomedCords.x /= scale; // Normal math. Divide by the scale to get the real thing.
zoomedCords.y /= scale;
NSLog(@"%@", zoomedCords);
}
答案 1 :(得分:1)
这必须在JavaScript中几乎完全完成,然后将结果传回Objective C.如果您可以控制所显示的内容,则可以将此函数添加到<script>
标记中。否则,您需要按this post。
function rectsForSelection() {
var i = 0, j = 0;
var allSelections = window.getSelection();
var result = []; // An empty array right now
// Generally, there is only one selection, but the spec allows multiple
for (i=0; i < allSelections.rangeCount; i++) {
var aRange = allSelections.getRangeAt(i);
var rects = aRange.getClientRects();
for (j=0; j<rects.length; j++) {
result.push(rects[j]);
}
}
return JSON.stringify(result);
}
然后从您的Objective C代码中,您可以使用以下内容:
NSString *rectsString = [webView stringByEvaluatingJavaScriptFromString:@"rectsForSelection();"];
NSData *rectsData = [rectsString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *rects = [NSJSONSerialization JSONObjectWithData:rectsData
options:0
error:NULL]; //Do Your Own Error Checking
我将补充说,这将获得在webView.scrollView
内有效的坐标,而不是webView
。
答案 2 :(得分:0)
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(getCoordinates:)];
// [longPress setMinimumPressDuration:1];
[yourWebView addGestureRecognizer:longPress];
- (void)getCoordinates:(UILongPressGestureRecognizer *)sender {
CGPoint location = [sender locationInView:self.view];
NSLog(@"Tap at %1.0f, %1.0f", location.x, location.y);
}
答案 3 :(得分:0)
UIWebView实际上将HTML呈现为UIViews,特别是它可能会将可选文本呈现为UITextView,因此您需要尝试使用右侧视图的委托方法。
这是一个应该有效的黑客攻击:
UITextViewDelegate
方法textViewDidChangeSelection:
以获取selectedRange并与之互动。**步骤3和4的替代方法是使用KVO来监听textView的selectedRange中的更改。