我有一个UIWebView
来加载htmlString
的文字。
我需要当用户选择文本的一部分并按下按钮时,我将能够提取它以便在其他地方使用它,所以我使用此代码:
// The JS File
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"HighlightedString" ofType:@"js" inDirectory:@""];
NSData *fileData = [NSData dataWithContentsOfFile:filePath];
NSString *jsString = [[NSMutableString alloc] initWithData:fileData encoding:NSUTF8StringEncoding];
[WebV2 stringByEvaluatingJavaScriptFromString:jsString];
// The JS Function
NSString *startSearch = [NSString stringWithFormat:@"getHighlightedString()"];
[WebV2 stringByEvaluatingJavaScriptFromString:startSearch];
NSString *selectedText = [NSString stringWithFormat:@"selectedText"];
NSString * highlightedString = [WebV2 stringByEvaluatingJavaScriptFromString:selectedText];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Highlighted String"
message:highlightedString
delegate:nil
cancelButtonTitle:@"Oh Yeah"
otherButtonTitles:nil];
[alert show];
与HighlightedString.js
:
/*!
------------------------------------------------------------------------
// Search Highlighted String
------------------------------------------------------------------------
*/
var selectedText = "";
function getHighlightedString() {
var text = window.getSelection();
selectedText = text.anchorNode.textContent.substr(text.anchorOffset, text.focusOffset - text.anchorOffset);
}
// ...
function stylizeHighlightedString() {
var range = window.getSelection().getRangeAt(0);
var selectionContents = range.extractContents();
var span = document.createElement("span");
span.appendChild(selectionContents);
span.setAttribute("class","uiWebviewHighlight");
span.style.backgroundColor = "black";
span.style.color = "white";
range.insertNode(span);
}
// helper function, recursively removes the highlights in elements and their childs
function uiWebview_RemoveAllHighlightsForElement(element) {
if (element) {
if (element.nodeType == 1) {
if (element.getAttribute("class") == "uiWebviewHighlight") {
var text = element.removeChild(element.firstChild);
element.parentNode.insertBefore(text,element);
element.parentNode.removeChild(element);
return true;
} else {
var normalize = false;
for (var i=element.childNodes.length-1; i>=0; i--) {
if (uiWebview_RemoveAllHighlightsForElement(element.childNodes[i])) {
normalize = true;
}
}
if (normalize) {
element.normalize();
}
}
}
}
return false;
}
// the main entry point to remove the highlights
function uiWebview_RemoveAllHighlights() {
selectedText = "";
uiWebview_RemoveAllHighlightsForElement(document.body);
}
我总是得不到任何结果......警报视图没有显示任何内容......此代码有什么问题?有帮助吗?有任何想法吗 ?非常感谢。
答案 0 :(得分:14)
解决方案实际上非常简单,不需要上述所有代码! 对于任何未来的用户,只需使用:
NSString *textToSpeech = [WebV2 stringByEvaluatingJavaScriptFromString: @"window.getSelection().toString()"];
NSLog(@" -**-*--****-*---**--*-* This is the new select text %@",[WebV2 stringByEvaluatingJavaScriptFromString: @"window.getSelection().toString()"] );
答案 1 :(得分:2)
NSString *theSelectedText = [self.webView stringByEvaluatingJavaScriptFromString:@"window.getSelection().toString()"];
这会将您的选择传递给字符串变量。