更改html文本颜色而无需重新加载Webview
[英]Change html text color without reloading the webview
问题描述
I'm wondering how can I change the html text color without reloading the webview because with the code I'm using currently, when I scroll down the webview that's holding the html file then click the button that I set to change the html text color, the page jumps again to the beginning of the html file. 
我想知道如何在不重新加载webview的情况下更改html文本颜色，因为使用当前使用的代码，当我向下滚动保存html文件的webview时，单击我设置为更改html文本颜色的按钮，页面再次跳到html文件的开头。 I think that happens because the webview is being reloaded every time I click the button. 我认为是因为每次单击按钮都会重新加载Web视图。 What do you thinks guys? 你们怎么看？
The code I'm using 我正在使用的代码
NSString *myHtmlFile = [[NSBundle mainBundle] pathForResource:htmlName ofType:@"htm"];
NSString* text = [NSString stringWithContentsOfFile:myHtmlFile encoding:NSUTF8StringEncoding error:nil];
[self.myWebView loadHTMLString:[NSString stringWithFormat:@"<html><body text=\"#000000\" face=\"Bookman Old Style, Book Antiqua, Garamond\" size=\"5\">%@</body></html>", text] baseURL: nil];
I don't have any experience in javascript so if you can simplify your answer, it would be very helpful. 我没有使用javascript的经验，因此，如果您可以简化答案，那将非常有帮助。
2 个解决方案
解决方案1
1 已采纳 2015-04-20 08:33:16
What I have noticed is that for changing the text color of an already loaded html file, using the following code is better as it doesn't cause the webview to reload. 我注意到的是，对于更改已经加载的html文件的文本颜色，使用以下代码会更好，因为它不会导致重新加载Webview。 But what worth noting is that this code only worked for me when changing an already loaded html file. 但值得注意的是，此代码仅在更改已加载的html文件时才对我有用。
[_myWebView stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('body')[0].style.color =\"Black\""];
But when I wanted to change the text color of a new html file (being loaded), the following code worked better for me. 但是，当我想更改新的html文件的文本颜色（正在加载）时，以下代码对我来说效果更好。
NSString * myHtmlFile = [[NSBundle mainBundle] pathForResource:htmlName ofType:@"htm"];
NSString* text = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
NSLog(@"%@",htmlFile);
[self.myWebView loadHTMLString:[NSString stringWithFormat:@"<html><body text=\"#000000\" face=\"Bookman Old Style, Book Antiqua, Garamond\" size=\"5\">%@</body></html>", text] baseURL: nil];
解决方案2
-1 2015-04-18 12:36:27
当您添加标签时，这意味着webview会将其视为新页面并重新加载，您可以使用javascript或jQuery实现您的任务：）
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