Question

我想使用UIWebView从我的iPhone应用程序执行javascript代码。

但是只有html部分正在执行而javascript部分没有执行。它也没有显示错误。

NSMutableString *htmlCode = [NSMutableString stringWithString:@"<!DOCTYPE HTML>"];


[htmlCode appendString:@"<html><head><tilte> sadaf </title>"];

[htmlCode appendString:@"<h1>My First Web Page</h1>"];


[ htmlCode appendString:@" <p id='demo'>This is a paragraph.</p>"];
[self.webView loadHTMLString:htmlCode baseURL:nil];


webView.delegate= self;

[webView stringByEvaluatingJavaScriptFromString:@"<script type='text/javascript'>document.getElementById('demo').innerHTML=Date();</script>   "];

Answer 1

如果您使用stringByEvaluatingJavaScriptFromString来评估JavaScript，那么您不需要将JavaScript代码包装在<script>标记中（事实上，这样做会阻止您的脚本执行）。试试这个：

[webView stringByEvaluatingJavaScriptFromString:@"document.getElementById('demo').innerHTML=Date();"];

Answer 2

检查委托是否设置正确。

- (void)viewDidLoad 
{
    [super viewDidLoad];

    //  init and create the UIWebView
    webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 88, 320, 400)]; 
    webView.autoresizesSubviews = YES;
    webView.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth);
    [webView  setDelegate:self];//set the web view delegates for the web view to be itself
    NSMutableString *htmlCode = [NSMutableString stringWithString:@"<!DOCTYPE HTML>"];

    [htmlCode appendString:@"<h1>My First Web Page</h1>"]; 
    [htmlCode appendString:@" <p id='demo'>This is a paragraph.</p>"]; 
    [htmlCode appendString:@"</form> </body> </html> "]; 
    [self.webView loadHTMLString:htmlCode baseURL:nil];

    [self.view addSubview:webView];//add the web view to the content view
}

- (void) webViewDidFinishLoad:(UIWebView *)webView1
{
    NSLog(@"webViewDidFinishLoad");
    [webView1 stringByEvaluatingJavaScriptFromString:@"alert('hi');document.getElementById('demo').innerHTML=Date();"];
}

这可能有所帮助！

Javascript没有在iPhone中执行

2 个答案: