iPhone - webViewDidFinishLoad 未调用
我有一个简单的 IB 视图，其中仅包含一个 UIWebView 和一个 UIButton。
webView 被保留，连接，而不是 nil，委托属性 os 也被连接，控制器是 UIWebViewDelegate 兼容并在 .h.
在 ViewDidLoad 中，我使用 [self.webView loadHTMLString:htmlContent baseURL:nil];
内容加载，但 webViewDidFinishLoad 永远不会触发，didFailLoadWithError 和 webViewDidStartLoad 都不会触发。
我如何知道我的内容何时完成加载，因为它需要很短的时间，但仍然需要加载时间（并且我需要在显示期间执行一些操作，例如不显示按钮） ？
@interface MyController : UIViewController <UIWebViewDelegate> {
UIWebView* webView;
}
@property (nonatomic, retain) IBOutlet UIWebView* webView;
@end
@implementation MyController
@synthesize webView;
- (void)viewDidLoad
{
[super viewDidLoad];
constructing the htmlString
id a = self.webView.delegate; // for debug
[self.webView loadHTMLString:htmlContent baseURL:nil];
}
@end
编辑： 我已经删除了整个 XIB 并从 scrathc 构建了它：不再有问题。 IB有时很糟糕。
I have a simple View into IB that contains just a UIWebView and a UIButton.
The webView is retained, connected, not nil, the delegate property os also connected, the Controller is UIWebViewDelegate compliant and set in the .h.
in ViewDidLoad, I use [self.webView loadHTMLString:htmlContent baseURL:nil];
The content loads, but webViewDidFinishLoad is never triggered, neither didFailLoadWithError, neither webViewDidStartLoad.
How can I know when my content has finished loading, as it take a short time, but still a time to load (and I need to do things during that time on display, for an example not showing the button) ?
@interface MyController : UIViewController <UIWebViewDelegate> {
UIWebView* webView;
}
@property (nonatomic, retain) IBOutlet UIWebView* webView;
@end
@implementation MyController
@synthesize webView;
- (void)viewDidLoad
{
[super viewDidLoad];
constructing the htmlString
id a = self.webView.delegate; // for debug
[self.webView loadHTMLString:htmlContent baseURL:nil];
}
@end
EDIT :
I've deleted the whole XIB and built it from scrathc : no more problem. IB sucks sometimes.
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您需要在类中实现
UIWebViewDelegate协议并设置self.webView = self的委托属性。您需要为该类实现非可选委托方法，以及webViewDidFinishLoad、didFailLoadWithError和webViewDidStartLoad方法。You need to implement the
UIWebViewDelegateprotocol in your class and set the delegate property ofself.webView = self. You will need to implement non-optional delegate methods to the class, plus thewebViewDidFinishLoad,didFailLoadWithErrorandwebViewDidStartLoadmethods.我已经删除了整个 XIB 并从头开始重新构建它：不再有问题。 IB有时很糟糕。
I've deleted the whole XIB and built it again from scratch : no more problem. IB sucks sometimes.
只是一种黑暗中的刺伤。就上面的代码而言，您仍然没有将响应对象设置为 webView 委托，您已经设置了一个指向 webView 委托对象的指针，但是当 webView 去响应委托时，它仍然为零。
你可能应该有： self.webView.delegate = a;但即便如此，我也不知道这是否有效，因为我不知道 a 是什么，它是响应委托回调的对象吗？
Just a sort of stab in the dark. As far as your code above is concerned, you still haven't set the responding object to the webView delegate, you have set a pointer to the webView delegate object but when the webView goes to respond to the delegate it will still be nil.
You should probably have: self.webView.delegate = a; but even then I don't know if that will work because I don't know what a is, is it the object that will respond to the delegate call backs?
您必须在类中实现 UIWebViewDelegate 协议并设置 self.webView.delegate=self;
You have to implement the
UIWebViewDelegateprotocol in your class and setself.webView.delegate=self;