如果canGoBack
为true,则在Web视图中显示后退按钮。
它可以正常工作,但是对于一个特定的网页,即使没有后退页面,webview表示cangoback为true,而cangoback应该为false。
更新资料
这是初始化我的webview的代码片段
-(void)initWebView{
WKUserContentController* userContentController = WKUserContentController.new;
NSString* documentCookie = [self documentCookie];
WKUserScript * cookieScript = [[WKUserScript alloc]
initWithSource: documentCookie
injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:NO];
// again, use stringWithFormat: in the above line to inject your values programmatically
[userContentController addUserScript:cookieScript];
WKWebViewConfiguration* webViewConfig = WKWebViewConfiguration.new;
webViewConfig.userContentController = userContentController;
self.webviewObj = [[WKWebView alloc] initWithFrame:CGRectMake(self.vuParent.frame.origin.x, self.vuParent.frame.origin.y, self.vuParent.frame.size.width, self.vuParent.frame.size.height) configuration:webViewConfig];
self.webviewObj.UIDelegate = self;
[self.webviewObj setBackgroundColor:[UIColor whiteColor]];
self.webviewObj.translatesAutoresizingMaskIntoConstraints=false;
[self.vuParent addSubview:self.webviewObj];
}
这是我如何在Webview中加载请求
-(void)completeWebRequest
{
NSString* urlToRequestStr = @"";
if ([[self targetUrl] length]) {
urlToRequestStr = [self targetUrl];
}
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString: urlToRequestStr]];
if (self.isPOST) {
NSMutableData *body = [[NSMutableData alloc] initWithData:[self.postParams dataUsingEncoding:NSUTF8StringEncoding]];
NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[body length]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:body];
}
[self initWebView];
self.webviewObj.scrollView.scrollEnabled=false;
[self.view setBackgroundColor:[UIColor whiteColor]];
[self.webviewObj setOpaque:false];
self.webviewObj.navigationDelegate = self;
[self setOriginalUrlToRequest:tempRequest];
[[self webviewObj] loadRequest:tempRequest];
}
这是我检查是否需要显示后退按钮的方法。
[self setBackButtonCheckTimer:[NSTimer timerWithTimeInterval:0.1 target:self selector:@selector(chkBackBtn) userInfo:nil repeats:true]];
- (void) chkBackBtn {
if ([[self webviewObj] canGoBack]) {
[[self navigationItem] setLeftBarButtonItem:[self bkButton]];
}
else{
[[self navigationItem] setLeftBarButtonItem:nil];
}
}
最佳答案
您可以使用一种方法来调试此类问题。
canGoBack方法基于backForwardList起作用。
您可以验证列表中的内容并进行更改。
关于ios - WkWebView Cangoback给出错误的结果,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/61139755/