1.给webview添加KVO 检测，因为当前页跳转webview回调方法不能检测到跳转
[self.webView addObserver:self forKeyPath:canGoBackKeyPath options:NSKeyValueObservingOptionNew context:nil];
2.监测方法实现
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context
{
if ([keyPath isEqualToString:canGoBackKeyPath])
{
NSLog(@"URL------%@---%d",_webView.URL.absoluteString,self.webView.canGoBack);
if (self.webView.canGoBack == TRUE)
{
[self leftGesture:NO];
}
else
{
[self leftGesture:YES];
}
}
}
3.添加webview右滑手势禁用可用，falg：NO 不可用 YES 可用
-(void)leftGesture:(BOOL)falg
{
//禁用屏幕左滑返回手势
if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)])
{
self.navigationController.interactivePopGestureRecognizer.enabled = falg;
}
}
4.pragma mark 右滑手势事件
- (void)willMoveToParentViewController:(UIViewController *)parent
{
[super willMoveToParentViewController:parent];
if (parent == nil)
{
[self da_navigationControllerShouldPopOnBackButton];
}
}
5.调用webview goBack
- (BOOL)da_navigationControllerShouldPopOnBackButton
{
if (self.webView.canGoBack) {
[self.webView goBack];
return NO;
} else {
return YES;
}
}
