iOS 判断进入后台||是否跳转第三方

判断进入后台

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(xxx:)
                                                     name:UIApplicationWillEnterForegroundNotification object:nil];

是否跳转第三方

- (BOOL)webView :(UIWebView *)webView shouldStartLoadWithRequest :(NSURLRequest *)request navigationType :(UIWebViewNavigationType)navigationType {
    BOOL isHTTPOrLocalFile = [request.URL.scheme isEqualToString :@"http"] || [request.URL.scheme isEqualToString :@"https"] || [request.URL.scheme isEqualToString :@"file"];
    if (!isHTTPOrLocalFile) {
        _thirdApp = YES;
    }
    return YES;
}