从didReceiveRemoteNotification调用的第一个HTTP请求始终失败

I receive a simple remote notification and handle it like this:

我收到一个简单的远程通知,并按如下方式处理:

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
    let notificationObject = JSON(userInfo)

    if notificationObject["type"] == "friendRequest" {
        let tab = self.window?.rootViewController as! UITabBarController
        tab.selectedIndex = 1
    }
}

When opened, the push notification presents a ViewController that manages a subclassed UITableView and UITableViewCell.

打开时,推送通知会显示一个ViewController,用于管理子类UITableView和UITableViewCell。

The UITableViewCell makes a network call for each cell to Google API as follows:

UITableViewCell为Google API的每个单元格进行网络调用,如下所示:

let url = "https://www.googleapis.com/books/v1/volumes?q=\(isbn)&fields=items(volumeInfo(imageLinks(thumbnail),industryIdentifiers))&key=\(GOOGLE_BOOKS_API_KEY)"

    Alamofire.request(.GET, url).response { response in
        print(response)

The calls for each cell succeed except for the first one, which gives me:

每个单元格的调用成功除了第一个单元格,这给了我:

Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost.

Are there any iOS limitations/delays/interference for network calls on launch?

在发布时网络呼叫是否有iOS限制/延迟/干扰?

1 个解决方案

#1

I have noticed that sometimes you need to make little delay before performing certain things that fail, in case you execute them immediately.

我注意到有时你需要在执行某些失败的事情之前稍微延迟,以防你立即执行它们。

Before calling a method, that starts building a UITableView and corresponding cells, wrap the method call into dispatch_after block, with delay of 0.1 seconds, which should be sufficient.

在调用方法之前,开始构建UITableView和相应的单元格,将方法调用包装到dispatch_after块中,延迟为0.1秒,这应该足够了。

This should solve your problem with the first cell. In case this helps, you can experiment with delay, trying to make it even shorter.

这应该可以解决第一个单元格的问题。如果这有帮助,您可以尝试延迟,尝试使其更短。

#1