在使用iOS推送时，出现下面错误：
**[1412:60b] You've implemented -[<UIApplicationDelegate> application:performFetchWithCompletionHandler:], but you still need to
add "fetch" to the list of your supported UIBackgroundModes in your Info.plist.
**[1412:60b] You've implemented -[<UIApplicationDelegate> application:didReceiveRemoteNotification:fetchCompletionHandler:],
but you still need to add "remote-notification" to the list of your supported UIBackgroundModes in your Info.plist.
解决方法：PORJECT --> Capabilities --> Background Modes --> Background fetch & Remote notifications -->选中为on 状态
我还遇到一种情况
You've implemented -[<UIApplicationDelegate> application:didReceiveRemoteNotification:fetchCompletionHandler:], but you still need to add "remote-notification" to the list of your supported UIBackgroundModes in your Info.plist.
破解方法还 和上面是一样的，如图
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