You've implemented -[ application:didReceiveRemoteNotification:fetchCompletio

**[1412:60b] You've implemented -[ 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 -[ 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