Main|Main Thread Checker: UI API called on a background thread: -[UIApplication delegate]

运行提示这个错误:Main Thread Checker: UI API called on a background thread: -[UIApplication delegate]
【Main|Main Thread Checker: UI API called on a background thread: -[UIApplication delegate]】按照下图步骤可以解决


Main|Main Thread Checker: UI API called on a background thread: -[UIApplication delegate]
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