下载最新的iOS项目工程（3.5.3），添加FCM相关模块，编译报错如下：
file:///Users/dcloud/srv/io.dcloud.package/ios/complier/src/libPDRCore/libPDRCore/Managers/PDRCoreAppFrame.m: runtime: UI API called from background thread: -[UIView alpha] must be used from main thread only
file:///Users/dcloud/srv/io.dcloud.package/ios/complier/src/libPDRCore/libPDRCore/Managers/PDRCoreAppFrame.m: runtime: UI API called from background thread: -[UIView frame] must be used from main thread only
file:///Users/dcloud/srv/io.dcloud.package/ios/complier/src/libUI/libUI/PGUi.mm: runtime: UI API called from background thread: -[UIView initWithFrame:] must be used from main thread only
