编译器出错的问题：
1. Unsupported compiler 'com.apple.compilers.llvmgcc42' selected for architecture 'armv7'
解决方法：
Change your compiler for C/C++/ObjectiveC Go to Build Settings->Build OPtions->compiler for C/C++/ObjectiveC; select Default(Apple LLVM5.0)
2. Assertion failure in -[UIApplication _runWithMainScene:transitionContext:completion:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3491.2.5/UIApplication.m:3173
报错内容
如果还有报错在AppDelegate中
didFinishLaunchingWithOptions
定义一个空UIViewController即可，添加如下代码解决：
UIViewController *emptyView = [[UIViewController alloc ]initWithNibName:nil bundle:nil];
self. window .rootViewController = emptyView;
SDK平台
