IOS成长之路-Xcode cannot run using the selected device. 解决办法

1.重启(当然这种方法一般情况下不管用)

2. 查看证书是否是正确的

3.PROJECT --> Info --> Deployment Target --> IOS Deployment Target  里面的值 要设置为  <=真机系统版本

   TARGETS --> Summary --> IOS Application Target --> Deployment Target  里面的值 要设置为 <=真机系统版本

  也要查看一下这两个是否正确

  PROJECT --> Build Settings --> Deployment --> IOS Deployment Target  

  TARGETS --> Build Settings --> Deployment --> IOS Deployment Target 

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