Xcode 问题The identity used to sign the executable is no longer valid

iOS 真机调试出现：“Please verify that your device’s clock is properly set, and that your signing certificate is not expired.如图1

图1

1.去Xcode ->preferences-> View details,在signing identities中点击Reset,如图2

图2

2.去钥匙串中删除过期证书,如图3

图3

3,检查Provisioning profile设置是否有误,我一般设置为Automatic,如图4

图4

然后重新插入手机,点击fix issue,重新生成证书即可.