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問題：Development cannot be enabled while your device is locked.

剖析緣由：由於第一次銜接MAC時，在IOS設備上點擊了"不信任"選項，所以XCode 8不能訪問手機，所以才呈現這個問題

處理辦法：

英文好的同窗，可以看到原文章

http://stackoverflow.com/questions/26791477/xcode-device-locked-when-iphone-is-unlocked

以下我說下辦法

這是APPLE官網的解釋

https://support.apple.com/en-us/HT202778

重點是這段

Change your settings for trusted computers

Your IOS device remembers the computers you've chosen to trust.

If you don't want to trust a computer or other device anymore, change the privacy settings on your iPhone, iPad, or iPod touch: In IOS 8 or later, tap Settings > General > Reset > Reset Location & Privacy. Now when you connect to formerly trusted computers, the Trust alert will ask you whether you trust that computer.

意思是說重置隱私設置

點擊 設置 --> 通用 --> 重置 --> 重置地位和隱私

然後封閉xcode 8, 拔掉數據線，重啟xocde 8開啟項目， 重新插上數據線，此時手機上會顯示mac與手機設備的銜接訪問權限，選擇“信任”，

半途而廢了~~~

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