xcode8 && swift3.0出現「expression of type UIViewController？is unused 」 warning
定製導航返回按鈕時，關聯的方法中：io
self.navigationController？.popViewController(animated: true)；這句出現警告方法
解決：im
self.navigationController!.popViewController(animated: true)將？改成！animate
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相關文章
- 1. The expression of type Integer is unboxed into int
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- 4. index.js:1375 Warning: A component is changing an uncontrolled input of type che
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- 8. Warning: Failed prop type: Invalid prop value of type number supplied to Textinput, expected string
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- 10. Warning: Failed prop type: Invalid prop `enablesReturnKeyAutomatically` of type `string` supplie