iOS CUICatalog: Invalid asset name supplied: (null)

iOS開發出現CUICatalog: Invalid asset name supplied: (null), or invalid scale factor: 2.000000 原因： 你用 ...

iOS no visible @interface for 'UIButton' declares the selector errors

no visible @interface for 'UIButton' declares the selector errors 原理不是特別理解，通過清理緩存，代碼更新了，Xcode還是 ...