1》Images.xcassets: A 60x60@2x app icon is required for iPhone apps targeting iOS 7.0 and later

图片像素过低编译器警告 不影响使用

2》Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<DJMessage 0x7fe7a8dac5d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key type.

枚举类型不需要 *号   定义成员变量忘记加*的失误

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