Terminating app due to uncaught

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.