IOS 奇妙的Code

Class xyzClass;
xyzClass = [UIView class];
[[xyzClass alloc] init];

#if TARGET_OS_IPHONE
    #define XColor UIColor
#elif TARGET_OS_MAC
    #define XColor NSColor
#endif

XColor *grayColor = [XColor darkGrayColor];

- (void) setup{
    NSString *nibName = NSStringFromClass([self class]);

    //Bundle Identifier can be find at Target -> Your Framework -> Bundle Identifier
    //NSBundle *bundle = [NSBundle bundleWithIdentifier:@"com.yume190.CustomViewObjc"];

    UINib *nib = [UINib nibWithNibName:nibName bundle:[NSBundle mainBundle]];
    [nib instantiateWithOwner:self options:nil];
    //Add the view loaded from the nib into self.
    [self addSubview:self.view];
}

@property (nonatomic, strong) UIView *customInterface;

-(instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{
    self = [super initWithNibName:nibNameOrNil bundle:nil];
    if (self) {
        //YumeKeyBoard.xib
        UINib *nib = [UINib nibWithNibName:@"YumeKeyBoard" bundle:nil];
        NSArray *objects = [nib instantiateWithOwner:self options:nil];
        _customInterface = [objects firstObject];
    }
    return self;
}