通过xib创建View

1 创建一个xib并使之与一个自定义的View相关联

2 在自定义的View中参考如下代码：

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        // Initialization code.
        //MyView is xib name
        [[NSBundle mainBundle] loadNibNamed:@"MyView" owner:self options:nil];
        [self addSubview:self.view];
    }
    return self;
}

参考：http://stackoverflow.com/questions/5056219/uiview-and-initwithframe-and-a-nib-file-how-can-i-get-the-nib-file-loaded

http://blog.csdn.net/yu413854285/article/details/7734198

http://nscookbook.com/2013/01/recipe-6-creating-a-custom-uiview-using-a-nib/