用xib自定义UIView并在代码中使用--iOS

首先新建一个空的xib文件:

将size改为freedom:

然后在xib中自定义视图(添加自己想要的其它视图):

要写好约束, 创建一个继承uiview的类和他关联,然后就可以调用了.

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //获得nib视图数组  

    NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"HeadView" owner:nil options:nil];
    // Find the view among nib contents (not too hard assuming there is only one view in it).
    // 得到最后一个view

    HeadView *headView = [nibContents lastObject];
    headView.frame = CGRectMake(0, 0, 300, 200);
    //headView.backgroundColor = [UIColor blueColor];
    _tableView.tableHeaderView = headView;
}