如何处理UIVIew addsubview 不显示subview

老代码： addsubview不显示uilabel

-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section

{

    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0,0,tableView.frame.size.width,50)];

    UILabel *label=[[UILabel new]initWithFrame:CGRectMake(0, 0 ,200, 50)];

    label.text=@"加载更多...";

    label.textColor=[UserSetting getIntance].titleColor;

    label.backgroundColor=[UserSetting getIntance].titleColor;

    [view addSubview:label];

     [view setBackgroundColor:[UserSetting getIntance].mainColor];

    return view;

}

原因在于：addsubview 没有使 UILabel的大小生效

需要在addsuview后面再赋值frame.

新代码如下

-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section

{

    UIView *view = [[UIView alloc]     initWithFrame:CGRectMake(0,0,tableView.frame.size.width,50)];

    UILabel *label=[[UILabel new]init];

    label.text=@"加载更多...";

    label.textColor=[UserSetting getIntance].titleColor;

    label.backgroundColor=[UserSetting getIntance].titleColor;

    [view addSubview:label];

    label.frame=CGRectMake(0, 0 ,200, 50);

    [view setBackgroundColor:[UserSetting getIntance].mainColor];

    return view;

}