UILabel 简单创建

UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 30)];
    
    //文字对齐
    label.textAlignment = NSTextAlignmentCenter;
    //设置文字
    label.text = @"first";
    //固定位置
    label.center = self.view.center;
    //黏贴
    [self.view addSubview:label];