UILabel属性

UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(30, 30, 100, 300)];

label.text = @"jvhhhhhhhhhhhhhhuuuuuuuuuvttttttttt";

//设置label的边框宽度

label.layer.borderWidth = 4;

//圆角

label.layer.cornerRadius = 30;

label.layer.masksToBounds = YES;

label.font = [UIFont systemFontOfSize:40];

//换行，0表示无限行

label.numberOfLines = 0;

//label.enabled = NO;//是否激活

label.tag = 1;

label.textAlignment = NSTextAlignmentLeft;

[self.view addSubview:label];

//改变其文本内容

[self setLabelText];

}

-(void)setLabelText{

UILabel *label = (UILabel *)[self.view viewWithTag:1];

label.text = @"新文本";

}