iOS UILabel根据内容自动调整高度
时间：2020-11-07 22:05:33 | 栏目：iOS代码 | 点击：次
一.效果图
二.代码
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
//根据内容自动调整高度
NSString *str = @"公元前3000年，印度河流域的居民的数字使用就已经比较普遍，居民们采用了十进位制的计算法。";
UIFont *font = [UIFont systemFontOfSize:13];
CGSize size = CGSizeMake(200,2000);
CGRect labelRect = [str boundingRectWithSize:size options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading) attributes:[NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName] context:nil];
//UILabel
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(50,100, labelRect.size.width, labelRect.size.height)];
label.text = str;
label.backgroundColor=[UIColor redColor];
label.font = [UIFont systemFontOfSize:13];
label.numberOfLines=0;
[self.view addSubview: label];
}