iOS中的UILabel控件

 1 //文本标签
 2     UILabel *label = [[UILabel alloc]init];
 3     label.frame = CGRectMake(10, 100, 355, 300);
 4     label.backgroundColor = [UIColor yellowColor];
 5     //文本
 6     label.text = @"Hello.iOSghuirhgoireghoieughsiuhgfsuidhgiusfdghfidsughfdiushvdfisubvusfhjifohweuhfueoighreugh";
 7     //文字布局模式
 8     label.textAlignment = NSTextAlignmentCenter;
 9     //文字颜色
10     /*
11      clearColor - 透明色
12      */
13     label.textColor = [UIColor colorWithRed:0.24 green:0.12 blue:0.51 alpha:1];
14     //label.alpha = 0.5;
15     //字体的设置
16     label.font = [UIFont systemFontOfSize:25];
17     //字体的加粗或者倾斜
18     label.font = [UIFont boldSystemFontOfSize:25];
19     label.font = [UIFont italicSystemFontOfSize:25];
20     for (NSString *name in [UIFont familyNames]) {
21         NSLog(@"%@",name);
22     }
23     label.font = [UIFont fontWithName:@"Bodoni 72 Oldstyle" size:25];
24     //设置阴影
25     label.shadowColor = [UIColor redColor];
26     label.shadowOffset = CGSizeMake(-1,-1);
27     //1.label要有足够的大小
28     //2.设置换行模式
29     label.lineBreakMode = NSLineBreakByWordWrapping;
30     //3.设置显示的行数(0可以不限制行数)
31     label.numberOfLines = 0;
32     //**根据字符串大小计算label的大小
33     CGSize size = [label.text sizeWithFont:label.font constrainedToSize:CGSizeMake(355, 10000) lineBreakMode:NSLineBreakByCharWrapping];
34     label.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y, label.frame.size.width, size.height);
35      [self.view addSubview:label];