一,效果图。
二,代码。
RootViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view. //电话号码
UILabel *telLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 200, 20)];
telLabel.textColor = [UIColor grayColor];
telLabel.text = @"13793333281";
//字符串的截取
NSString *string = [telLabel.text substringWithRange:NSMakeRange(4,4)];
//字符串的替换
telLabel.text = [telLabel.text stringByReplacingOccurrencesOfString:string withString:@"----"];
[self.view addSubview:telLabel];
}