[Code Note] replace the four digits in the middle of the phone number with the-number and the four digits in the phone number

[Code Note] replace the four digits in the middle of the phone number with the-number and the four digits in the phone number

I ,.

Ii. Code.

RootViewController. m

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
//Phone number
UILabel *telLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 200, 20)];
telLabel.textColor = [UIColor grayColor];
telLabel.text = @"13793333281";
//String truncation
NSString *string = [telLabel.text substringWithRange:NSMakeRange(4,4)];
//String replacement
telLabel.text = [telLabel.text stringByReplacingOccurrencesOfString:string withString:@"----"];
[self.view addSubview:telLabel];
}