替换电话号码中间4位为"-"号

这个效果的实现很简单，首先截取需要替换成＊号的内容，然后再进行替换

 

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//电话号码     UILabel *telLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, yy+30, 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];