UItextField 手机号切割

用这个 UIControlEventEditingChanged 事件绑定

#pragma  mark - textField -代理
- (void)textFieldDidChange:(UITextField *)text
{
    NSLog(@"%@",text.text);
    NSString * str = [text.text stringByReplacingOccurrencesOfString:@" " withString:@""];
    if (str.length >3&&text.text.length >3) {
        text.text = [NSString stringWithFormat:@"%@ %@",[str substringWithRange:NSMakeRange(0, 3)],[str substringWithRange:NSMakeRange(3,str.length - 3)]];
    }
    if (text.text.length == 4 &&str.length ==3) {
        text.text = [NSString stringWithFormat:@"%@",[str substringWithRange:NSMakeRange(0, 3)]];
    }
    if (str.length >7&&text.text.length >7) {
        text.text = [NSString stringWithFormat:@"%@ %@",[text.text substringWithRange:NSMakeRange(0, 8)],[text.text substringWithRange:NSMakeRange(8, text.text.length - 8)]];
    }
    if (str.length >11) {
        text.text = [text.text substringWithRange:NSMakeRange(0, 13)];
    }
//    if (text.text.length == 8 &&str.length ==7) {
//        text.text = [NSString stringWithFormat:@"%@",[str substringWithRange:NSMakeRange(0, 7)]];
//    }
}