iOS UITextFile手机号码限制11位和粘贴冲突解决办法

 [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(posted:) name:UIMenuControllerDidShowMenuNotification object:nil];

- (void)posted:(NSNotification*)noti{
    if (noti.object) {
        self.phoneTf.text = @"";
        UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
        NSString *pasteStr = pasteboard.string;
        NSString *resStr = [pasteStr stringByReplacingOccurrencesOfString:@" " withString:@""];
        self.phoneTf.text = resStr;
    }
}