ios - 短信中的好友姓名？ ( objective-C )

Question

我正在制作一个应用程序，用户可以在其中发送带有预填电话号码的短信。 loadString、loadString2 和 loadString3 是用户可以填写并保存的 UITextFields 的字符串。但是，如果用户只填写一两个字段，留空一个，则收件人是所选的电话号码，以及一个名为 Buddy name 的联系人。

我的问题是，如何摆脱这个名为“Buddy name”的奇怪联系人？

我的代码:

if ([MFMessageComposeViewController canSendText])

{

    [controller setRecipients:[NSArray arrayWithObjects:loadString, loadString2, loadString3, nil]];
    [controller setBody:theLocation];
    [self presentViewController:controller animated:YES completion:NULL];

} else {        
    NSLog(@"Can't open text.");
}

Answer 1

“Buddy Name”显示数组是否包含一个字符串，该字符串不是像空字符串那样的有效联系人。仅将非空字符串添加到收件人数组中:

if ([MFMessageComposeViewController canSendText])
{
    NSMutableArray *recipents = [NSMutableArray array];
    if ([self isValidPhoneNumber:loadString]) {
         [recipents addObject:loadString];
    }
    if ([self isValidPhoneNumber:loadString2]) {
         [recipents addObject:loadString2];
    }
    if ([self isValidPhoneNumber:loadString3]) {
         [recipents addObject:loadString3];
    }
    [controller setRecipients:recipents];
    [controller setBody:theLocation];
    [self presentViewController:controller animated:YES completion:NULL];

} else {
    NSLog(@"Can't open text.");
}

...

- (BOOL)isValidPhoneNumber:(NSString *)phoneNumberString {
    // If the length is 0 it's invalid. You may want to add other checks here to make sure it's not invalid for other reasons.
    if (phoneNumberString.length == 0) {
        return NO;
    } else {
        return YES;
    }
}