Xcode，只檢索地址簿姓氏與字母A（等等）

Question

我無法檢索我的地址簿的姓氏。我只想通過字母表中的每個字母來檢索姓氏。

這是我的代碼至今

ABAddressBookRef addressBook = ABAddressBookCreate(); 
totalPeople = (__bridge_transfer NSMutableArray *)ABAddressBookCopyArrayOfAllPeople(addressBook); 

NSString *aString = @"A"; 

for(int i =0;i<[totalPeople count];i++){ 
    ABRecordRef thisPerson = (__bridge ABRecordRef) 
    [totalPeople objectAtIndex:i]; 
    lastName = (__bridge_transfer NSString *) ABRecordCopyValue(thisPerson, kABPersonLastNameProperty); 
} 

我不知道以後該怎麼辦，謝謝你看這個。

現在就是這個樣子

ABAddressBookRef addressBook = ABAddressBookCreate(); 
totalPeople = (__bridge_transfer NSMutableArray *)ABAddressBookCopyArrayOfAllPeople(addressBook); 

NSString *aString = @"A"; 

for(int i =0;i<[totalPeople count];i++){ 
    ABRecordRef thisPerson = (__bridge ABRecordRef) 
    [totalPeople objectAtIndex:i]; 
    lastName = (__bridge_transfer NSString *) ABRecordCopyValue(thisPerson, kABPersonLastNameProperty); 

    NSString *firstLetterOfCopiedName = [lastName substringWithRange: NSMakeRange(0,1)]; 
    if ([firstLetterOfCopiedName compare: aString options: NSCaseInsensitiveSearch] == NSOrderedSame) { 
     //This person's last name matches the string aString 
     aArray = [[NSArray alloc]initWithObjects:lastName, nil]; 
    } 

} 

它onlys增加了一個名字到陣列中，我應該怎麼才能做補充說明了一切。 對不起，我是相當新的ios開發！

Answer 1

您可以使用類似的東西，並將結果存儲在數組中或返回結果。 （未測試）

NSString *firstLetterOfCopiedName = [lastName substringWithRange: NSMakeRange(0,1)]; 
if ([firstLetterOfCopiedName compare: aString options: NSCaseInsensitiveSearch] == NSOrderedSame) { 
    //This person's last name matches the string aString 
} 

您需要ALLOC環路（否則將只包含一個對象）外的數組，數組也必須是一個NSMutableArray（因此它可以被修改）。這裏是一個例子：

ABAddressBookRef addressBook = ABAddressBookCreate(); 
totalPeople = (__bridge_transfer NSMutableArray*)ABAddressBookCopyArrayOfAllPeople(addressBook); 

NSString *aString = @"A"; 

//This is the resulting array 
NSMutableArray *resultArray = [[NSMutableArray alloc] init]; 

for(int i =0;i<[totalPeople count];i++){ 
    ABRecordRef thisPerson = (__bridge ABRecordRef) 
    [totalPeople objectAtIndex:i]; 
    lastName = (__bridge_transfer NSString *) ABRecordCopyValue(thisPerson, kABPersonLastNameProperty); 

    NSString *firstLetterOfCopiedName = [lastName substringWithRange: NSMakeRange(0,1)]; 
    if ([firstLetterOfCopiedName compare: aString options: NSCaseInsensitiveSearch] == NSOrderedSame) { 
     //This person's last name matches the string aString 
     [resultArray addObject: lastName]; 
    } 

} 

//print contents of array 
for(NSString *lastName in resultArray) { 
    NSLog(@"Last Name: %@", lastName); 
}