这是nsdictionary的奇怪问题

Question

这是代码。

self.names = [[NSMutableDictionary alloc] init]; 
NSMutableDictionary *mainDict = [[NSMutableDictionary alloc] init]; 
NSMutableArray *subArray = [[NSMutableArray alloc] init]; 
NSMutableArray *arrayOfKeys = [[NSMutableArray alloc] init]; 
NSMutableDictionary *bufDict = [[NSMutableDictionary alloc] init]; 
NSString *bufStr; 
NSString *newKeyStr; 
NSString *oldKeyStr; 
oldKeyStr = @""; 
newKeyStr = oldKeyStr; 
NSLog(@"start making NEW format"); 
for (int i=0; i < [temp count]; i++) 
    { 
     //if (!(bufDict == nil)) [bufDict removeAllObjects]; 
     bufDict = [temp objectAtIndex:i]; 
     bufStr = [bufDict objectForKey:kNameKey]; 
     if ([bufStr length]>=2) 
     {     
      if ([newKeyStr isEqualToString:oldKeyStr]) 
       {       
       } 
      else 
       [arrayOfKeys addObject:newKeyStr]; 
      oldKeyStr = newKeyStr; 
     } 
    } 

int x=0; 
for (int i = 0; i< [arrayOfKeys count];i++) 
    { 
     newKeyStr = [arrayOfKeys objectAtIndex:i]; 
     for (int j=x; j< [temp count]; j++) 
     { 
      bufDict = [temp objectAtIndex:j]; 
      bufStr = [bufDict objectForKey:kNameKey]; 
      if ([bufStr length] >=2) 
      { 
       oldKeyStr = [bufStr substringToIndex:1]; 
       if ([oldKeyStr isEqualToString:newKeyStr]) 
        { 
         [subArray addObject:bufDict]; 
        } 
       else 
        { 
         NSLog(@"newKEyStr setting to mainDict is %@",newKeyStr); 
         [mainDict setObject:subArray forKey:newKeyStr]; 
         [self.names setObject:subArray forKey:newKeyStr]; 
         NSArray *arr= [self.names objectForKey:newKeyStr]; 
         NSLog(@"array count: %i",[arr count]); 
         [subArray removeAllObjects]; 
         x=j; 
         break; 
        } 
      } 

     } 
    } 

    NSLog(@"end of making format dict!!!"); 
    [mainDict release]; 
    self.keys = arrayOfKeys; 
    [arrayOfKeys release]; 
    [subArray release]; 
    [bufDict release]; 

    for (int v = 0 ; v< [keys count];v++) 
    { 
     NSString *str = [keys objectAtIndex:v]; 
     NSLog(@"str = %@",str); 
     NSArray *arr = [self.names objectForKey:str]; 
     NSLog(@"arr= %i",[arr count]); 
    } 

所以我的日志

  start making NEW format 
newKEyStr setting to mainDict is 1 
array count: 1 
newKEyStr setting to mainDict is 2 
    array count: 22 
    newKEyStr setting to mainDict is 3 
    array count: 2 
    newKEyStr setting to mainDict is A 
    array count: 12 
    newKEyStr setting to mainDict is B 
    array count: 16 
    newKEyStr setting to mainDict is C 
    array count: 33 
    newKEyStr setting to mainDict is D 
    array count: 6 
    newKEyStr setting to mainDict is E 
    array count: 9 
    newKEyStr setting to mainDict is F 
    array count: 6 
    newKEyStr setting to mainDict is G 
    array count: 5 
    newKEyStr setting to mainDict is H 
    array count: 17 
    newKEyStr setting to mainDict is I 
    array count: 3 

    end of making format dict!!! 
    str = 1 
    arr= 1 
    str = 2 
    arr= 1 
    str = 3 
    arr= 1 
    str = A 
    arr= 1 
    str = B 
    arr= 1 
    str = C 
    arr= 1 
    str = D 
    arr= 1 
    str = E 
    arr= 1 
    str = F 
    arr= 1 
    str = G 
    arr= 1 
    str = H 
    arr= 1 
    str = I 
    arr= 1 

正如你可以看到它看起来像我在nsarrays但最终以阵列的NSDictionary self.names有一些nsdictionaries当我要检查日志说nsarray中只有一个对象。有人能帮助我吗？ 对不起，但我无法解决问题几个小时。谢谢你

Answer 1

所以我和我的朋友谈过，他帮助了我。这里是正确的代码！

NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; 
    for(NSDictionary *item in self.temp) 
    { 
     NSString *name = [item objectForKey:@"name"]; 
     if ([name length] > 1) 
     { 
      NSString *firstLetter = [[name substringToIndex:1] uppercaseString]; 
      NSMutableArray *itemArray = [dict objectForKey:firstLetter]; 
      if(!itemArray) 
      { 
       itemArray = [NSMutableArray array]; 
       [dict setObject:itemArray forKey:firstLetter]; 
      } 
      [itemArray addObject:item]; 
     } 
    }