將字典分成兩個字典

Question

我有一本字典。對於例如wholeDict。 ，其中不包含。的字典。我想創建兩個詞典，說dict1 & dict2包含等於no。來自wholeDict的字典。在目標-c如何執行此操作？任何人有解決辦法 在此先感謝。

Answer 1

大概有幾個方法可以做到這一點，但一個選項是枚舉「整體」和備用哪個字典您將追加到：

- (void)splitDicts 
{ 
    // This is just me creating sample data for the "whole" dictionary. 
    NSMutableDictionary *whole = [[NSMutableDictionary alloc] init]; 
    for (int i = 0; i < 10; i++) 
    { 
     NSString *key = [NSString stringWithFormat:@"%d", i]; 
     NSString *value = [NSString stringWithFormat:@"Valus is %d", i]; 
     whole[key] = value; 
    } 

    NSMutableDictionary *dict1 = [[NSMutableDictionary alloc] init]; 
    NSMutableDictionary *dict2 = [[NSMutableDictionary alloc] init]; 
    __block BOOL addToDict1 = YES; 

    [whole enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) { 
     if (addToDict1) 
     { 
      dict1[key] = obj; 
     } 
     else 
     { 
      dict2[key] = obj; 
     } 
     addToDict1 = !addToDict1; 
    }]; 
}