如何從數組中刪除對象，數組包含字典

我在數組一樣，存儲數據..如何從數組中刪除對象，數組包含字典

while ([delegate_obj.Recordsetmaster next]) 
    { 
    NSMutableDictionary *local_DICT = [NSMutableDictionary new]; 

    NSString *str_id = [delegate_obj.Recordsetmaster stringForColumn:@"category_id"]; 
    [local_DICT setObject:str_id forKey:@"category_id"]; 

    NSString *str_name = [delegate_obj.Recordsetmaster stringForColumn:@"category_name"]; 
    [local_DICT setObject:str_name forKey:@"category_name"]; 

    NSString *str_status = [delegate_obj.Recordsetmaster stringForColumn:@"status"]; 
    [local_DICT setObject:str_status forKey:@"status"]; 

    NSString *str_image = [delegate_obj.Recordsetmaster stringForColumn:@"image"]; 
    [local_DICT setObject:str_image forKey:@"image"]; 

    [category_array addObject:local_DICT]; 
    }

現在我想刪除陣列5索引值如何做到這一點？

來源

2015-10-07 Karuppasamy Pandian

從'category_array'？ – Paulw11

[category_array removeObjectAtIndex：3];它會崩潰。 –

總是一個最佳實踐 - 在刪除特定索引上的項目之前，檢查'category_array'的大小。而且，無論您迄今爲止顯示的任何代碼如何，您都需要檢查執行「while」循環的次數，因爲這將控制您的數組大小。 – Abhinav

我認爲它只是[NSMutableArray removeObjectAtIndex:]，但是我也想提供一個更直觀的實現你的代碼：

NSDictionary *keys = @{ @"category_id", @"category_name", @"status", @"image" }; 
while ([delegate_obj.Recordsetmaster next]) 
{ 
    NSMutableDictionary *local_DICT = [NSMutableDictionary new]; 
    for (NSString *key in keys) { 
     id value = [delegate_obj.Recordsetmaster stringForColumn:key]; 
     NSAssert(value, @"No value for '%@'", key); 
     [local_DICT setObject:id forKey:key]; 
    } 
    [category_array addObject:local_DICT]; 
}

來源

2015-10-07 11:40:14 Droppy

如何從數組中刪除對象，數組包含字典

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