#import <Foundation/Foundation.h>


int main(int argc, const char * argv[])
{

    @autoreleasepool {

        //創(chuàng)建字典
        NSDictionary *dic1 = [NSDictionary dictionaryWithObject:@"value" forKey:@"key"];
        NSLog(@"dic1 :%@", dic1);
        
        
        //創(chuàng)建多個字典
        NSDictionary *dic2 = [NSDictionary dictionaryWithObjectsAndKeys:
                              @"value1", @"key1",
                              @"value2", @"key2",
                              @"value3", @"key3",
                              @"value4", @"key4",
                              nil];
        NSLog(@"dic2 :%@", dic2);
        
        
        //根據現(xiàn)有的字典創(chuàng)建字典
        NSDictionary *dic3 = [NSDictionary dictionaryWithDictionary:dic2];
        NSLog(@"dic3 :%@", dic3);
        
        
        //根據key獲取value
        NSLog(@"key3 value :%@", [dic3 objectForKey:@"key3"]);
        
        //獲取字典數量
        NSLog(@"dic count :%d", dic3.count);
        
        //所有的鍵集合
        NSArray *keys = [dic3 allKeys];
        NSLog(@"keys :%@", keys);
        
        //所有值集合
        NSArray *values = [dic3 allValues];
        NSLog(@"values :%@", values);
        
        
        
        NSMutableDictionary *mutableDic = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
                                           @"mvalue1", @"mkey1",
                                           @"mvalue2", @"mkey2", nil];
        //添加現(xiàn)有的字典數據
        [mutableDic addEntriesFromDictionary:dic3];
        NSLog(@"mutableDic :%@",mutableDic);
        
        //添加新的鍵值對象
        [mutableDic setValue:@"set1" forKey:@"setKey1"];
        NSLog(@"set value for key :%@",mutableDic);
        
        //以新的字典數據覆蓋舊的字典數據
        [mutableDic setDictionary:dic2];
        NSLog(@" set dictionary :%@",mutableDic);
        
        //根據key刪除value
        [mutableDic removeObjectForKey:@"key1"];
        NSLog(@"removeForkey :%@",mutableDic);
        
        //快速遍歷
        for(id key in mutableDic) {
            NSLog(@"key :%@  value :%@", key, [mutableDic objectForKey:key]);
        }
        
        //枚舉遍歷
        NSEnumerator *enumerator = [mutableDic keyEnumerator];
        id key = [enumerator nextObject];
        while (key) {
            NSLog(@"enumerator :%@", [mutableDic objectForKey:key]);
            key = [enumerator nextObject];
        }
        
        
        //根據key數組刪除元素
        [mutableDic removeObjectsForKeys:keys];
        NSLog(@"removeObjectsForKeys :%@",mutableDic);
        
        [mutableDic removeAllObjects];
        //刪除所有元素
        NSLog(@"remove all :%@", mutableDic);
    }
    return 0;
}