如何在objective-c iphone sdk中迭代嵌套字典

- (void)iterateNestedDictionary:(NSDictionary *)dictionary {
    for (id key in dictionary) {
        id value = [dictionary objectForKey:key];
        if ([value isKindOfClass:[NSDictionary class]]) {
            NSLog(@"Key: %@, Value: %@", key, value);
            [self iterateNestedDictionary:value];
        } else {
            NSLog(@"Key: %@, Value: %@", key, value);
        }
    }
}

NSDictionary *nestedDictionary = @{
    @"key1": @"value1",
    @"key2": @{
        @"key3": @"value3",
        @"key4": @{
            @"key5": @"value5"
        }
    },
    @"key6": @"value6"
};

[self iterateNestedDictionary:nestedDictionary];

Key: key1, Value: value1
Key: key3, Value: value3
Key: key5, Value: value5
Key: key6, Value: value6