C++/CX迭代Map <String ^,Object ^> ^的方式？

Question

我有一个类型的对象Map<String^, Object^>^.如何以C++/CX方式迭代？我试图使用迭代器,但我不清楚语法.文档没有提供示例.

Answer 1

C++/CX集合遵循与c ++集合相同的原则,因此它们具有迭代器和开始,结束函数.

IMap<Platform::String^, Platform::Object^>^ map = ref new Map<Platform::String^, Platform::Object^>();
map->Insert("key1", "val1");
map->Insert("key2", 2.0f);

// Exactly like you would iterate over a map, but instead of std::pair you have IKeyValuePair
std::for_each(begin(map), end(map), [](IKeyValuePair<Platform::String^, Platform::Object^>^ pair)
{
    // do stuff
    auto key = pair->Key;
    auto value = pair->Value;
});

for( auto pair : map )
{
    // do stuff
    auto key = pair->Key;
    auto value = pair->Value;
}

另外,不要忘记包含collection.h并使用命名空间Platform :: Collections.