# TaskGroup::IsComplete

```cpp
bool IsComplete() const;
```

检查任务组中的所有任务是否已完成。

**参数：** 无

**返回：** 
- `true` - 所有任务已完成（包括被取消的）
- `false` - 仍有任务在执行或等待执行

**线程安全：** ✅ 线程安全

**示例：**

```cpp
#include "XCEngine/Threading/TaskGroup.h"
#include "XCEngine/Threading/Task.h"
#include <iostream>
#include <chrono>

using namespace XCEngine::Threading;

int main() {
    TaskGroup group;

    group.AddTask([]() {
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
        std::cout << "Task completed\n";
    });

    std::cout << "Immediately after AddTask, IsComplete: "
              << (group.IsComplete() ? "true" : "false") << "\n";

    group.Wait();

    std::cout << "After Wait, IsComplete: "
              << (group.IsComplete() ? "true" : "false") << "\n";

    return 0;
}
```

## 相关文档

- [TaskGroup 总览](task-group.md) - 返回类总览
- [GetProgress](get-progress.md) - 获取进度百分比