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XCSDD/docs/api/rhi/swap-chain/get-current-back-buffer-index.md

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# RHISwapChain::GetCurrentBackBufferIndex
```cpp
virtual uint32_t GetCurrentBackBufferIndex() const = 0;
```
获取当前后台缓冲区索引。
**返回:** 当前后台缓冲区索引
**示例:**
```cpp
uint32_t index = swapChain->GetCurrentBackBufferIndex();
```
## 相关文档
- [RHISwapChain 总览](swap-chain.md) - 返回类总览