MixImageOption iOS合成图片太多张，内存暴涨后崩溃

### Version

1.6.0

### Platforms

iOS

### Device Model

iPhone

### flutter info

```sh
MixImageOption iOS合成图片太多张，内存暴涨后崩溃
```

### How to reproduce?

MixImageOption iOS合成图片太多张，内存暴涨后崩溃

### Logs

```sh

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### Example code (optional)

```Dart

```

### Contact

_No response_