目录

@performance/custom-node-memory-leak-check

建议在Component中新建自定义节点时主动释放节点，避免因未释放节点导致的内存泄漏。

规则配置

// code-linter.json5
{
  "rules": {
    "@performance/custom-node-memory-leak-check": "warn",
  }
}

选项

该规则无需配置选项。

正例

import { BuilderNode } from '@kit.ArkUI';

@Entry
@Component
struct BuilderNodeDisposeExample {
  private builder: BuilderNode<[]> | null = null
  build() {
    Column({ space: 20 }) {
      Button('open dialog')
        .onClick(() => {
          const uiContext = this.getUIContext()
          this.builder = new BuilderNode(uiContext) // 创建 BuilderNode
        })

      Button('close dialog')
        .onClick(() => {
          if (this.builder) {
            this.builder.dispose() // 释放构建出的节点
            this.builder = null
          }
        })
    }
    .width('100%')
    .height('100%')
    .padding(20)
    .backgroundColor(Color.Grey)
  }
}

反例

import { BuilderNode } from '@kit.ArkUI';

@Entry
@Component
struct LeakyBuilderExample {
  private builder: BuilderNode<[]> | null = null
  build() {
    Column({ space: 20 }) {
      Button('create dialog')
        .onClick(() => {
          const context = this.getUIContext();

          // 没有释放旧 builder，直接创建新 builder
          this.builder = new BuilderNode(context)

        })
    }
    .width('100%')
    .height('100%')
    .padding(20)
    .backgroundColor(Color.Grey)
  }
}

规则集

plugin:@performance/all

Code Linter代码检查规则的配置指导请参考Code Linter代码检查。