小编Sob*_*ght的帖子

我正在从事本机项目。

通过运行“ npm install”更新模块后，

我在“ react-native-gesture-handler”的“ android.support.v4.util”中找不到类“ Pools”。

1. 为什么会发生此错误？
2. 我怎样才能解决这个问题？

1.错误（如果运行“ react-native run-android”）-cmd

Task :react-native-gesture-handler:compileDebugJavaWithJavac FAILED
D:\weneepl\project_y-test2_t\project_y\node_modules\react-native-gesture-handler\android\src\main\java\com\swmansion\gesturehandler\react\RNGestureHandlerEvent.java:3: error: cannot find symbol
import android.support.v4.util.Pools;
                              ^
  symbol:   class Pools
  location: package android.support.v4.util
D:\weneepl\project_y-test2_t\project_y\node_modules\react-native-gesture-handler\android\src\main\java\com\swmansion\gesturehandler\react\RNGestureHandlerEvent.java:19: error: package Pools does not exist
  private static final Pools.SynchronizedPool<RNGestureHandlerEvent> EVENTS_POOL =
                            ^
D:\weneepl\project_y-test2_t\project_y\node_modules\react-native-gesture-handler\android\src\main\java\com\swmansion\gesturehandler\react\RNGestureHandlerStateChangeEvent.java:3: error: cannot find symbol
import android.support.v4.util.Pools;
                              ^
  symbol:   class Pools
  location: package android.support.v4.util
D:\weneepl\project_y-test2_t\project_y\node_modules\react-native-gesture-handler\android\src\main\java\com\swmansion\gesturehandler\react\RNGestureHandlerStateChangeEvent.java:18: error: package Pools does not exist
  private static final Pools.SynchronizedPool<RNGestureHandlerStateChangeEvent> EVENTS_POOL =
                            ^
D:\weneepl\project_y-test2_t\project_y\node_modules\react-native-gesture-handler\android\src\main\java\com\swmansion\gesturehandler\react\RNGestureHandlerEvent.java:20: error: package Pools does not exist
          new …

我想从所有表单数组的实例中获取 'onduty' 值。我在 html 中试过这个：

<span *ngFor="let day of workDayandTime.controls;let i= index;">
 {{day.onduty}}
</span>

但我无法获得任何价值。

这是 json 中 workDayandTime 的值： workDayandTime 表单数组

形式 ：

<span *ngFor="let day of workDayandTime.controls;let i= index;">
 {{day.onduty}}
</span>

短时paper.ts

class employerShortForm extends FormGroup {
    constructor(fb: FormBuilder) {
        super({
            employer: fb.group({
                name: new FormControl('',Validators.required),
            }),
            employee: fb.group({
                name: new FormControl('', Validators.required)
            }),
            contractStart: new FormControl(''),
            contractEnd: new FormControl(''),
            workAddress: new FormControl('', Validators.required),
            work: new FormControl('', Validators.required),
            workDayandTime: fb.array([]),
            wageType: new FormControl(''),
            wage: new FormControl(''),
            bonus: new …