我想在映射內(nèi)完成所有異步函數(shù)的執(zhí)行，然后更改組件的狀態(tài)。我給你留了一個(gè)減少的代碼部分，以防你能幫助我。我所要做的就是在每次用戶取消時(shí)顯示我自己的權(quán)限屏幕。為了簡化，我有這個(gè)：const permissions = {    cameraRoll: {        iconType: "ionicon",        iconName: "ios-images",        title: "Enable camera roll",        subtitle:          "To upload content from your Gallery, you have to granted the camera roll permission",        buttonText: "Enable camera roll",        checkPermission: checkCameraRollPermission,        requirePermission: requireCameraRollPermission,      },    };}const checkCameraRollPermission = async () => {    const { status, canAskAgain } = await Permissions.getAsync(      Permissions.CAMERA_ROLL    );    return { status, canAskAgain };  };  const requireCameraRollPermission = async () => {    const { status, canAskAgain } = await Permissions.askAsync(      Permissions.CAMERA_ROLL    );    return { status, canAskAgain };  };/* I HAVE TO WAIT FOR ALL THE FUNCTIONS TO FINISH EXECUTIONFOR EACH OBJECT ON THE MAP BUT THIS IS NOT WORKING :( */getMissingPermissions = () => {    // Only check permissions on the foreground    if (AppState.currentState.match(/active/)) {      // We have to empty the current missing permssions and recalculate them      const permissionsArray = [];      Promise.all(        Object.keys(permissions).map((key) => {          permissions[key].checkPermission().then(({ status }) => {            if (status !== "granted") {              permissionsArray.push(permissions[key]);            }          });        })      ).then(() => {        this.setState({          missingPermissions: permissionsArray,        });      });    }  };有什么想法嗎？謝謝