[英]AngularJS + Ionic is truncating scope value after the return from second page to the main page.
我在我的應用程序的“第一個”Ctrl中有以下代碼,它顯示倒計時的計時器。
一切都工作得很好,直到我訪問了第二頁,這是在這樣定義的app.js中:
.state('app.home', {
url: '/home:playlistData',
views: {
'menuContent' :{
templateUrl: 'templates/home.html',
controller: 'HomeCtrl'
}
}
})
.state('app.saved', {
url: '/saved',
views: {
'menuContent' :{
templateUrl: 'templates/saved.html',
controller: 'SavedCtrl'
}
}
})
如果我從第二個視圖回到第一個計數器仍然顯示但值
$scope.minutesLeft
沒有更新但是
setInterval
函數仍在后台執行代碼,更新的數據值仍保留在Dataholdingservice中。
我嘗試了范圍應用和超時功能,但沒有運氣。
有人能告訴我如何解決這個問題?
非常感謝任何幫助。
用於倒數計時器的HomeCtrl代碼如下:
$scope.setTimer = function(timer) {
console.log(timer);
$scope.timer = timer;
};
$scope.saveTimer = function(timer) {
if($scope.selectedSounds.length == 0) {
$scope.showAlert("Add some sounds", "Cannot run timer for empty list");
} else {
$scope.clearCountDownAnimation();
var animationTimerId = setInterval(function () {
$("#minutesLeft").fadeTo(100, 0.1).fadeTo(200, 1.0);
}, 1000);
Dataholdingservice.setAnimationId(animationTimerId);
Dataholdingservice.setMinutesLeft(timer);
$scope.closePopover();
$scope.countDown();
}
};
$scope.clearCountDownAnimation = function() {
$("#minutesLeft").clearQueue().finish();
// Clear previously set animations
console.log(Dataholdingservice.getAnimationId());
if (Dataholdingservice.getAnimationId() != null) {
console.log("Interval cleared");
clearInterval(Dataholdingservice.getAnimationId());
}
};
$scope.countDown = function() {
var minutesLeft = Dataholdingservice.getMinutesLeft();
$scope.minutesLeft = minutesLeft;
$scope.isCounterDisplayed = Dataholdingservice.isCounterDisplayed();
var timerId = setInterval(function() {
console.log("Counting down");
minutesLeft -- ;
console.log("Decreasing minutes");
console.log(minutesLeft);
Dataholdingservice.setMinutesLeft(minutesLeft);
console.log("minutes left " + Dataholdingservice.getMinutesLeft());
$scope.$apply(function () {
$scope.minutesLeft = Dataholdingservice.getMinutesLeft();
});
if(minutesLeft <= 0) {
console.log("Time left");
clearInterval(Dataholdingservice.getTimerId());
clearInterval(Dataholdingservice.getAnimationId());
console.log(Dataholdingservice.isCounterDisplayed());
$scope.hideCounter();
$scope.stopAllSelectedSounds();
}
}, 1000 * 1);
Dataholdingservice.setTimerId(timerId);
};
$scope.hideCounter = function() {
console.log("Hidding the counter");
$scope.isCounterDisplayed = false;
$scope.$apply();
};
$scope.cancelTimer = function() {
clearInterval(Dataholdingservice.getTimerId());
clearInterval(Dataholdingservice.getAnimationId());
$("#minutesLeft").hide();
$ionicLoading.show({
duration: 500,
template: 'Timer canceled'
});
};
由於$scope.minutesLeft
是原始數據類型,因此控制器中發生的更改有時不會反映在視圖中。 您可以創建一個像$scope.viewModel = {}
這樣的對象,然后在您的倒計時函數$scope.viewModel.minutesLeft = mintesLeft
作為屬性添加到$scope.viewModel.minutesLeft = mintesLeft
,並將viewModel.minutesLeft
綁定到視圖。 您應該看到正確更新的值。
我不確定您的具體要求,但我已經將用於創建簡單計時器的代碼放在一起,該計時器在角度服務中在后台運行。 工作代碼可在http://codepen.io/svswaminathan/pen/MYXOPM獲得
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.