嗨,我有一个离子项目的代码笔。
它现在只显示一个图像,我已经制作了两个按钮来放大和缩小。
问题是,当我点击放大并滚动到最右边或右下角,然后点击缩小...滚动区域不会更新,我留下了白色屏幕。
如果我然后单击屏幕一次,滚动区域会调整!
如何自动实现这一目标?
http://codepen.io/anon/pen/VaGeeg
angular.module('ionicApp', ['ionic'])
.controller('MyCtrl', function($scope) {
// get image-holder details
$scope.imageHolderDetails = document.getElementById('img-holder').getBoundingClientRect();
$scope.imageHolderWidth = $scope.imageHolderDetails.width;
// get image
$scope.image = document.getElementById('image');
//set zoom amount to image-holder width x 2
$scope.zoomAmount = $scope.imageHolderDetails.width * 2;
// set the image to full width of image-holder
$scope.image.style.width = $scope.imageHolderWidth + 'px';
// zoom in
$scope.zoomIn = function() {
$scope.image.style.width = $scope.zoomAmount + 'px';
}
// reset zoom
$scope.zoomOut = function() {
$scope.image.style.width = $scope.imageHolderDetails.width + 'px';
}
});
body {
cursor: url('http://ionicframework.com/img/finger.png'), auto;
}
<html ng-app="ionicApp">
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
<title>Ionic Template</title>
<link href="//code.ionicframework.com/nightly/css/ionic.css" rel="stylesheet">
<script src="//code.ionicframework.com/nightly/js/ionic.bundle.js"></script>
</head>
<body ng-controller="MyCtrl">
<ion-header-bar class="bar-stable">
<h1 class="title">Gummy bears anyone?</h1>
</ion-header-bar>
<ion-content id="img-holder" scroll="true" overflow-scroll="false" locking="false" direction="xy">
<img id="image" src="https://static.pexels.com/photos/55825/gold-bear-gummi-bears-bear-yellow-55825.jpeg">
</ion-content>
<ion-footer-bar class="bar-royal">
<a class="tab-item" ng-click="zoomOut()">
<i class="icon ion-minus"></i>
</a>
<a class="tab-item" ng-click="zoomIn()">
<i class="icon ion-plus"></i>
</a>
</ion-footer-bar>
</body>
</html>
答案 0 :(得分:4)
您需要致电$ionicScrollDelegate.resize()
答案 1 :(得分:1)
这是我在Ionic使用手风琴时遇到的问题。我给出的建议是在您的操作后使用以下代码自动更新可滚动区域(放大或缩小后):
BEGIN TRY
BEGIN TRANSACTION CheckLogin
--Existing SQL code
COMMIT TRANSACTION CheckLogin
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION CheckLogin
END CATCH
需要使用 $timeout($ionicScrollDelegate.resize, 100);
以确保正确调用$timeout
。我发现使用值$scope.apply()
来表示我的超时时间不够,并选择使用100毫秒。这也是我在Ionic论坛上发现的建议。您应该查看0
及其相关指令,以获取更多信息。