Question

我已经创建了自己的listmodel并覆盖了它的方法，图像显示在android中，但是在iphone中它首次显示图像，当返回并返回页面时它只显示白屏，如何解决？

@Override
public Image getItemAt(final int index) {
    if (images[index] == null) {
        String imageName = "image_" + urls.get(index).hashCode();
        if (Storage.getInstance().exists(imageName)) {
            InputStream is;
            try {

                is = Storage.getInstance().createInputStream(imageName);
                EncodedImage i = EncodedImage.create(is, is.available());
                images[index] = i;
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        } else {
            images[index] = defaultImage;
            Util.downloadUrlToStorageInBackground(urls.get(index), imageName, (e) -> {
                try {
                    images[index] = EncodedImage.create(Storage.getInstance().createInputStream(imageName));
                    listeners.fireDataChangeEvent(index, DataChangedListener.CHANGED);
                } catch (IOException err) {
                    err.printStackTrace();
                }
            });
        }

    }

    return images[index];
}

Answer 1

您似乎返回//HTML <div ng-model="len"> <h2 id="timednum"> <span>{{ len }}</span> </h2> </div> //js var firebaseRef = new Firebase("https://myApp.firebaseio.com/data"); firebaseRef.on('value', function(dataSnapshot){ var tableLength = dataSnapshot.val().data; $scope.len = tableLength; $scope.$apply(); //SOLUTION!!!! console.log("this updates properly" + $scope.len); }) });表示可能存在问题的丢失图像。您需要返回占位符值并在以后替换它们。

图像未在iPhone中加载

1 个答案: