iOS7 webkit 频繁崩溃——没有释放内存? [英] iOS7 webkit crashes frequently - not freeing up memory?

问题描述

我注意到我的 Phonegap 应用在 iOS7 上出现了一些在 iOS6 上没有发生的内存问题.

I'm noticing my Phonegap app is having some memory issues on iOS7 that weren't happening on iOS6 .

1. 带有许多图像的长 iScroll 列表
2. 显示手机相册中的图像 (9mp) 会在您查看多个图像后崩溃

对于#1，无论设备如何，这在 iOS6 上都不是问题.

For #1, this was never an issue on iOS6, regardless of device.

对于#2，我重新使用相同的 DIV 元素来显示下一张图片，所以看起来上一张图片没有被清除.

For #2, I am re-using the same DIV element to display the next picture, so it seems that the previous image is not being cleared.

本文中提到的技术似乎不再适用于 iOS7:在 Javascript 中加载图像时 iPad/iPhone 浏览器崩溃

The techniques mentioned in this post no longer appear to work in iOS7: iPad/iPhone browser crashing when loading images in Javascript

推荐答案

我找到的这个问题的最佳解决方案是以下代码:

The best solution for this problem I found is the following code:

var img = document.getElementById('imageID');
img.parentNode.removeChild(img);
img.src = 'data:image/gif;base64,' + 
      'R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=';
setTimeout(function() {
img = null;
}, 60000);

这会将 src 属性设置为一个很小的 ​​gif，然后等待足够长的时间以最终发生垃圾收集.

This sets the src attribute to a tiny gif and then waits long enough for garbage collection to happen eventually.

参见:http://www.fngtps.com/2010/mobile-safari-image-resource-limit-workaround/

这应该对你有用.我可以使用 Xcode 工具验证内存是否已释放.不幸的是，此解决方案似乎不适用于我正在使用的主屏幕应用程序.

This should work for you. I could verify that the memory is released by using the Xcode instruments. Unfortunately this solution doesn't seem to work for homescreen apps which I am using.

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