本文介绍了我如何在localStorage中分配localForage中的变量?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 请帮我解决以下问题。Please help me with the following.我一直在将我的AngularJS应用程序从localStorage转换为localForage。I have been converting my AngularJS application from localStorage to localForage.在我的应用程序中我分配了localStorage像这样的价值。throughout my application I was assigning the localStorage value like this.window.localStorage.setItem('localSavedValue','SavedValue');然后我正在检索这样的数据,and then I was retrieving the data like this,var myValue = window.localStorage.getItem('localSavedValue');所以当我在console.log(myValue)时; //输出'SavedValue'So when I console.log(myValue); // it outputted 'SavedValue'我尝试使用localForage时似乎无法做到这一点,I cannot seem to do this with localForage when I try,$localForage.setItem('localSavedValue','SavedValue');var myValue = $localForage.getItem('localSavedValue');console.log(myValue); // returns an object.我没有将值设置为myValue。I don't get the value set to myValue.我确信这是与promises有关的事情,因为当我使用回调时我可以访问正确的'myValue'但是我想把它从调用中取出来用于其余的服务。I am sure this is something do do with promises as when I use the callback I can access the correct 'myValue' however I want to get it out of the call back to use in the rest of the service.另外要注意,我在服务中因此无法分配到$ scope(除非我不知道如何)。Also to note, I am in a service so can't assign to $scope (unless I don't know how).感谢任何帮助。谢谢 B推荐答案 LocalForage在设计上是异步的,所以我建议你使用像@RouR建议的Promise。LocalForage is async by design so I would suggest you to use Promises like @RouR suggested.代码清晰度的一个小改进是链 - 返回promise结果,但你仍然无法避免异步代码的后果。A minor improvement for code clarity would be to chain-return the promise results, but you still can't avoid the async code consequences.$localForage.setItem('localSavedValue','SavedValue').then(function() { return $localForage.getItem('localSavedValue');}).then(function(data) { console.log('I\'m printed second', data);});console.log('I\'m printed first');如果您使用的是Babel,这种迁移的更友好方法是将其配置为使用 transform-async-to-generator 或 preset-es2017 并重写代码为If you are using Babel, a more friendly approach for such migrations would be to configure it to use transform-async-to-generator or preset-es2017 and rewrite such code asawait $localForage.setItem('localSavedValue','SavedValue');const data = await $localForage.getItem('localSavedValue');console.log(data); 这篇关于我如何在localStorage中分配localForage中的变量?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!
08-14 16:55
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