imagecache | Caching extension for the Intervention Image Class | Caching library

1. For your issue where the previous image is showing when the cell is reused, you should override func prepareForReuse() in PhotoTableViewCell and set photoImageView.image = nil.
2. For your performance issue, it looks like you're making the API request off the main thread, so that's a good start. How large are the images you're requesting? I'm wondering if the data is so large that it's taking a lot of time to convert it to an image and then set the image on the image view

Yes, you are correct with the implementation. So the thing is, NetworkImage tries to load the image and fails to load it. And hence, the _loadAsync() method rethrows the exception. Now, as you have provided errorBuilder, the framework uses that widget to show when an exception occurs. Hence, you are getting an exception that is rethrown from the framework but is handled as you have provided errorBuilder. Now, if you remove the errorBuilder you will get the exception logged in debug console, as well as the user, will be able to see that red exception screen if in debug mode and grey screen in release mode.

So, you are correct with the implementation as well as your doubt, but you missed the exact explanation of errorBuilder.

I hope this made your doubt clear!

That's because your write() method in the loop overwrites the previous element every time it runs. Try it this way:

If I understand you correctly, you can do something like this, using python, lxml and xpath, and a very simplified version of your xml, with two offers:

FutureBuilder removes boilerplate code. see

Let's say you want to fetch some data from the backend on page launch and show a loader until data comes.

Tasks for ListBuilder:

• Have two state variables, dataFromBackend and isLoadingFlag On

• launch, set isLoadingFlag = true, and based on this, show loader.

• Once data arrives, set data with what you get from backend and set
  isLoadingFlag = false (inside setState obviously)

• We need to have a if-else in widget creation. If isLoadingFlag is true,show the loader else show the data. On failure, show error message.

Tasks for FutureBuilder:

• Give the async task in future of Future Builder
• Based on connectionState, show message (loading, active(streams), done)
• Based on data(snapshot.hasError), show view

Pros of FutureBuilder

• Does not use the two state variables and setState
• Reactive programming (FutureBuilder will take care of updating the view on data arrival)

Example:

Override prepareForReuse method in UITableViewCell and add code in this function to clean up unrequited data that could persist from previous usage of the cell. In your example assign the default image in this function to produce better result.

Turned out to be a security issue. From brower I have access but only because I'm logged in. If I try to get the image without being logged in, a security error poped up.

So solution is to play around with the controller pattern and security:http intercept-url

Ok, i kind of found the problem. I took the Firebase servertimestamp as variable for the filename in the Firebase Storage. That of course only resulted in the filename being

FieldValue(Instance of 'MethodChannelFieldValue')

Though i dont really understand why that was a problem, but now with a normal Datetime toString timestamp it all works perfectly fine. Maybe its some special character escaping in the generated downloadURL from Firebase Storage with this kind of filename.

in the assetImage the synatx is usually like this :

image: AssetImage("images/loginBackground.png")

also if you didn't enable your assets in pubspec.yaml by doing this in your assets section :