Nstextfield not updating

15-May-2020 11:42 by 5 Comments

Nstextfield not updating - best friends now dating

My intent with this code is mainly to help teach someone how to go about this without a separate writeup explaining the code; it's meant to accompany the explanation of the in my answer.

Now that you understand the concepts behind KVC and KVO, Cocoa bindings won't be too mysterious.

The appropriate approach then can only logically be to dispatch the UI update onto the main thread from the background thread when new data has actually been received.

Here is an example: Cocoa makes a distinction between "keys" and "key paths".

Doing otherwise is undefined behavior; sometimes it'll work, sometimes it won't, sometimes it'll just crash.

A quick fix to your issue would be to simply use Grand Central Dispatch (GCD) to dispatch those updates to the main queue with ) in a queue that the default run loop (which runs on the main thread/queue) checks on each pass through its loop.

Cocoa bindings allow you to synchronise two key paths[2] so they have the same value.

For example, let's say you have a For a more complete look at how views propagate changes back to the bound object, see my article: Implementing Your Own Cocoa Bindings.Welcome to Mac Help where discuss anything Apple related or seek expert tech support.Please join our friendly community by clicking the button below - it only takes a few seconds and is totally free.May not be a big deal, and in this case, it's definitely not, but this is an extraordinarily simplistic case.Moreover, any time you update the data and don't immediately update the UI to reflect that change in data, your UI is behind.Also taken in to account is the need for data synchronization between the writes on the background thread and the reads on the main thread.