Keyword parsing and prediction in iOS

Question

I want to add a text field where users can enter keywords. I want them to be suggested/parsed in a manner similar to websites like Soundcloud (and Stack Overflow etc). Are there any existing open source projects that do this I could import? What I am looking for is something like this image picker: https://github.com/mikaoj/BSImagePicker but for this keyword task.

Thanks!

What are you confused about? I want a text field (UITextField, I guess) where users enter keywords. I want a tappable suggestion to appear as a keyword is entered. I want confirmed keywords to appear as boxes that can be deleted. Just like entering keywords on this website, for example. I am asking if this has been implemented for use as a library in other projects, such as this Photos picker: https://github.com/mikaoj/BSImagePicker — noizybrain, Jan 11 '16 at 06:00

score 1 · Answer 1 · edited May 23 '17 at 12:23

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One way that I have implemented a search by keyword type feature is to have a table view underneath a UITextField, displaying a filtered list of possible matches as you enter text.

The link below has an answer which filters an array of strings. Note that you may wish to use "containsString" instead of "rangeOfString".

Check if array contains part of a string in Swift?

I don't know much about libraries or how Soundcloud does it, but I think a keyword based search is not too hard to implement if you are feeling energetic.

edited May 23 '17 at 12:23

Community

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answered Jan 11 '16 at 06:17

mcfisty

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I'll do something like this if there's nothing out there. Thanks – noizybrain Jan 11 '16 at 06:22

score 1 · Answer 2 · answered Jan 11 '16 at 06:22

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For doing the thing you want, You first require list of all available keywords. Once you have array of keywords, perform the following steps.

Implement textfield's delegate, method named textfield:shouldChangeTextInRange ....
assign textfield's delegate to self
Now, in above delegate method, create new string that is going to generate
Now apply NSPredicate to search for in keywordsArray
From the output of keywords filtered array, show whichever you wants to

answered Jan 11 '16 at 06:22

Mehul Thakkar

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Cool, NSPredicate. I'd never heard of that and it looks hella useful! – noizybrain Jan 11 '16 at 06:27
For your knowledge, whenever you want to perform search: use "NSPredicate", whenever you want to perform sorting, use "NSSortDescriptor", these 2 are very useful classes, but usually developers dont look into it and tries by using for-loops – Mehul Thakkar Jan 11 '16 at 06:30

Keyword parsing and prediction in iOS

2 Answers2