CODEWITHSUNDEEP
iosswiftuitextview
orazz
orazz

Reputation: 2198

Display html data in UITextView or UILabel in swift

How to display html data in UITextView or UILabel, There is some method this work, but take a lot of time to load and when scrolling 

cell.textView.attributedText = NSAttributedString(
            data: comments.commentBody.dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true)!,
            options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
            documentAttributes: nil,
            error: nil)

Upvotes: 2

Views: 4274

Answers (3)

Niraj
Niraj

Reputation: 11

Dispatching a block to the main queue is done from a background queue to signal that some background processing has finished:

dispatch_queue_t backgroundQueue = dispatch_queue_create("YourQueueName", 0);

dispatch_async(backgroundQueue, ^{
;
    //Do background `enter code here`process like forming attributed string from API parameter..
    dispatch_async(dispatch_get_main_queue(), ^{
    //Update UI for textview ...
});
});

In this case, we are doing a lengthy calculation on a background queue and need to update our UI when the calculation is complete. Updating UI normally has to be done from the main queue so we 'signal' back to the main queue using a second nested dispatch_async.

Upvotes: 0

iagomr
iagomr

Reputation: 442

If the issue is only the slow loading, try to do the network request asynchronously with dispatch_async in a side thread and then update the UI in the main thread (mandatory!)

let commentsQueue:dispatch_queue_t = dispatch_queue_create("comments queue", nil)

dispatch_async(commentsQueue, {

    let commentsRequested = NSAttributedString(
        data: comments.commentBody.dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true)!,
        options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
        documentAttributes: nil,
        error: nil)

    dispatch_async(dispatch_get_main_queue(), { 
            cell.textView.attributedText = commentsRequested
    })
})

Upvotes: 2

Rashad
Rashad

Reputation: 11197

This might be a problem with Apple's HTML to NSAttributedString API, you can try NSAttributedString+HTML.

Upvotes: 1

Related Questions