Is it possible to add a text link into a TextView? I want the link to perhaps behave like a button, where I can assign an action to it.
EDIT: When I say assign an action, I mean actually giving it something in the code. I'm wondering if it's possible to dynamically add a "button" into text that I can assign a coded action to.
Live scenario
Think of something like a dictionary app. Maybe the definition of one word uses another word that you might not know the definition of, so being able to click on that word to instantly search it rather than having to type it in would be a nice user friendly feature. It seems rather unlikely, though, I guess.
I would recommend using NIAttributedLabel from Nimbus, an open source iOS library. You can specify text ranges that are links, and you get delegate messages sent when a user taps on it.
Main Nimbus site: http://nimbuskit.info/
NIAttributedLabel docs: http://docs.nimbuskit.info/interface_n_i_attributed_label.html
in the inspector, go to the Text View Attributes tab then make sure "Detect Links" is checked.
Yes you can. Add the URL into the text view, then open up the Attributes Inspector. You will see an option in there to detect links.
I know of a way, but its a LOT of work. First, you have an NSAttributedString that you have the text view display. Second, attribute the range of text you want to be the button. Third, assign a tap gesture recognizer to the text view and in the method called by the recognizer, you'll use core text to determine if the tap happened over the range of text that represents the buttons.
Heres how youll use core text: create a framesetter with the attributed string. Create a frame from the framsetter with the shape of a square that is the frame of the text view, inset by the padding of the text view. The frame will allow you to get the y origins of every line in the text view and and once you know what line the tap happened on, you can use the line to then figure out exactly what character was tapped on that line by giving it an x offset. Once you know character index on the line, you can add it to the beginning of the range of the line and get the index of the character within the whole string. Then you can check if its within the range of the text that is your button. If it is, you can then call a method to simulate a target action type behavior.
Ive explained the process of how to accomplish this and specified what kinds of core text objects youll need, ill let you look up the specific api details:
https://developer.apple.com/library/mac/documentation/Carbon/Reference/CoreText_Framework_Ref/_index.html#//apple_ref/doc/uid/TP40005304
You can also use my objc core text wrapper:
https://github.com/mysterioustrousers/MYSCoreText
What about CoreText? It Can draw many kinds of Text .
Related
In my application (that has to be accessible for blind user) I have this scenario (its a grammatic exercise)
When I try it on a device turning on VoiceOver, first it focus on the first part of the sentence, so in that case it read "Kesha" and when i swipe right to read the next part it read the second part of the sentence "the contract because...". What I want is to make it also focus on the gray box (that is a UIViewelement) before it read the second part of the sentence, so that the user know where that empty box is in the sentence, but i don't know how to do that.
I alread tried grayBox.accessibilityLabel = "empty box" or grayBox.accessibilityHint = "empty box" but it just don't set the focus on that view and it doesn't speak. I also tried to put an empty UILabel inside the box but I have some issue positioning that in the right order and I don't think it is the right way to do it. Any suggestion?
On the UIView that you want to 'receive focus' you just need to enable accessibility or mark it as an accessible element, An example:
myGreyView.isAccessibilityElement = true
myGreyView.accessibilityLabel = "A grey box"
myGreyView.accessibilityHint = "this is a secretive box. I don't know what it does"
You can also tick a box in the UIView's properties in xcode interface builder "Accessibility Enabled" I think its called. Which also lets you set the label and hint.
For more information see this Apple guide to VoiceOver
In regards to the order of elements being read out. Is the first part and second part different UILabels or one label?
Are you adding these in code or Xib/Storyboard? Depending on the order they are added as subviews can effect the order VoiceOver reads items out.
When adding the 3x UI elements add them in this order below.
UILabel - "Kesha"
UIView - Gray box, "A grey box"
UILabel - "the contract because it was not fair."
If you have added them via Interface builder (Xib/Storyboard) make sure the order is correct in the view hierarchy.
If this fails you could try overriding the method "accessibilityElements" and return an array of the labels and grey view in the order you want them read out.
I am trying to create a custom keyboard using the app keyboard extension. I am happy with the layout but the output is depended on the UITextField's font.
Is there a way to force a different font (use special characters?) while using the keyboard ?
Thank you
It depends.
Text field (or any other view that draws text) uses 2 informations on how to show some text. One is the sequence of characters called String and the other one is how the string should be represented. The second one is then split it things like fonts, colors, line height, line breaking and wrapping...
So the keyboard alone is not enough to for instance present a certain part of word using different fonts. You need at least a bit of access to the item that represents the text. So if you have no access to your text field then the answer is; No, you can not fore a different font when using different keyboard.
If you do have the access then the answer should lie in NSAttributedString. It is a string you can assign to most items under attributedText. This class wraps your raw string and can add many properties to parts of text you want to change. That includes using a different font.
Another approach would be using HTML tags. Again you will need to process this using for instance NSAttributedString or display it with another element like web view.
I would try it with using NSAttributedString. Hook up to delegate and implement textField(: shouldChangeCharactersIn: replacementString:. The implementation itself may still not be easy though.
I need help in string formatting in iOS UITextView. I have a textView, for now it`s editable. Now I want to add a few strings. they should be like header and user must be able to type only under it, and when he press ENTER or DELETE line sting should change their position, so at the end it should look like
Header 1(with color not editable)
/* user can type here
*/
Header 2 (with color not editable)
/* user can type here
*/
I think i need to use delegate and attributed string or something,
but I can`t figure it out. HELP please
The best way to achieve this is to make two labels and two text views on top of a scroll view. like
The heights of two text views can by dynamic depending on the text length. And in this case you can avoid endless IF conditions as you would need to put everything in a single Text view.
The advantage of this approach is the label text format will be very easy to set, you can simply set the attributed string in the storyboard.
I need to write some text in openLayers 3... Not a label, something like a text object, that I can select and drag around the map. This text must have multiple lines.
I tried to use a point with ol.style.text, but it isn't multiline.
I also tried the popups, but I need the text to be always displayed.
Is there any way to use a text feature for this (ol.format.TextFeature)?
Is there any object that I can use for that purpose?
Thanks!!
You can use an ol.Overlay for that. An overlay is basically anything an Element can be. It has a position an positioning that can be set at any time.
See an example: http://openlayers.org/en/v3.9.0/examples/overlay.html?q=overlay
You could use map browser events (pointerdown, pointerup) and if the target is your overlay element then you could move it around and update its position.
I'm not sure if I use the phrase correctly.
The function I want is that after user typed some characters (or clicked a button), a list will be shown under the textfield.
An easy example is Google search. After you typed "fb" or "faceb", it shows "facebook" in the suggestion list.
The content of the list is stored in an array, which comes from the return of web services.
Thanks
You've got to intercept the keystrokes with UITextView textViewDidChange. Then, with each keystroke, you implement the lookup algorithm and display your list of selections above or below the UITextView where the data entry is occurring. The list has to somehow be "touchable" to select from it.
Ray Wenderlich has a tutorial that shows how this can be done over at his blog
He creates a table below the text field that is touchable.
There is also a sample project there.