I have a UITextView with attributes enabled, and I want to change the formatting (font/alignment/color/etc) within the NSAttributedString starting at a point. In other words, there is no specific part of the underlying NSAttributedString I want to change per se, I just want to make the next thing added into the UITextView have different formatting from what is in there so far.
For example, you might imagine a UITextVIew with a string inside it, and then the user enters a new line and taps a button to increase the font size. The user does not want to increase the font size of everything, just starting at that point.
Can this be done? Thanks.
If you need precise control over the dynamic style behavior of your UITextView (and if you are >= iOS 7), you should consider using Text Kit, and in particular subclassing NSTextStorage. There is a introduction video to Text Kit from WWDC 2013, and a great tutorial by Ray Wenderlich.
Related
I am experimenting a little bit witch apps programming.
How I can add a UIImage to a UITextField"?
Like Whats App or the most other Chat Apps.
I have search some time but doesn't find a solution, also i have tried to search in side of XCode with the auto complete but I have not found a function. So I hope you can help me.
The easiest way to add an image to a text field is to have a UIView that contains both UITextField and a UIImageView as subviews.
Next up, you can have a UIButton with both an image and text, and just set userInteractionEnabled to "NO" and it'll behave like a text view with an image next to it.
Now to get more complicated, if you want a chat-like text field that allows text (that you can type into) and images next to each other, you need to start thinking about custom subclasses. Other people have asked and have gotten answers for this same approach.
I have a UITextView with some content of text. I need to get the exact range value of character/string from tapped location. I set TapGestureRecognizer for UITextView. In its action method i need to get the Range of tapped location. How its possible? I tested with some answers from Stackoverflow but they were not perfect. Thanks in advance.
Have you looked at the UITextView documentation?
https://developer.apple.com/library/ios/documentation/uikit/reference/uitextview_class/Reference/UITextView.html#//apple_ref/occ/instp/UITextView/selectedRange
You can use this selectedRange method to determine the range of text that is selected by the user.
Late edit: this was just recently downvoted, and gave me a chance to re-read my answer and I'd downvote my answer from 3 years ago too.
Updated answer:
If there is a single tap, the tap action itself should have the info you need. At the core here, you'll need the UITouch events themselves, such as to calculate where the touch occurred in relation to where your text should be. This will let you know what part of text was covered by the user's finger.
I'm honestly not sure if any 3rd party solutions exist for this, but I'd bet cocoapods.org would be a good place to start with keyword UITextView tap, if not Github itself with keywords: cocoapod uitextview.
If I were implementing such a solution, with UITouch events in hand, using the properties described in the docs I'd use The location of the touch within the view or window
given by the class.
By manipulating on one hand CGPoints from: https://developer.apple.com/documentation/uikit/uitouch/1618116-location, you can then use String mechanisms for determining size of text in your given font.
While this solution is for a UILabel, it can either:
(a) be used in a different way but hopefully quite similarly in a UITextView
OR
(b) I have seen a dummy UILabel get used simply to calculate text sizes in features requiring this kind of precision. This is usually quite effective, since changing the string of a UILabel isn't expensive and a UILabel has built in properties for size calculation based on text and font without needing to do a layout pass.
Again, apologies if the first original answer seemed sassy, it does come off that way I see now. I will confirm, though, that my original answer still stands (the selectedRange mechanism) SHOULD the desired solution be in terms of a long press. For a custom solution based on a single touch down event, though, collecting UITouch events through a delegate callback and then processing those with knowledge of what String is present is the best approach from what I can tell.
I've been following the iOS7 Day-by-Day multi-page TextKit tutorial, and ran into an issue with accessibility. The code for the tutorial is here: iOS7 Day-by-Day
The problem is that each of the text views (one per column, two per "page") seems to contain the entire string, and with VoiceOver enabled, every time a column gets the focus, the text is read from the very beginning of the string to the very end, instead of reading the text that is actually visible in a column.
The textviews/columns are created using the new iOS7 method
UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame
textContainer:textContainer];
How can I get VoiceOver to read only the visible text in each column?
Sounds like you simply need to determine what text is visible and then pass that to VoiceOver.
To do that, you can use the two possible methods found in this related question and with the range of the visible text, you can then create a substring via something like:
NSString *textToPassToVoiceOver = [[textView.text] rangeOfSubstring:visibleTextRange];
Makes sense?
I am developing xmpp-client app. One of the features is sending smiles and user should have ability to edit its like usuall text. Emoticons editing in Viber App is best example of what i want to implement.
I already tried three ways to solve problem:
I create emoticon like usual UIImageView and place it as a subview on UITextView using current caret rect. I use 5 whitespaces as a text placeholder in text view. There are two problems: with placing emoticons on new line when inserting text in the middle(printing whitespace not make caret move to new line); when user placing caret using magnify glass, he can move caret through emoticon(through 5 whitespaces), as delegate method not called during this process.
I have tried EGOTextView. There are problems with caret position and resizing when new line should be added. And there are some rendering artifacts when using it one line size.
I also have tried using UIWebView. But there were great problems with resizing based on text size and other artifacts with speed of response when becoming first responder.
May be some one could give me advice of really working solution?
I'm not really into rects and ranges mechanism of UITextView/UITextInput, but I try to give you an (untested) advice that maybe could achieve the expected result.
Built-in iOS emojis are simple characters, so we can follow the same path by building a custom font (or extend an existing one).
We have two options:
If you want to target iOS 6.0 (that has native support for NSAttributedString in UIKit classes), you could try to build a custom font containing all the emoticons you need, and use it inside your NSAttributedString (attributed string can mix different fonts, font sizes, styles and so on).
You could do something similar with iOS 5, but since you can't use NSAttributedString inside UITextView (so you are limited to just one font for the entire text) you should use a font that combines together the actual characters and the custom emoticons: so you should extend the font you want to use for typing, by adding all the emoticons to it. I don't know if this could have licenses implications, anyway.
Otherwise, you could always go much more low-level, implementing your own custom textView using CoreText, but I think it would be a hard work.
I am creating a simple quote app as a learning experience and need to format it to look better.
I am trying to make the background have a "white square" where the text is and make the text black. Just like the Twitter app has when you click on a tweet.
What is the best way to do this and what should I start with?
I know it is very simple, I'm only 15 and am trying to learn iOS. As you can see I have a server and have the app up and running, just want to format before I call it complete. Thanks! :)
-Henry
This will depend on how you created the label that displays your text, but you can do this very easily:
If you created your UI in a Storyboard / XIB file in XCode: assuming you dragged out a UILabel or UITextView, you can use the Attributes Inspector to set the text color and the background color (in the View section) of the element holding the text.
If you created the label (or text view) in code, you can set the textColor property and the backgroundColor properties programmatically.