I want to make this feature, i did try many ways, but i couldn't find answer.
UITextView + NSAttritubtedString
I think this is best way, but cannot applied to iOS 5. Only over iOS 6.
TTTAttributedLabel (UITextView + Overlay UILabel + CoreText)
Work well in English/Korean characters, but problem occured in japanese/chinese.
JSTokenField (or other Token Libraries)
We need UITextView for supporting multiline, but these are UITextField.
I spent more than 4 days for this problem.. Thanks for reading.
I you really have to support iOS versions prior to iOS 6, then maybe you should take a look at the UITextInput protocol (and related stuff): https://developer.apple.com/library/ios/documentation/uikit/reference/UITextInput_Protocol/Reference/Reference.html
Using this, I've managed to implement a custom component for bankcard-number input, and I think it's certainly possible what you're trying to achieve (although it would take a few days of experimenting to get a good grasp of this stuff).
Related
In iOS 7 some of the most important string drawing and metrics calculation methods were depracated with no obvious alternative given.
The page on NSString UIKit Additions Reference is red like blood. Almost everything deprecated. Xcode throws 300 warnings at me.
I try to find out what was running through Apples mind and what they changed in UIKit text system but where would I start? Did they mention somewhere why all of this is deprecated and how the text system works different now? And how to adapt? How to calculate text bounding box when label can scale the font to fit size? Is TextKit the solution?
I spent 3 hours on Google but I found no useful information on how to solve this problem.
We should document all alternatives here so all developers who run into this depressive deprecation mess find peace of mind quickly.
If you look at the deprecations, most of them deprecate the use of UIFont to use a dictionary of attributes instead.
drawInRect:withFont: (Deprecated in iOS 7.0. Use drawInRect:withAttributes: instead.)
drawInRect:withFont:lineBreakMode: (Deprecated in iOS 7.0. Use drawInRect:withAttributes: instead.)
sizeWithFont:(Deprecated in iOS 7.0. Use sizeWithAttributes: instead.)
etc…
So if you're looking for a place to start, learn how to use dictionaries of attributes to set up fonts. It looks like a lot of deprecations, but you don't actually need to learn that much new stuff.
If you want to update your code to use the new TextKit system, check out the WWDC videos and the TextKit Programming Guide.
If you want to know Apple's reason for deprecating so much, I'd guess that it has to do with how UILabel and UITextView used to be built on web views, now they're built on TextKit.
I just learned about UICollectionView after creating the same functionality in a custom class. So I am thinking about using deleting all that code I wrote and just using UICollectionView.
I know my app gets a lot of installs on iOS 5. And I know a lot non tech savvy friends and family still have it installed.
I googled this and it says I can use some other's guys library(another thing I should have known before writing my custom class). But the answer was not definitive.
So my question is, does Apple include a bridge for iOS 5 or will my app just fail if I use UICollectionView?
I have my target deployment set to 5.0 and it is not giving me any warnings.
Venkat
UICollectionView is iOS6 only. You can include extra code to check for iOS6 and use your custom class on iOS5. But there is no way to use an actual UICollectionView in iOS5.'
Thats what that "other guy's library" does. It has an iOS5 compliant clone of UICollectionView and checks based on the OS which to use.
Maybe you want to try this as an alternative:
https://github.com/steipete/PSTCollectionView
I'd like different words in a UILabel to be different colors. Does this mean each word will need to be a different UILabel? I'm guessing yes, though sure would be nice to just put color codes in the label somehow, you know? I guess I'm a bit spoiled by text markup in HTML.
There is no proper UIRichTextView in iOS. It's high on my wish-list for iOS 6 (and there's some reason to believe we may get it then due to the release of Pages).
Your options are to use multiple UILabel views, NSString UIKit Additions, Core Text, UIWebView, or one of a few third-party frameworks such as:
NSAttributedString-Additions-for-HTML
CoreTextWrapper
OHAttributedLabel
OmniUI
All of the current solutions have different problems. The most common problem is that it's hard to get select and copy functionality to work with rich text unless you use a web view. Web views are incredibly annoying because they're asynchronous and you have to do a lot of your interactions in JavaScript.
I wish there were a better answer.
(Obligatory shilling: This topic is covered in depth in Chapter 18 of iOS 5 Programming Pushing the Limits.)
UILabel doesn't support segmented formatting (the entire thing can only have one format).
Have a look at OHAttributedLabel, which does what you want.
As far as I'm aware you'd need to have separate labels for each different coloured word. Depending what you're trying to do you may be able to make use of myLabel.textColor to change the colour of the periodically or on events etc.
HI all,
Are there any premade/ready to use UITextFields and UITexView which have the toolbar(for hiding the keyboard) and autoscrolling features just like the one safari(iphone) have.
I know its possible to make it custom but I wanted to use a builted one due to lack of time.
Thanks,
No, not in the iOS SDk for iPhone.
There is the Three20 library which has some nice controls. This a bit big for just those controls.
Does anyone know what made Apple leave out NSAttributedString when turning AppKit into UIKit?
The reason I ask is that I would really like to use it in my iPhone app, and there appears to be no replacement or alternative than doing it myself...
It is possible to have mixed font attributes on a string - it's just a hell of a lot of work to to achieve something similar that was possible with a few lines of code with NSAttributedString.
Also, doing all this extra drawing code myself makes my table view cells really heavy, and really hurts performance.
Anyone got any ideas? Any genius's working on an opensource alternative to NSAttributedString?
NSAttributedString is now on the iPhone as of 4.0 Beta
The current from the documentation recommended way to do it is to use a UIWebView.
I don't know if this is still relevant for you, but Joe Hewitt has published his three20 library in the meantime, which contains TTStyledText and TTStyledTextLabel to fit your needs.
I'm afraid you're going to have to roll your own. If you're getting bogged down when doing table drawing, I'd probably switch to raw Quartz calls; try and dump all your drawing into a single view, and do all your complex string drawing within it. NSAttributedString is handy, but I don't think it's using all that much special AppKit-mojo to get much better performance than straight string drawing calls.
The answer above indicates that NSAttributedString is available on OS 4.0 and above, but per the documentation it's available on 3.2:
NSAttributedString Class Reference
Inherits from NSObject
Conforms to NSCoding, NSCopying, NSMutableCopying, NSObject (NSObject)
Framework /System/Library/Frameworks/Foundation.framework
Availability Available in iPhone OS 3.2 and later.
Companion guide Attributed String Programming Guide
Declared in NSAttributedString.h
Another approach would be to use a UIWebView with HTML. Or, if you are daring you can make use of the undocumented setHTML method on UITextView to set small snippets of formatted text...
To me this seems more like the future of where supporting formatted text will go, some way to leverage Webkit in outputting formatted strings.