Detect certain characters in a text field

Posted by Craig on Stack Overflow See other posts from Stack Overflow or by Craig
Published on 2012-08-20T02:45:16Z Indexed on 2013/11/03 21:55 UTC
Read the original article Hit count: 228

Filed under:

objective-c

|

ios

|

xcode

What is the easiest way to detect a character in a text field?

I want to be able to detect a certain character and replace that character with another specific character.

So If I write in a text field... "zyxw" I want it to be replaced with "abcd".

I'm a newbie and don't really know where to start with this or how to go about it. If anyone has any methods of doing this, I would really appreciate it.

© Stack Overflow or respective owner

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More

Related posts about ios

Regarding Xcode SDK IOS 4.2 installation and missing iOS 4.1

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, i have download Xcode SDK 4.2(xcode_3.2.5_and_ios_sdk_4.2_final.dmg) from Apple developer site and installed successfully . when open my old xcode project it shows baseSDk missing ,when i try to change project setting ,i have found and set base SDk as 4.2 it works fine my problem is ,in… >>> More
fatal: pathspec for removing folder in git

as seen on Super User - Search for 'Super User'
I want to remove a folder from a Git repository but I get an error. I tried several commands, and here you can see my errors: selnaz:iOS Lnaz$ ls iOS-Tidinfo mockup readme.txt selnaz:iOS Lnaz$ git rm -r -- iOS-Tidinfo/ fatal: pathspec 'tidinfo/iOS/iOS-Tidinfo/' did not match any files selnaz:iOS… >>> More
Autorotate works for iOS 6 but gives weird behavior in iOS 5

as seen on Stack Overflow - Search for 'Stack Overflow'
I seem to be having the opposite problem from this post: Autorotate in iOS 6 has strange behaviour When I submitted my paid app to Apple, XCode made me update to iOS 6 on my test devices. I used the GUI in XCode to set my app to display only in portrait mode on the iPhone and only in landscape… >>> More
App is getting run in iOS 5.1.1 but crashed in iOS 6.1.3

as seen on Stack Overflow - Search for 'Stack Overflow'
I have implemented below code but app has been crashed in iPad with iOS version 6.1.3,while running perfectly in iPad with iOS version 5.1.1. when I am scrolling table view continuously it is crashed in ios version 6.1.3. what could be the issue. The implemented delegate and data source methods for… >>> More
No provisioned iOS devices are available with a compatible iOS version

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to test my app on an iPhone 3G, however I'm getting this error: No provisioned iOS devices are available with a compatible iOS version. Connect an iOS device with a recent enough version of iOS to run your application or choose an iOS simulator as the destination. Note that: The 3G… >>> More