is single radio button available in cocoa? - objective-c

Question

I am trying to drag-drop a single radio button from object library in cocoa. But there is "radio group" object is available to drag-drop. In radio group has two radio button.
Is there any way to create a single radio button in cocoa application or hide the one radio button from radio group?
Thanks

Answer 1

You can make it one by going to attribute inspector and set the cell count to 1. but you have to handle the behaviour by your self logically.

Answer 2

Single radio button is not available in object library in cocoa. You can just use a normal UIButton and give its normal and selected images in Interface Builder.
Alternatively, you can just use a custom library for radio button like this one : https://github.com/onegray/RadioButton-ios

Answer 3

You should use a simple UIButton.
You can set different texts/images depending on a button status, like Devanshi suggested. The if/else approach is a bad idea though, because cocoa already provides these and are much more simple and small.
There are two ways, either storyboard (if you use it) or programatically, wherever you create your button (most likely viewDidLoad).
If you are using Storyboard
Storyboard is pretty straightforward, select your button, and under the "State" you can chose different settings. Each settings will actually load different parameters for the next settings. Like the title and image for example.
Just go on state "default" and set an unchecked box as image.
(You can)go on state "Highlighted" and set a temporary highlighted box as image; this is not mandatory.
Then go on state "Selected" and set a checked box as image.
And you're done.
If you are using only code
The programatic way to do this is fairly simple.
I assume we have a button called btSend,
UIControlStateNormal, UIControlStateSelected, UIControlStateDisabled, UIControlStateHighligted, are the states you can use. I used disabled and normal (enabled) here.
[self.btSend setImage:[UIImage imageNamed:#"SendIcon.png"] forState:UIControlStateNormal];
[self.btSend setImage:[UIImage imageNamed:#"SendIconGrayed.png"] forState:UIControlStateDisabled];
With this, you'll be up and running too.
After setting that up
Now that your buttons know what to show depending on their state, you need to add a selector method for your action (an IBAction), in which you will need to invert the state of your current button. You probably already have that, just add a boolean.
checkBoxSelected is a boolean that I created as an instance variable (on top of .m file). You can set it to "NO" in viewDidLoad if your radio is not selected by default, and to YES if it is selected by default.
#implementation TermViewController{
BOOL checkBoxSelected;
}
here is the method that is called when I press the button
- (IBAction)tapRadioButton:(id)sender {
checkBoxSelected = !checkBoxSelected;
[_btCheckbox setSelected:checkBoxSelected];
}
You probably have "something" that checks if your checkbox is selected, to know that, you can either get the state of your button by using self.yourButton.state. This will return a UIControlState, just check if it's Normal or Selected or Disabled or HIghlighted.
Or you can check the Boolean "checkboxselected" if it's YES or NO :)
If you have many radio buttons, you can save all those boolean values in a dictionary. the key would be your button number for example, and the object would be YES or NO. if you press the button, (like shown before), change the button state and also change it in the dictionary. At the end you have all your states in the dictionary.
I didn't explain all that in my first writing because that wasn't really a part of your question :) I hope this helps.

Answer 4

For radio button can use simple UIButton and maintain state of it and replace the image of on click event.
1) Declare globally in view
BOOL isChecked;
2) On button click event
if (isChecked)
{
[_btnRadioBox setImage:[UIImage imageNamed:#"chk_uncheck.png"] forState:UIControlStateNormal];
}
else
{
[_btnRadioBox setImage:[UIImage imageNamed:#"chk_check.png"] forState:UIControlStateNormal];
}
isChecked=!isChecked;
3) And get the status of it.
if (isChecked)
{
// Here write code of radio button when selected
}
else
{
// Here write code of radio button when unselected
}

Answer 5

You can use MVRadioButton to add animated radio button in iOS. This is very simple Drop in and easy to integrate Custom Control.
Its using CoreAnimation and Layers to Give it look and feel exactly like a Traditional Radio button that we have seen on Web.