How do you add an action to a button programmatically in xcode

Question

I know how to add an IBAction to a button by dragging from the interface builder  but I want to add the action programmatically to save time and to avoid switching back and forth constantly  The solution is probably really simple  but I just can t seem to find any answers when I search it  Thank you

User · Answer

CGRect buttonFrame   CGRectMake  10  80  100  30            UIButton  button     UIButton alloc  initWithFrame  buttonFrame            button setTitle    My Button  forState  UIControlStateNormal            button addTarget self action  selector btnSelected   forControlEvents UIControlEventTouchUpInside            button setTitleColor   UIColor redColor  forState  UIControlStateNormal    view addSubview button

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UIButton  btnNotification  UIButton buttonWithType UIButtonTypeCustom   btnNotification frame CGRectMake 130 80 120 40   btnNotification backgroundColor  UIColor greenColor    btnNotification setTitle   create Notification  forState UIControlStateNormal    btnNotification addTarget self action  selector btnClicked  forControlEvents UIControlEventTouchUpInside    self view addSubview btnNotification        - void btnClicked          Here You can write functionality

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UIButton inherits from UIControl  That has all of the methods to add remove actions  UIControl Class Reference  Look at the section  Preparing and Sending Action Messages   which covers     sendAction to forEvent  and     addTarget action forControlEvents

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UIButton  button    UIButton buttonWithType UIButtonTypeRoundedRect    button addTarget self         action  selector aMethod1   forControlEvents UIControlEventTouchUpInside    button setTitle   Show View  forState UIControlStateNormal   button frame   CGRectMake 80 0  210 0  160 0  40 0    view addSubview button

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Try this   Swift 4  myButton addTarget self                     action   selector myAction                      for   touchUpInside    Objective-C   myButton addTarget self               action  selector myAction      forControlEvents UIControlEventTouchUpInside     You can find a rich source of information in Apple s Documentation  Have a look at the UIButton s documentation  it will reveal that UIButton is a descendant of UIControl  which implements the method to add targets   --  You ll need to pay attention to whether add colon or not after myAction in action  selector myAction   Here s the reference

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For Swift 3  Create a function for button action first and then add the function to your button target  func buttonAction sender  UIButton         print  Button tapped      button addTarget self  action   selector buttonAction  for   touchUpInside

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CGRect buttonFrame   CGRectMake  x-pos  y-pos  width  height          CGRectMake 10 5 10 10     UIButton  button     UIButton alloc  initWithFrame  buttonFrame     button setTitle    My Button  forState  UIControlStateNormal      button addTarget self action  selector btnClicked     forControlEvents UIControlEventTouchUpInside      button setTitleColor   UIColor BlueVolor  forState   UIControlStateNormal      view addSubview button        - void btnClicked          your code

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IOS 14 SDK  you can add action with closure callback  let button   UIButton type   system  primaryAction  UIAction title   quot Button Title quot   handler      in             print  quot Button tapped  quot                Getting a reference to the control sender let textField   UITextField   textField addAction UIAction title   quot  quot   handler    action in     let textField   action sender as  UITextField     print  quot Text is   textField text  quot       for   editingChanged   source

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try this   first write this in your  h file of viewcontroller  UIButton  btn    Now write this in your  m file of viewcontrollers viewDidLoad   btn   UIButton alloc initWithFrame CGRectMake 50  20  30  30     btn setBackgroundColor  UIColor orangeColor      adding action programatically  btn addTarget self action  selector btnClicked   forControlEvents UIControlEventTouchUpInside    self view addSubview btn     write this outside viewDidLoad method in  m file of your view controller   -  IBAction btnClicked  id sender        Write a code you want to execute on buttons click event

User · Answer

Swift answer   myButton addTarget self  action   click    for   touchUpInside   func click sender  UIButton        print  click       Documentation  https   developer apple com documentation uikit uicontrol 1618259-addtarget

[ios] How do you add an action to a button programmatically in xcode

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