my IOS notes

addressbook.swift

 
 // open it
var error: Unmanaged<CFError>?
addressBook = ABAddressBookCreateWithOptions(nil, &error)?.takeRetainedValue()
  if self.addressBook == nil {
    println(error?.takeRetainedValue())
    return
  }

 // check if access is granted
 ABAddressBookRequestAccessWithCompletion(addressBook) {
    granted, error in
            
    if !granted {
    
      return
    }
    // This cause segmentation fault if converting to NSArray.  Use [ABRecordRef] Instead.
    let people:[ABRecordRef] = ABAddressBookCopyArrayOfAllPeople(self.addressBook)?.takeRetainedValue() as [ABRecordRef]
}

gistfile1.txt

Objective C


[UIApplication sharedApplication].idleTimerDisabled = YES; // Turn off sleep mode

[UIApplication sharedApplication].idleTimerDisabled = NO; // Turn on

Swift

UIApplication.sharedApplication().idleTimerDisabled = true // Turn off sleep mode

UIApplication.sharedApplication().idleTimerDisabled = false // Turn

UILocalNotification

// Set up Actions for notifications
 
let viewDetailAction:UIMutableUserNotificationAction = UIMutableUserNotificationAction()
viewDetailAction.identifier = "VIEW_ACTION"
viewDetailAction.title = "View Detail"
viewDetailAction.activationMode = UIUserNotificationActivationMode.Foreground
viewDetailAction.destructive = false
viewDetailAction.authenticationRequired = true
        
let cancelAction:UIMutableUserNotificationAction = UIMutableUserNotificationAction()
cancelAction.identifier = "CANCEL_ACTION"
cancelAction.title = "Cancel"
cancelAction.activationMode = UIUserNotificationActivationMode.Background
cancelAction.destructive = true
cancelAction.authenticationRequired = false
        
// set up category
let category = UIMutableUserNotificationCategory()
category.identifier = "FIRST_CATEGORY"    // id to be to reference later

// add actions to the array
let defaultAction:NSArray = [viewDetailAction, cancelAction]
category.setActions(defaultAction, forContext: UIUserNotificationActionContext.Default)
// For minimal (if there are more than two actions, use UIUserNotificationActionContext.Minimal)

// put category in to NSSet; we only have one category now
let categories = NSSet(object: category)

// set type of notification will be using
let types = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound

// create UIUserNotificationSettings
let settings = UIUserNotificationSettings(forTypes: types, categories: categories)

// Finally, register setting
UIApplication.sharedApplication().registerUserNotificationSettings(settings)

// Now create UILocalNotification
let notification  = UILocalNotification()
notification.category = "FIRST_CATEGORY"   // we will using this category that we defined earlier
notification.alertBody = "This is first Notice!"
notification.soundName = UILocalNotificationDefaultSoundName // we will use default sound

// if you want to schedule, set the time in notification.fireDate and scheduleLocalNotification()
UIApplication.sharedApplication().presentLocalNotificationNow(notification) // this will show notification now

UnsafeMutablePointer

//  -(void) someFunction(unsigned char *) data length:(int) length

func someFunctionBridgingFromOjectiveC(data: UnsafeMutablePointer<UInt8>, length: Int32) {

  var s:NSString! = NSString(bytes: data, length: Int(length), encoding: NSUTF8StringEncoding)
  data.destroy()
  NSLog(s!)

}

Where's the best place to put UIApplication.sharedApplication().idleTimerDisabled in the ViewController? Inside of ViewDidLoad or somewhere else?

It should put inside your control flow where you do not want the app to go to sleep, and turn on sleep mode while the task is finished. If you want to keep the ViewController always on until it is removed, then yea, you can do it in ViewDidLoad, but just remember to turn it back on before the ViewController is removed.