Creating floating text box in ios application - ios

Question

I want to add an option when clicking on a cell it will show floating text box above the keyboard and its blurs the background.
Anyone familiar with this and how to implement it?
You can view image at the following link:

Answer 1

Start with adding some properties to your class:
var textField = UITextField()
var composeBarView = UIView()
var blurView = UIView()
let barHeight:CGFloat = 44
Next create the blur view, textField and container view. Do this in the viewWillAppear:
blurView = UIView(frame: self.view.frame)
blurView.alpha = 0.5
blurView.backgroundColor = UIColor.blackColor();
self.view.addSubview(blurView);
blurView.hidden = true;// Note its hidden!
textField = UITextField(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, barHeight))
composeBarView = UIView(frame: CGRectMake(0, UIScreen.mainScreen().bounds.height-64, UIScreen.mainScreen().bounds.width, barHeight));
composeBarView.addSubview(textField);
self.view.addSubView(composeBarView);
Then you should register for the UIKeyboardWillShowNotification and UIKeyboardWillHideNotification notifications:
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillToggle:", name: UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillToggle:", name: UIKeyboardWillHideNotification, object: nil);
Implement the keyboardWillToggle method:
func keyboardWillToggle(notfication: NSNotification){
if let userInfo = notfication.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as NSValue).CGRectValue()
let startFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as NSValue).CGRectValue();
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
var signCorrection:CGFloat = 1;
if (startFrame.origin.y < 0 || startFrame.origin.x < 0 || endFrame.origin.y < 0 || endFrame.origin.x < 0){
signCorrection = -1;
}
let widthChange = (endFrame.origin.x - startFrame.origin.x) * signCorrection;
let heightChange = (endFrame.origin.y - startFrame.origin.y) * signCorrection;
let sizeChange = UIInterfaceOrientationIsLandscape(self.interfaceOrientation) ? widthChange : heightChange;
var frame = composeBarView.frame
frame.origin.y += (sizeChange - barHeight ?? 0.0 )
composeBarView.frame = frame;
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
Note that we must account for the bar height, when you show the keyboard. You will need to adjust the view back to its original position.
Then when the didSelectRowAtIndexPath is called you call:
textFiled.becomeFirstResponder()
blureView.hidden = false;

Answer 2

Not tested yet but i think that you can do it with a modal segue?
For an exemple, when your textfield become editing you can segue to a new CellViewcontroller which can appear above your actual Tableview and insert this parameters :
func prensentationController(controller: UIPresentationController, viewControllerdaptivePresentationStyle style: UIModalPresentationtyle) -> UIViewController
let navcon = UINavigationController(UIPresentationViewController: controller.presentedViewController)
let visualEffectView = UIVisualEffectView(effect:UIBlurEffect(style: .ExtraLight))
visualEffectView.frame = navcon.view.bounds
navcon.view.insertSubview(visualEffectView, atIndex: 0)
return navcon
}