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Fixed TextView floating behavior #30

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Fixed TextView floating behavior #30

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58 changes: 33 additions & 25 deletions FloatLabelFields/FloatLabelTextView.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -105,25 +105,16 @@ import UIKit

override func layoutSubviews() {
super.layoutSubviews()
adjustTopTextInset()
hintLabel.alpha = text.isEmpty ? 1.0 : 0.0
let r = textRect()
hintLabel.frame = CGRect(x:r.origin.x, y:r.origin.y, width:hintLabel.frame.size.width, height:hintLabel.frame.size.height)
setTitlePositionForTextAlignment()
let isResp = isFirstResponder
if isResp && !text.isEmpty {
title.textColor = titleActiveTextColour
} else {
title.textColor = titleTextColour
}
// Should we show or hide the title label?
if text.isEmpty {
// Hide
hideTitle(isResp)
} else {
// Show
showTitle(isResp)
}
hintLabel.alpha = text.isEmpty ? 1.0 : 0.0
let r = textRect()
hintLabel.frame = CGRect(x:r.origin.x, y:r.origin.y, width:hintLabel.frame.size.width, height:hintLabel.frame.size.height)
setTitlePositionForTextAlignment()
let isResp = isFirstResponder
if isResp && !text.isEmpty {
title.textColor = titleActiveTextColour
} else {
title.textColor = titleTextColour
}
}

// MARK:- Private Methods
Expand Down Expand Up @@ -152,17 +143,32 @@ import UIKit
// Observers
if !isIB {
let nc = NotificationCenter.default
nc.addObserver(self, selector:#selector(UIView.layoutSubviews), name:NSNotification.Name.UITextViewTextDidChange, object:self)
nc.addObserver(self, selector:#selector(didChangeTextValue), name:NSNotification.Name.UITextViewTextDidChange, object:self)
nc.addObserver(self, selector:#selector(UIView.layoutSubviews), name:NSNotification.Name.UITextViewTextDidBeginEditing, object:self)
nc.addObserver(self, selector:#selector(UIView.layoutSubviews), name:NSNotification.Name.UITextViewTextDidEndEditing, object:self)
}
}

@objc fileprivate func didChangeTextValue() {
let isResp = isFirstResponder
// Should we show or hide the title label?
if text.isEmpty {
// Hide
hideTitle(isResp)
} else {
// Show
if (self.title.alpha == 0) {
showTitle(isResp)
}
}
}

fileprivate func adjustTopTextInset() {
var inset = textContainerInset
inset.top = initialTopInset + title.font.lineHeight + hintYPadding
textContainerInset = inset
}
fileprivate func adjustTopTextInset(editing: Bool = false) {
var inset = textContainerInset
let lineHeight:CGFloat = editing ? title.font.lineHeight/2 : 0
inset.top = initialTopInset + lineHeight + hintYPadding
textContainerInset = inset
}

fileprivate func textRect()->CGRect {
var r = UIEdgeInsetsInsetRect(bounds, contentInset)
Expand Down Expand Up @@ -193,6 +199,7 @@ import UIKit
let dur = animated ? animationDuration : 0
UIView.animate(withDuration: dur, delay:0, options: [UIViewAnimationOptions.beginFromCurrentState, UIViewAnimationOptions.curveEaseOut], animations:{
// Animation
self.adjustTopTextInset(editing: true)
self.title.alpha = 1.0
var r = self.title.frame
r.origin.y = self.titleYPadding + self.contentOffset.y
Expand All @@ -204,6 +211,7 @@ import UIKit
let dur = animated ? animationDuration : 0
UIView.animate(withDuration: dur, delay:0, options: [UIViewAnimationOptions.beginFromCurrentState, UIViewAnimationOptions.curveEaseIn], animations:{
// Animation
self.adjustTopTextInset(editing: false)
self.title.alpha = 0.0
var r = self.title.frame
r.origin.y = self.title.font.lineHeight + self.hintYPadding
Expand Down