I am having problems adding a clear button to my UITextfield.
This is my textfield:
let emailTextField: CustomTextField = {
let v = CustomTextField()
v.borderActiveColor = .white
v.borderInactiveColor = .white
v.textColor = .white
v.font = UIFont(name: "AvenirNext-Regular", size: 17)
v.placeholder = "Email-Adresse"
v.placeholderColor = .gray
v.placeholderFontScale = 1
v.clearButtonMode = UITextField.ViewMode.always
v.minimumFontSize = 13
v.borderStyle = .line
v.autocapitalizationType = .none
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
As you can see I set clearButtonMode = .always but it is not being displayed.
My CustomTextFieldClass is nothing special either:
class CustomTextField: HoshiTextField {
/// the left padding
#IBInspectable public var leftPadding: CGFloat = 0 { didSet { self.setNeedsLayout() } }
/// the right padding
#IBInspectable public var rightPadding: CGFloat = 0 { didSet { self.setNeedsLayout() } }
/// Text rectangle
///
/// - Parameter bounds: the bounds
/// - Returns: the rectangle
override public func textRect(forBounds bounds: CGRect) -> CGRect {
let originalRect: CGRect = super.editingRect(forBounds: bounds)
return CGRect(x: originalRect.origin.x + leftPadding, y: originalRect.origin.y, width: originalRect.size.width - leftPadding - rightPadding, height: originalRect.size.height)
}
/// Editing rectangle
///
/// - Parameter bounds: the bounds
/// - Returns: the rectangle
override public func editingRect(forBounds bounds: CGRect) -> CGRect {
let originalRect: CGRect = super.editingRect(forBounds: bounds)
return CGRect(x: originalRect.origin.x + leftPadding, y: originalRect.origin.y, width: originalRect.size.width - leftPadding - rightPadding, height: originalRect.size.height)
}
Does anyone know why the clear button is not being displayed???
Related
Is there a way to change the input size of my UITextield so it doesn't overlap with my "vergessen"-Button?
The Textfield is a simple TextfieldView with a width of 315. I added the "Vergessen?" Button programmatically with the code down below.
func createForgetButton () {
let button = UIButton(type: .system)
button.setTitle("Vergessen?", for: .normal)
button.addTarget(self, action: #selector(self.vergessenTapped(_:)), for: .touchUpInside)
button.titleLabel?.font = UIFont(name: "Avenir Next", size: 19.0)
passwordTextField.rightView = button
passwordTextField.rightViewMode = .unlessEditing
}
Use the following custom class for the field. Then update .rightPadding field in IB or in the code to match the width of the button you have on the right.
/**
* Text field with some changes according to design
*
* - author: Alexander Volkov
* - version: 1.0
*/
#IBDesignable public class CustomTextField: UITextField {
/// the left padding
#IBInspectable public var leftPadding: CGFloat = 0 { didSet { self.setNeedsLayout() } }
/// the right padding
#IBInspectable public var rightPadding: CGFloat = 0 { didSet { self.setNeedsLayout() } }
/// Text rectangle
///
/// - Parameter bounds: the bounds
/// - Returns: the rectangle
override public func textRect(forBounds bounds: CGRect) -> CGRect {
let originalRect: CGRect = super.editingRect(forBounds: bounds)
return CGRect(x: originalRect.origin.x + leftPadding, y: originalRect.origin.y, width: originalRect.size.width - leftPadding - rightPadding, height: originalRect.size.height)
}
/// Editing rectangle
///
/// - Parameter bounds: the bounds
/// - Returns: the rectangle
override public func editingRect(forBounds bounds: CGRect) -> CGRect {
let originalRect: CGRect = super.editingRect(forBounds: bounds)
return CGRect(x: originalRect.origin.x + leftPadding, y: originalRect.origin.y, width: originalRect.size.width - leftPadding - rightPadding, height: originalRect.size.height)
}
}
Is it possible to marquee UITextFiled placeholder, if placeholder text is longer then the size of UITextField width, There are lib for UILabel MarqueeLabel but I am not sure how to marquee placeholder, please provide some suggestion, Or you can explain what is a placeholder is actually, it doesn't look like UILabel
I am using bellow code for CustomTextField with validation error message
import UIKit
#IBDesignable
class CustomTextField: UITextField {
var placeholdertext: String?
#IBInspectable
public var cornerRadius :CGFloat {
set { layer.cornerRadius = newValue }
get {
return layer.cornerRadius
}
}
// Provides left padding for images
override func leftViewRect(forBounds bounds: CGRect) -> CGRect {
var textRect = super.leftViewRect(forBounds: bounds)
textRect.origin.x += leftPadding
return textRect
}
override func rightViewRect(forBounds bounds: CGRect) -> CGRect {
var textRect = super.rightViewRect(forBounds: bounds)
textRect.origin.x -= rightPadding
return textRect
}
#IBInspectable var leftImage: UIImage? {
didSet {
updateView()
}
}
#IBInspectable var isUnderLine:Bool = false
{
didSet{
updateView()
}
}
#IBInspectable var rightImage: UIImage? {
didSet {
updateView()
}
}
func setError(error:String?){
if(error != nil)
{
self.attributedPlaceholder = NSAttributedString(string: error!, attributes: [NSForegroundColorAttributeName: UIColor.red])
}
}
#IBInspectable var leftPadding: CGFloat = 0
#IBInspectable var rightPadding: CGFloat = 0
#IBInspectable var textLeftPadding:CGFloat = 0
#IBInspectable var color: UIColor = UIColor.lightGray {
didSet {
updateView()
}
}
#IBInspectable var underlineColor:UIColor = UIColor.black
{
didSet{
self.updateView()
}
}
private var placeholderColorValue:UIColor = UIColor.lightGray
#IBInspectable public var placeholderColor:UIColor
{
set{
self.attributedPlaceholder = NSAttributedString(string:placeholder!, attributes: [NSForegroundColorAttributeName: newValue])
placeholderColorValue = newValue
}
get{
return placeholderColorValue
}
}
override init(frame: CGRect) {
super.init(frame: frame)
self.setUpView()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func awakeFromNib() {
super.awakeFromNib()
self.setUpView()
}
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
}
func setUpView() {
if(rightImage != nil)
{
self.leftViewMode = UITextFieldViewMode.always
let rightImageView:UIImageView = UIImageView(image: rightImage)
rightImageView.frame = CGRect(x: 0, y: 0, width: self.frame.size.height, height: self.frame.size.height)
self.rightView = rightImageView
}
else {
rightViewMode = UITextFieldViewMode.never
rightView = nil
}
}
func updateView() {
if let imageLeft = leftImage {
leftViewMode = UITextFieldViewMode.always
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
imageView.image = imageLeft
// Note: In order for your image to use the tint color, you have to select the image in the Assets.xcassets and change the "Render As" property to "Template Image".
imageView.tintColor = color
leftView = imageView
} else {
leftViewMode = UITextFieldViewMode.never
leftView = nil
}
if let imageRight = rightImage {
rightViewMode = UITextFieldViewMode.always
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
imageView.image = imageRight
// Note: In order for your image to use the tint color, you have to select the image in the Assets.xcassets and change the "Render As" property to "Template Image".
imageView.tintColor = color
rightView = imageView
} else {
rightViewMode = UITextFieldViewMode.never
rightView = nil
}
// Placeholder text color
attributedPlaceholder = NSAttributedString(string: placeholder != nil ? placeholder! : "", attributes:[NSForegroundColorAttributeName: color])
if(self.isUnderLine)
{
let underline:UIView = UIView()
underline.frame = CGRect(x: 0, y: self.frame.size.height-1, width: self.frame.size.width, height: 1)
underline.backgroundColor = underlineColor
self.addSubview(underline)
}
}
override func textRect(forBounds bounds: CGRect) -> CGRect {
return CGRect(x: textLeftPadding, y: 0, width: bounds.width, height: bounds.height)
}
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return self.textRect(forBounds: bounds)
}
}
and using validation as
if (txtField.text != "condtion" ){
txtField.setError(error:"Error message for text field");
valid = false;
txtField.becomeFirstResponder()
}
I got two UITextfields with separator(UILabel) between them.
I put them all into UIStackView.
While in editing mode, content of the textfield is cut from the top, as seen in the picture below
I've found that the only way to remove this issue is to make this separator big enough, but this spoils my design.
How to fix it?
It's worth to mention my UIStackView settings:
and show how I implement this custom bottomline-style UITextfield
class CustomTextField: UITextField {
override func awakeFromNib() {
super.awakeFromNib()
let attributedString = NSAttributedString(string: self.placeholder!, attributes: [NSForegroundColorAttributeName:UIColor.lightGray, NSFontAttributeName: UIFont(name: "GothamRounded-Book", size: 18.0)! ])
self.attributedPlaceholder = attributedString
self.tintColor = UIColor.appRed
self.font = UIFont(name: "GothamRounded-Book", size: 18.0)!
self.borderStyle = .none
self.textAlignment = .center
}
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 0, dy: 5)
}
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 0, dy: 5)
}
override var tintColor: UIColor! {
didSet {
setNeedsDisplay()
}
}
override func draw(_ rect: CGRect) {
let startingPoint = CGPoint(x: rect.minX, y: rect.maxY)
let endingPoint = CGPoint(x: rect.maxX, y: rect.maxY)
let path = UIBezierPath()
path.move(to: startingPoint)
path.addLine(to: endingPoint)
path.lineWidth = 2.0
tintColor.setStroke()
tintColor = UIColor.appRed
path.stroke()
}
}
Any help much appreciated
EDIT
I have another TextField like that and it works fine, but it doesn't sit inside any horizontal UIStackView. Here is the screenshot of hierarchy:
Unfortunately you need to check the size on editing
class CustomTextField: UITextField {
override func awakeFromNib() {
super.awakeFromNib()
self.addTarget(self, action: #selector(textFieldEditingChanged), for: .editingChanged)
}
func textFieldEditingChanged(_ textField: UITextField) {
textField.invalidateIntrinsicContentSize()
}
override var intrinsicContentSize: CGSize {
if isEditing {
let string = text ?? ""
let size = string.size(attributes: typingAttributes)
return CGSize(width: size.width + (rightView?.bounds.size.width ?? 0) + (leftView?.bounds.size.width ?? 0) + 2,
height: size.height)
}
return super.intrinsicContentSize
}
}
I'm working on a customizable UITextField (see code below). I have added a border at the bottom (you can set it in the storyboard). However, I had problems setting the frame of the CALayer that this border consists of.
If I set it inside the didSet method of var showBottomBorder it doesn't appear on the screen. I think this is because the frame (of the UITextField) hasn't been calculated yet (maybe didSet gets called before that).
So I moved it to the layoutSubviews() method (see code below). This works perfectly.
But now I have another problem. I can't really change that frame anymore. Every time I change it, it gets reset by layoutSubviews() which I think is called then.
At the bottom of my code, there is the method textFieldDidBeginEditing. In there, I wanted to move up my bottom border (animated). But it doesn't work. The border does not move anywhere. And like I said, I think it's because I set the frame inside the layoutSubviews() method.
Is there a better way to set the frame of the bottom border? A way which allows me to change stuff?
#IBDesignable
class CustomizableTextField: UITextField, UITextFieldDelegate {
// MARK: - Properties
private var bottomBorder = CALayer()
// MARK: - #IBInspectables
#IBInspectable var roundCorners: CGFloat = 0 {
didSet {
self.layer.cornerRadius = roundCorners
self.clipsToBounds = true
}
}
/** -- */
#IBInspectable var borderWidth: CGFloat = 1.0 {
didSet {
self.layer.borderWidth = self.borderWidth
}
}
#IBInspectable var borderColor: UIColor = UIColor.white {
didSet {
self.layer.borderColor = self.borderColor.cgColor
}
}
/** -- */
/** -- */
private var showBottomBorder: Bool = false {
didSet {
switch showBottomBorder {
case true:
bottomBorder.borderColor = self.bottomBorderColor.cgColor
bottomBorder.borderWidth = self.bottomBorderWidth
self.layer.addSublayer(bottomBorder)
self.layer.masksToBounds = true
break
case false:
bottomBorder.removeFromSuperlayer()
break
}
}
}
#IBInspectable var bottomBorderWidth: CGFloat = 1.0 {
didSet {
self.showBottomBorder = false
self.showBottomBorder = true
}
}
#IBInspectable var bottomBorderColor: UIColor = UIColor.white {
didSet {
self.showBottomBorder = false
self.showBottomBorder = true
}
}
/** -- */
/** -- */
// Somwhow, the default panel for my font color doesn't change anything, so I created this
#IBInspectable var fixedFontColor: UIColor = UIColor.white {
didSet {
self.textColor = fixedFontColor
}
}
#IBInspectable var placeholderFontColor: UIColor = UIColor.white {
didSet {
var placeholderTxt = ""
if let txt = self.placeholder {
placeholderTxt = txt
}
self.attributedPlaceholder = NSAttributedString(string: placeholderTxt, attributes: [NSForegroundColorAttributeName: placeholderFontColor])
}
}
/** -- */
// MARK: - Overrides and Initializers
override init(frame: CGRect) {
super.init(frame: frame)
}
override func layoutSubviews() {
super.layoutSubviews()
// HERE
bottomBorder.frame = CGRect(x: 0, y: self.frame.size.height - self.bottomBorderWidth, width: self.frame.size.width, height: self.frame.size.height)
}
// setting the textField delegate to self
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
//self.borderStyle = .none
self.delegate = self
}
// MARK: - Events
func textFieldDidBeginEditing(_ textField: UITextField) {
}
You can use and extension on UITextFiled for setting the border.
And keep a reference to it with KVC.
By overriding LayoutSubview, every the layout will change, we'l check if the border exists, if so remove it, and re-create a new one with the new frame:
import UIKit
let MyTopBorder = "myTopBorder"
let MyBottomBorder = "myBottomBorder"
struct Defaults {
static let width = CGFloat(1.0)
static func bottonBorderFrame(view: UIView)->CGRect {
return CGRect(x: CGFloat(0), y: view.frame.size.height - Defaults.width, width: view.frame.size.width, height: view.frame.size.height)
}
static func topBorderFrame(view: UIView)->CGRect {
return CGRect(x: CGFloat(0), y: CGFloat(0) , width: view.frame.size.width, height: Defaults.width)
}
}
extension UITextField
{
func setBottomBorder(color:CGColor)
{
if let isBottomBorder = self.getBottomBorderIfExists() {
isBottomBorder.removeFromSuperlayer()
}
self.setBorderWithFrame(Defaults.bottonBorderFrame(self), color: color, andKey: MyBottomBorder)
}
func setTopBorder(color:CGColor)
{
if let isTopBorder = self.getTopBorderIfExists() {
isTopBorder.removeFromSuperlayer()
}
self.setBorderWithFrame(Defaults.topBorderFrame(self), color: color, andKey: MyTopBorder)
}
func setBorderWithFrame(frame: CGRect, color: CGColor, andKey: String) {
self.borderStyle = UITextBorderStyle.None;
let border = CALayer()
border.borderColor = color
border.frame = frame
border.borderWidth = Defaults.width
self.layer.addSublayer(border)
self.layer.masksToBounds = true
self.layer.setValue(border, forKey: andKey)
}
func removeTopBorder() {
if let isTopBorder = self.getTopBorderIfExists() {
self.layer.setValue(nil, forKey: MyTopBorder)
isTopBorder.removeFromSuperlayer()
}
}
func removeBottomBorder() {
if let isBottomBorder = self.getBottomBorderIfExists() {
self.layer.setValue(nil, forKey: MyBottomBorder)
isBottomBorder.removeFromSuperlayer()
}
}
private func getBorderIfExistsByKey(key: String)->CALayer? {
if let isBorderSet = self.layer.valueForKey(key) {
if let borderIsCALayer = isBorderSet as? CALayer {
return borderIsCALayer
}
}
return nil
}
private func getTopBorderIfExists()->CALayer? {
return self.getBorderIfExistsByKey(MyTopBorder)
}
private func getBottomBorderIfExists()->CALayer? {
return self.getBorderIfExistsByKey(MyBottomBorder)
}
public override func layoutSubviews() {
super.layoutSubviews()
// Update bottom on frame change
if let isBottomBorder = self.getBottomBorderIfExists() {
let borderColor = isBottomBorder .borderColor
self.removeBottomBorder()
self.setBottomBorder(borderColor!)
}
// Update top on frame change
if let isTopBorder = self.getTopBorderIfExists() {
let borderColor = isTopBorder.borderColor
self.removeTopBorder()
self.setTopBorder(borderColor!)
}
}
}
Usage:
let textField = UITextField(frame: CGRect(x: 100,y: 100, width: 100, height: 100))
textField.backgroundColor = UIColor.blueColor() // Thie color is for visulizing better
self.view.addSubview(textField)
textField.setBottomBorder(UIColor.blackColor().CGColor) // Now you have a border
textField.frame = CGRect(x: 150, y: 200, width: 200, height: 200) // And the border updated to the new frame
// Now if you would like to change from bottom to top, simply do this:
textField.removeBottomBorder()
textField.setTopBorder(UIColor.blackColor().CGColor)
I'm trying to implement Range Slider and I used custom control called NMRangeSlider.
But when I use it, the slider doesn't appear at all. Could it be also because it's all written in Objective-C?
This is how I've currently implemented it:
var rangeSlider = NMRangeSlider(frame: CGRectMake(16, 6, 275, 34))
rangeSlider.lowerValue = 0.54
rangeSlider.upperValue = 0.94
self.view.addSubview(rangeSlider)
To create a custom Range Slider I found a good solution here: range finder tutorial iOS 8 but I needed this in swift 3 for my project. I updated this for Swift 3 iOS 10 here:
in your main view controller add this to viewDidLayOut to show a range slider.
override func viewDidLayoutSubviews() {
let margin: CGFloat = 20.0
let width = view.bounds.width - 2.0 * margin
rangeSlider.frame = CGRect(x: margin, y: margin + topLayoutGuide.length + 170, width: width, height: 31.0)
}
create the helper function to print slider output below viewDidLayoutSubviews()
func rangeSliderValueChanged() { //rangeSlider: RangeSlider
print("Range slider value changed: \(rangeSlider.lowerValue) \(rangeSlider.upperValue) ")//(\(rangeSlider.lowerValue) \(rangeSlider.upperValue))
}
Create the file RangeSlider.swift and add this to it:
import UIKit
import QuartzCore
class RangeSlider: UIControl {
var minimumValue = 0.0
var maximumValue = 1.0
var lowerValue = 0.2
var upperValue = 0.8
let trackLayer = RangeSliderTrackLayer()//= CALayer() defined in RangeSliderTrackLayer.swift
let lowerThumbLayer = RangeSliderThumbLayer()//CALayer()
let upperThumbLayer = RangeSliderThumbLayer()//CALayer()
var previousLocation = CGPoint()
var trackTintColor = UIColor(white: 0.9, alpha: 1.0)
var trackHighlightTintColor = UIColor(red: 0.0, green: 0.45, blue: 0.94, alpha: 1.0)
var thumbTintColor = UIColor.white
var curvaceousness : CGFloat = 1.0
var thumbWidth: CGFloat {
return CGFloat(bounds.height)
}
override init(frame: CGRect) {
super.init(frame: frame)
trackLayer.rangeSlider = self
trackLayer.contentsScale = UIScreen.main.scale
layer.addSublayer(trackLayer)
lowerThumbLayer.rangeSlider = self
lowerThumbLayer.contentsScale = UIScreen.main.scale
layer.addSublayer(lowerThumbLayer)
upperThumbLayer.rangeSlider = self
upperThumbLayer.contentsScale = UIScreen.main.scale
layer.addSublayer(upperThumbLayer)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
func updateLayerFrames() {
trackLayer.frame = bounds.insetBy(dx: 0.0, dy: bounds.height / 3)
trackLayer.setNeedsDisplay()
let lowerThumbCenter = CGFloat(positionForValue(value: lowerValue))
lowerThumbLayer.frame = CGRect(x: lowerThumbCenter - thumbWidth / 2.0, y: 0.0,
width: thumbWidth, height: thumbWidth)
lowerThumbLayer.setNeedsDisplay()
let upperThumbCenter = CGFloat(positionForValue(value: upperValue))
upperThumbLayer.frame = CGRect(x: upperThumbCenter - thumbWidth / 2.0, y: 0.0,
width: thumbWidth, height: thumbWidth)
upperThumbLayer.setNeedsDisplay()
}
func positionForValue(value: Double) -> Double {
return Double(bounds.width - thumbWidth) * (value - minimumValue) /
(maximumValue - minimumValue) + Double(thumbWidth / 2.0)
}
override var frame: CGRect {
didSet {
updateLayerFrames()
}
}
override func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
previousLocation = touch.location(in: self)
// Hit test the thumb layers
if lowerThumbLayer.frame.contains(previousLocation) {
lowerThumbLayer.highlighted = true
} else if upperThumbLayer.frame.contains(previousLocation) {
upperThumbLayer.highlighted = true
}
return lowerThumbLayer.highlighted || upperThumbLayer.highlighted
}
func boundValue(value: Double, toLowerValue lowerValue: Double, upperValue: Double) -> Double {
return min(max(value, lowerValue), upperValue)
}
override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
let location = touch.location(in: self)
// 1. Determine by how much the user has dragged
let deltaLocation = Double(location.x - previousLocation.x)
let deltaValue = (maximumValue - minimumValue) * deltaLocation / Double(bounds.width - thumbWidth)
previousLocation = location
// 2. Update the values
if lowerThumbLayer.highlighted {
lowerValue += deltaValue
lowerValue = boundValue(value: lowerValue, toLowerValue: minimumValue, upperValue: upperValue)
} else if upperThumbLayer.highlighted {
upperValue += deltaValue
upperValue = boundValue(value: upperValue, toLowerValue: lowerValue, upperValue: maximumValue)
}
// 3. Update the UI
CATransaction.begin()
CATransaction.setDisableActions(true)
updateLayerFrames()
CATransaction.commit()
sendActions(for: .valueChanged)
return true
}
override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
lowerThumbLayer.highlighted = false
upperThumbLayer.highlighted = false
}
}
Next add the thumb layer subclass file RangeSliderThumbLayer.swift and add this to it:
import UIKit
class RangeSliderThumbLayer: CALayer {
var highlighted = false
weak var rangeSlider: RangeSlider?
override func draw(in ctx: CGContext) {
if let slider = rangeSlider {
let thumbFrame = bounds.insetBy(dx: 2.0, dy: 2.0)
let cornerRadius = thumbFrame.height * slider.curvaceousness / 2.0
let thumbPath = UIBezierPath(roundedRect: thumbFrame, cornerRadius: cornerRadius)
// Fill - with a subtle shadow
let shadowColor = UIColor.gray
ctx.setShadow(offset: CGSize(width: 0.0, height: 1.0), blur: 1.0, color: shadowColor.cgColor)
ctx.setFillColor(slider.thumbTintColor.cgColor)
ctx.addPath(thumbPath.cgPath)
ctx.fillPath()
// Outline
ctx.setStrokeColor(shadowColor.cgColor)
ctx.setLineWidth(0.5)
ctx.addPath(thumbPath.cgPath)
ctx.strokePath()
if highlighted {
ctx.setFillColor(UIColor(white: 0.0, alpha: 0.1).cgColor)
ctx.addPath(thumbPath.cgPath)
ctx.fillPath()
}
}
}
}
Finally add the track layer subclass file RangeSliderTrackLayer.swift and add the following to it:
import Foundation
import UIKit
import QuartzCore
class RangeSliderTrackLayer: CALayer {
weak var rangeSlider: RangeSlider?
override func draw(in ctx: CGContext) {
if let slider = rangeSlider {
// Clip
let cornerRadius = bounds.height * slider.curvaceousness / 2.0
let path = UIBezierPath(roundedRect: bounds, cornerRadius: cornerRadius)
ctx.addPath(path.cgPath)
// Fill the track
ctx.setFillColor(slider.trackTintColor.cgColor)
ctx.addPath(path.cgPath)
ctx.fillPath()
// Fill the highlighted range
ctx.setFillColor(slider.trackHighlightTintColor.cgColor)
let lowerValuePosition = CGFloat(slider.positionForValue(value: slider.lowerValue))
let upperValuePosition = CGFloat(slider.positionForValue(value: slider.upperValue))
let rect = CGRect(x: lowerValuePosition, y: 0.0, width: upperValuePosition - lowerValuePosition, height: bounds.height)
ctx.fill(rect)
}
}
}
Build Run and Get:
UPDATE:
It did not show to me, because it was all white. So the solution, without using any other framework and sticking with this one - you need to set all the views for all the components and then it will display well:
I have tried to import it in Swift as I used it before in Objective-C code, but without any luck. If I set everything properly and add it either in viewDidLoad() or viewDidAppear(), nothing gets displayed. One thing is worth mentioning, though - when I enter View Debug Hierarchy, the slider actually is there on the canvas:
But it's simply not rendered with all the colors that I did set before adding in it to the view. For the record - this is the code I used:
override func viewDidAppear(animated: Bool) {
var rangeSlider = NMRangeSlider(frame: CGRectMake(50, 50, 275, 34))
rangeSlider.lowerValue = 0.54
rangeSlider.upperValue = 0.94
let range = 10.0
let oneStep = 1.0 / range
let minRange: Float = 0.05
rangeSlider.minimumRange = minRange
let bgImage = UIView(frame: rangeSlider.frame)
bgImage.backgroundColor = .greenColor()
rangeSlider.trackImage = bgImage.pb_takeSnapshot()
let trackView = UIView(frame: CGRectMake(0, 0, rangeSlider.frame.size.width, 29))
trackView.backgroundColor = .whiteColor()
trackView.opaque = false
trackView.alpha = 0.3
rangeSlider.trackImage = UIImage(named: "")
let lowerThumb = UIView(frame: CGRectMake(0, 0, 8, 29))
lowerThumb.backgroundColor = .whiteColor()
let lowerThumbHigh = UIView(frame: CGRectMake(0, 0, 8, 29))
lowerThumbHigh.backgroundColor = UIColor.blueColor()
rangeSlider.lowerHandleImageNormal = lowerThumb.pb_takeSnapshot()
rangeSlider.lowerHandleImageHighlighted = lowerThumbHigh.pb_takeSnapshot()
rangeSlider.upperHandleImageNormal = lowerThumb.pb_takeSnapshot()
rangeSlider.upperHandleImageHighlighted = lowerThumbHigh.pb_takeSnapshot()
self.view.addSubview(rangeSlider)
self.view.backgroundColor = .lightGrayColor()
}
Using the method for capturing the UIView as UIImage mentioned in this question:
extension UIView {
func pb_takeSnapshot() -> UIImage {
UIGraphicsBeginImageContextWithOptions(bounds.size, false, UIScreen.mainScreen().scale)
drawViewHierarchyInRect(self.bounds, afterScreenUpdates: true)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
}
Other solution:
You can also try sgwilly/RangeSlider instead, it's written in Swift and therefore you won't even need a Bridging Header.
try this code :
override func viewDidLayoutSubviews() {
let margin: CGFloat = 20.0
let width = view.bounds.width - 2.0 * margin
rangeSlider.frame = CGRect(x: margin, y: margin + topLayoutGuide.length,
width: width, height: 31.0)
}
I implemented the range slider using :
https://github.com/Zengzhihui/RangeSlider
In the GZRangeSlider class, there is a method called :
private func setLabelText()
In that method, just put :
leftTextLayer.frame = CGRectMake(leftHandleLayer.frame.minX - 0.5 * (kTextWidth - leftHandleLayer.frame.width), leftHandleLayer.frame.minY - kTextHeight, kTextWidth, kTextHeight)
rightTextLayer.frame = CGRectMake(rightHandleLayer.frame.minX - 0.5 * (kTextWidth - leftHandleLayer.frame.width), leftTextLayer.frame.minY, kTextWidth, kTextHeight)
to animate the lower and upper labels..
This one is working well for me and its in swift.. just try it..