IOS UISearchBar Background Color In iOS 9 - ios

I have been search a while for this issue , I want my search bar display like BBC News App
I try all related method
for view in searchBar.subviews {
if view.isKindOfClass(NSClassFromString("UISearchBarBackground")!) {
view.removeFromSuperview()
break;
}
}
self.searchBar.tintColor = UIColor.clearColor()
self.searchBar.backgroundColor = UIColor.clearColor()
self.searchBar.translucent = true
here is my output
Am I miss something ??? Please Help me , thx !

Swift 3
To remove the background altogether, set backgroundImage to an empty image:
searchBar.backgroundImage = UIImage()
To set a custom background color, use barTintcolor property:
searchBar.barTintColor = .green

Thx all , I solve the question by setting the background image to 'nil' , which is a nonexistent image in my app
my final output
==================== Update Final Solution ====================
After read more documents . Finally I found a better solution ,
for subView in searchBar.subviews {
for view in subView.subviews {
if view.isKindOfClass(NSClassFromString("UINavigationButton")!) {
let cancelButton = view as! UIButton
cancelButton.setTitle("取消", forState: UIControlState.Normal)
cancelButton.setTitleColor(UIColor.whiteColor(), forState: .Normal)
}
if view.isKindOfClass(NSClassFromString("UISearchBarBackground")!) {
let imageView = view as! UIImageView
imageView.removeFromSuperview()
}
}
}
==================== Update Swift4 ====================
for subView in searchBar.subviews {
for view in subView.subviews {
if view.isKind(of: NSClassFromString("UINavigationButton")!) {
let cancelButton = view as! UIButton
cancelButton.setTitleColor(.white, for: .normal)
cancelButton.setTitle("取消", for: .normal)
}
if view.isKind(of: NSClassFromString("UISearchBarBackground")!) {
let imageView = view as! UIImageView
imageView.removeFromSuperview()
}
}
}

Alternate version as an extension
extension UISearchBar {
func removeBackgroundImageView(){
if let view:UIView = self.subviews.first {
for curr in view.subviews {
guard let searchBarBackgroundClass = NSClassFromString("UISearchBarBackground") else {
return
}
if curr.isKind(of:searchBarBackgroundClass){
if let imageView = curr as? UIImageView{
imageView.removeFromSuperview()
break
}
}
}
}
}
}

In my case it helped:
searchView.backgroundImage = UIImage()
searchView.searchTextField.backgroundColor = .white

The current answers will cause runtime errors if run within iOS 13:
Terminating app due to uncaught exception 'NSGenericException', reason:
'Missing or detached view for search bar layout. The application must not remove
<UISearchBarBackground: 0x102d05050; frame = (0 0; 414 56); alpha = 0; hidden = YES;
userInteractionEnabled = NO; layer = <CALayer: 0x280287420>> from the hierarchy.'
If the code must be run by devices between iOS 9 and iOS 13, then the below is a possible solution.
First, create an extension that allows for the recursive finding of a subview based on a class name:
extension UIView {
/// Find the first subview of the specified class.
/// - Parameter className: The class name to search for.
/// - Parameter usingRecursion: True if the search should continue through the subview tree until a match is found; false otherwise
/// - Returns: The first child UIView of the specified class
func findSubview(withClassName className: String, usingRecursion: Bool) -> UIView? {
// If we can convert the class name until a class, we look for a match in the subviews of our current view
if let reflectedClass = NSClassFromString(className) {
for subview in self.subviews {
if subview.isKind(of: reflectedClass) {
return subview
}
}
}
// If recursion was specified, we'll continue into all subviews until a view is found
if usingRecursion {
for subview in self.subviews {
if let tempView = subview.findSubview(withClassName: className, usingRecursion: usingRecursion) {
return tempView
}
}
}
// If we haven't returned yet, there was no match
return nil
}
}
Then, instead of removing the subview, make it fully transparent. The backgroundColorView view is the color that shows up directly underneath the text, but adjusting it is not a necessary part of the solution.
// On iOS 9, there is still an image behind the search bar. We want to remove it.
if let backgroundView = searchBar.findSubview(withClassName: "UISearchBarBackground", usingRecursion: true) {
backgroundView.alpha = 0
}
// The color on iOS 9 is white. This mimics the newer appearance of the post-iOS 9
// search controllers
if let backgroundColorView = searchBar.findSubview(withClassName: "_UISearchBarSearchFieldBackgroundView", usingRecursion: true) as? UIImageView {
backgroundColorView.backgroundColor = UIColor.lightGray
backgroundColorView.layer.cornerRadius = 8
backgroundColorView.alpha = 0.3
backgroundColorView.image = nil
}

Related

UIView default properties and custom properties

I created UIView with default properties
var color = Label.Color.black { didSet{ setNeedsDisplay() }}
var count = Label.Count.one.rawValue { didSet{ setNeedsDisplay() }}
var shading = Label.Shading.empty { didSet{ setNeedsDisplay() }}
var shape = Label.Shape.triangle { didSet{ setNeedsDisplay() }}
var isSelected = false
And then I add some subviews using the same UIView in ViewController
func addCardsOnGridView() {
grid.frame = cardsView.bounds
grid.cellCount = game.cardsOnDeck.count
for cardView in cardsView.subviews{
cardView.removeFromSuperview()
}
for index in 0..<grid.cellCount {
if let cellFrame = grid[index] {
let card = game.cardsOnDeck[index]
let cardView = CardsView(frame: cellFrame.insetBy(dx: CardSize.inset, dy: CardSize.inset))
cardView.color = card.label.color
cardView.count = card.label.count.rawValue
cardView.shape = card.label.shape
cardView.shading = card.label.shading
//cardView.isSelected = card.isSelected
//print(cardsView.isSelected)
cardsView.addSubview(cardView)
} else {
print("grid[\(index)] doecnt exist")
}
}
}
and then I got this UIView with default comes as superview and subviews above superview:
How can I remove view with default UIView properties and redraw with custom properties?
I can't understand your question completely. What I understand is that you want to get specific view like triangle view.
One way to achieve this is by assigning tag to every subview like below when you are adding them in mainView
aView.tag = 6
and then when you want to get a subview, you can get using viewWithTag function like below
if let aCustomView = mainView.viewWithTag(6) as? CustomView {
aCustomView.myColor = .blue
}
An other way to get custom view is by looping thought subview and try to cast view into custom class like below
mainView.subviews.forEach({ (aView) in
if aView.tag == 6,
let customView = aView as? CustomView {
customView.myColor = .blue
}
})

customize swipe delete button in swift4

I have customize Swipe delete button till swift3 [ios 9].
I have tried this code for ios 9 in swift3
func setSwipeDeletebutton(cell : UITableViewCell, BackView : UIView) {
//Customize Delete button
for subview in cell.subviews {
subview.backgroundColor = UIColor.clear
for sub in subview.subviews {
if String(describing: sub).range(of: "UITableViewCellActionButton") != nil {
sub.backgroundColor = UIColor.white
var newframe = sub.frame
newframe.size.height = BackView.frame.size.height
sub.frame = newframe
sub.SetUpView()
for view in sub.subviews {
if String(describing: view).range(of: "UIButtonLabel") != nil {
if let label = view as? UILabel {
label.textColor = SharedInstance.hexStringToUIColor(hex: Color.TodayActivityColor.Type_LEAVE)
}
}
}
}
}
}
}
Now, as a change in ios 11, I can not customize swipe delete button using this code.
I have tried to set image as swipe delete button, but it's not set properly because I also want shadow to that delete button.
Can anyone suggest that how can I customize the swipe delete button using swift4?
You are accessing subviews by using:
String(describing: sub).range(of: "UITableViewCellActionButton")
And
String(describing: view).range(of: "UIButtonLabel")
This is not advisable by apple.
However, to debug this issue open your view hierarchy while the table view row action / drawer is open.
You should see the view you wish to alter, in the hierarchy.
Then change your Strings as required:
String(describing: sub).range(of: "UISwipeActionPullView")
UISwipeActionPullView may not be what you need but the concept is the same.

Can't change UINavigationBar prompt color

I am unable to change the prompt color on my navigation bar. I've tried the code below in viewDidLoad, but nothing happens.
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
Am I missing something? Is the code above wrong?
I was able to make the prompt color white on iOS 11 was setting the barStyle to black. I set the other color attributes (like the desired background color) using the appearance proxy:
myNavbar.barStyle = UIBarStyleBlack; // Objective-C
myNavbar.barStyle = .black // Swift
It seems like you're right about this one. You need to use UIAppearance to style the prompt text on iOS 11.
I've filed radar #34758558 that the titleTextAttributes property just stopped working for prompt in iOS 11.
The good news is that there are a couple of workarounds, which we can uncover by using Xcode's view hierarchy debugger:
// 1. This works, but potentially changes *all* labels in the navigation bar.
// If you want this, it works.
UILabel.appearance(whenContainedInInstancesOf: [UINavigationBar.self]).textColor = UIColor.white
The prompt is just a UILabel. If we use UIAppearance's whenContainedInInstancesOf:, we can pretty easily update the color the way we want.
If you look closely, you'll notice that there's also a wrapper view on the UILabel. It has its own class that might respond to UIAppearance...
// 2. This is a more precise workaround but it requires using a private class.
if let promptClass = NSClassFromString("_UINavigationBarModernPromptView") as? UIAppearanceContainer.Type
{
UILabel.appearance(whenContainedInInstancesOf: [promptClass]).textColor = UIColor.white
}
I'd advise sticking to the more general solution, since it doesn't use private API. (App review, etc.) Check out what you get with either of these two solutions:
You may use
for view in self.navigationController?.navigationBar.subviews ?? [] {
let subviews = view.subviews
if subviews.count > 0, let label = subviews[0] as? UILabel {
label.textColor = UIColor.white
label.backgroundColor = UIColor.red
}
}
It will be a temporary workaround until they'll fix it
More complicated version to support old and new iOS
func updatePromptUI(for state: State) {
if (state != .Online) {
//workaround for SOFT-7019 (iOS 11 bug - Offline message has transparent background)
if #available(iOS 11.0, *) {
showPromptView()
} else {
showOldPromptView()
}
}
else {
self.navigationItem.prompt = nil
if #available(iOS 11.0, *) {
self.removePromptView()
} else {
self.navigationController?.navigationBar.titleTextAttributes = nil
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor:UIColor.lightGray]
}
}
}
private func showOldPromptView() {
self.navigationItem.prompt = "Network Offline. Some actions may be unavailable."
let navbarFont = UIFont.systemFont(ofSize: 16)
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.font: navbarFont, NSAttributedStringKey.foregroundColor:UIColor.white]
}
private func showPromptView() {
self.navigationItem.prompt = String()
self.removePromptView()
let promptView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 18))
promptView.backgroundColor = .red
let promptLabel = UILabel(frame: CGRect(x: 0, y: 2, width: promptView.frame.width, height: 14))
promptLabel.text = "Network Offline. Some actions may be unavailable."
promptLabel.textColor = .white
promptLabel.textAlignment = .center
promptLabel.font = promptLabel.font.withSize(13)
promptView.addSubview(promptLabel)
self.navigationController?.navigationBar.addSubview(promptView)
}
private func removePromptView() {
for view in self.navigationController?.navigationBar.subviews ?? [] {
view.removeFromSuperview()
}
}
I suggest using a custom UINavigationBar subclass and overriding layoutSubviews:
- (void)layoutSubviews {
[super layoutSubviews];
if (self.topItem.prompt) {
UILabel *promptLabel = [[self recursiveSubviewsOfKind:UILabel.class] selectFirstObjectUsingBlock:^BOOL(UILabel *label) {
return [label.text isEqualToString:self.topItem.prompt];
}];
promptLabel.textColor = self.tintColor;
}
}
Basically I'm enumerating all UILabels in the subview hierarchy and check if their text matches the prompt text. Then we set the textColor to the tintColor (feel free to use a custom color). That way, we don't have to hardcode the private _UINavigationBarModernPromptView class as the prompt label's superview. So the code is be a bit more future-proof.
Converting the code to Swift and implementing the helper methods recursiveSubviewsOfKind: and selectFirstObjectUsingBlock: are left as an exercise to the reader 😉.
You can try this:
import UIKit
class ViewController: UITableViewController {
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
updatePrompt()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
updatePrompt()
}
func updatePrompt() {
navigationItem.prompt = " "
for view in navigationController?.navigationBar.subviews ?? [] where NSStringFromClass(view.classForCoder) == "_UINavigationBarModernPromptView" {
if let prompt = view.subviews.first as? UILabel {
prompt.text = "Hello Red Prompt"
prompt.textColor = .red
}
}
navigationItem.title = "This is the title (Another color)"
}
}
Moshe's first answer didn't work for me because it changed the labels inside of system VCs like mail and text compose VCs. I could change the background of those nav bars but that opens up a whole other can of worms. I didn't want to go the private class route so I only changed UILabels contained inside of my custom navigation bar subclass.
UILabel.appearance(whenContainedInInstancesOf: [NavigationBar.self]).textColor = UIColor.white
Try this out:->
navController.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor.rawValue: UIColor.red]
I've found next work around for iOS 11.
You need set at viewDidLoad
navigationItem.prompt = UINavigationController.fakeUniqueText
and after that put next thing
navigationController?.promptLabel(completion: { label in
label?.textColor = .white
label?.font = Font.regularFont(size: .p12)
})
extension UINavigationController {
public static let fakeUniqueText = "\n\n\n\n\n"
func promptLabel(completion: #escaping (UILabel?) -> Void) {
gloabalThread(after: 0.5) { [weak self] in
guard let `self` = self else {
return
}
let label = self.findPromptLabel(at: self.navigationBar)
mainThread {
completion(label)
}
}
}
func findPromptLabel(at view: UIView) -> UILabel? {
if let label = view as? UILabel {
if label.text == UINavigationController.fakeUniqueText {
return label
}
}
var label: UILabel?
view.subviews.forEach { subview in
if let promptLabel = findPromptLabel(at: subview) {
label = promptLabel
}
}
return label
}
}
public func mainThread(_ completion: #escaping SimpleCompletion) {
DispatchQueue.main.async(execute: completion)
}
public func gloabalThread(after: Double, completion: #escaping SimpleCompletion) {
DispatchQueue.global().asyncAfter(deadline: .now() + after) {
completion()
}
}

UIAlertController Action Sheet without Blurry View Effect

I'm using UIAlertController for some actions.
But I'm not a big fan of the Blurry View Effect in the actions group view (see screenshot below).
I'm trying to remove this blurry effect. I made some research online, and I couldn't find any API in UIAlertController that allows to remove this blurry effect. Also, according to their apple doc here :
The UIAlertController class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified.
I see that Instagram also removes this blurry view effect :
The only way I could find to remove it is to update the view hierarchy myself via an extension of UIAlertController.
extension UIAlertController {
#discardableResult private func findAndRemoveBlurEffect(currentView: UIView) -> Bool {
for childView in currentView.subviews {
if childView is UIVisualEffectView {
childView.removeFromSuperview()
return true
} else if String(describing: type(of: childView.self)) == "_UIInterfaceActionGroupHeaderScrollView" {
// One background view is broken, we need to make sure it's white.
if let brokenBackgroundView = childView.superview {
// Set broken brackground view to a darker white
brokenBackgroundView.backgroundColor = UIColor.colorRGB(red: 235, green: 235, blue: 235, alpha: 1)
}
}
findAndRemoveBlurEffect(currentView: childView)
}
return false
}
}
let actionSheetController = UIAlertController(title: title, message: nil, preferredStyle: .actionSheet)
actionSheetController.view.tintColor = .lightBlue
actionSheetController.removeBlurryView()
This worked fine, it removed my blurry view effect:
What I'm wondering... Is my solution the only way to accomplish that? Or there is something that I'm missing about the Alert Controller appearance?
Maybe there is a cleaner way to accomplish exactly that result? Any other ideas?
It is easier to subclass UIAlertController.
The idea is to traverse through view hierarchy each time viewDidLayoutSubviews gets called, remove effect for UIVisualEffectView's and update their backgroundColor:
class AlertController: UIAlertController {
/// Buttons background color.
var buttonBackgroundColor: UIColor = .darkGray {
didSet {
// Invalidate current colors on change.
view.setNeedsLayout()
}
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
// Traverse view hierarchy.
view.allViews.forEach {
// If there was any non-clear background color, update to custom background.
if let color = $0.backgroundColor, color != .clear {
$0.backgroundColor = buttonBackgroundColor
}
// If view is UIVisualEffectView, remove it's effect and customise color.
if let visualEffectView = $0 as? UIVisualEffectView {
visualEffectView.effect = nil
visualEffectView.backgroundColor = buttonBackgroundColor
}
}
// Update background color of popoverPresentationController (for iPads).
popoverPresentationController?.backgroundColor = buttonBackgroundColor
}
}
extension UIView {
/// All child subviews in view hierarchy plus self.
fileprivate var allViews: [UIView] {
var views = [self]
subviews.forEach {
views.append(contentsOf: $0.allViews)
}
return views
}
}
Usage:
Create alert controller.
Set buttons background color:
alertController.buttonBackgroundColor = .darkGray
Customise and present controller.
Result:
Answer by Vadim works really well.
What I missed in it (testing on iOS 14.5) is lack of separators and invisible title and message values.
So I added setting correct textColor for labels and skipping separator visual effect views in order to get correct appearance. Also remember to override traitCollectionDidChange method if your app supports dark mode to update controls backgroundColor accordingly
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
for subview in view.allViews {
if let label = subview as? UILabel, label.textColor == .white {
label.textColor = .secondaryLabel
}
if let color = subview.backgroundColor, color != .clear {
subview.backgroundColor = buttonBackgroundColor
}
if let visualEffectView = subview as? UIVisualEffectView,
String(describing: subview).contains("Separator") == false {
visualEffectView.effect = nil
visualEffectView.contentView.backgroundColor = buttonBackgroundColor
}
}
popoverPresentationController?.backgroundColor = buttonBackgroundColor
}

how to copy one view to another view in Swift

I want to copy one UIView to another view without making it archive or unarchive.
Please help me if you have any solution.
I tried with by making an extension of UIView as already available an answer on Stack over flow. But its crashing when I pass the view with pattern Image Background color.
The code related to my comment below:
extension UIView
{
func copyView() -> UIView?
{
return NSKeyedUnarchiver.unarchiveObjectWithData(NSKeyedArchiver.archivedDataWithRootObject(self)) as? UIView
}
}
I've just tried this simple code in a Playground to check that the copy view works and it's not pointing the same view:
let originalView = UIView(frame: CGRectMake(0, 0, 100, 50));
originalView.backgroundColor = UIColor.redColor();
let originalLabel = UILabel(frame: originalView.frame);
originalLabel.text = "Hi";
originalLabel.backgroundColor = UIColor.whiteColor();
originalView.addSubview(originalLabel);
let copyView = originalView.copyView();
let copyLabel = copyView?.subviews[0] as! UILabel;
originalView.backgroundColor = UIColor.blackColor();
originalLabel.text = "Hola";
originalView.backgroundColor; // Returns black
originalLabel.text; // Returns "Hola"
copyView!.backgroundColor; // Returns red
copyLabel.text; // Returns "Hi"
If the extension wouldn't work, both copyView and originalView would have same backgroundColor and the same would happen to the text of the labels. So maybe there is the possibility that the problem is in other part.
Original Post
func copyView(viewforCopy: UIView) -> UIView {
viewforCopy.hidden = false //The copy not works if is hidden, just prevention
let viewCopy = viewforCopy.snapshotViewAfterScreenUpdates(true)
viewforCopy.hidden = true
return viewCopy
}
Updated for Swift 4
func copyView(viewforCopy: UIView) -> UIView {
viewforCopy.isHidden = false //The copy not works if is hidden, just prevention
let viewCopy = viewforCopy.snapshotView(afterScreenUpdates: true)
viewforCopy.isHidden = true
return viewCopy!
}

Resources