Change UISearchBar textColor not working

问题

I am using google places API for autoComplete widget. I am showing the full screen control in ios 9+ using swift. I am adding a full control as given in the docs.

I have added the code as shown in the docs. Now I want to change the searchBar text color to whiteColor.

So I tried this

UITextField.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).textColor = UIColor.whiteColor()

But I am not getting the desired behaviour. Below is the screenshot

This has been given in Docs

https://developers.google.com/places/ios-api/autocomplete#use_a_table_data_source

But this is not working. I need help with regarding to this.

回答1:

You need to create an extension like follwoing:

public extension UISearchBar {

    public func setNewcolor(color: UIColor) {
        let clrChange = subviews.flatMap { $0.subviews }
        guard let sc = (clrChange.filter { $0 is UITextField }).first as? UITextField else { return }
        sc.textColor = color
    }
}

And change color using following code:

 controller.searchBar.setNewcolor(UIColor.redColor())

Output is :

Update:

For the change color of searchBar text for the GMSAutocompleteViewController you need to do following code:

let searchBarTextAttributes: [String : AnyObject] = [NSForegroundColorAttributeName: UIColor.redColor(), NSFontAttributeName: UIFont.systemFontOfSize(UIFont.systemFontSize())]
UITextField.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).defaultTextAttributes = searchBarTextAttributes

That change the text out put like following image:

And if you wish to change placeholder text and it's color for searchBar. You need to do following code:

let placeholderAttributes: [String : AnyObject] = [NSForegroundColorAttributeName: UIColor.whiteColor(), NSFontAttributeName: UIFont.systemFontOfSize(UIFont.systemFontSize())]

let attributedPlaceholder: NSAttributedString = NSAttributedString(string: "Find a place", attributes: placeholderAttributes)
UITextField.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).attributedPlaceholder = attributedPlaceholder

It will be show like:

回答2:

Use Bellow code for Swift 3

if #available(iOS 9.0, *) {
  UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSForegroundColorAttributeName: UIColor.green]
  } else {
  // Fallback on earlier versions
}

Hope this helps.

回答3:

For swift 4 ios 12

UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes
            .updateValue(UIColor.white, forKey: NSAttributedStringKey.foregroundColor.rawValue)

回答4:

You can use UIAppearance protocol to get the appearance proxy for a class which is available in iOS 5.0 and later.

There are actually two ways to customize appearance for objects and to get the appearance proxy for the class.

To customize the appearance of all instances of a class, use appearance.
To customize the appearances for instances of a class when contained within an instance of a container class, or instances in a hierarchy, use appearanceWhenContainedIn.

You can apply this sample code:

[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setDefaultTextAttributes:@{NSForegroundColorAttributeName:[UIColor redColor]}];

You can also try another option given in this SO post - UISearchBar text color change in iOS 7.

I hope that covers your issue. Happy coding!

回答5:

In swift 5:

let searchBarTextAttributes: [NSAttributedString.Key : AnyObject] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue): UIColor.red, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue): UIFont.systemFont(ofSize: 14.0)]

UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = searchBarTextAttributes

来源：https://stackoverflow.com/questions/37763114/change-uisearchbar-textcolor-not-working

标签

google-maps

uisearchbar

google-places-api

uiappearance