Disabling Dynamic Type in Swift - ios

Question

I have a Sprite Kit based game that uses a UIView within one of the scenes, and I do that so that I can take advantage of the UITableViewController to present a game settings screen.
The difficulty I am running into is that when a user sets their iPad system accessibility settings to use (extra) large type, the text within the UITableView is too large for the cells and it looks just plain silly.
What I would like to do is straight up disable the dynamic type within the app so it always displays the same sized type in the cells.
I have found another similar posting (here) but the response offers an Objective-C response:
#import <objc/runtime.h>
#implementation AppDelegate
NSString* swizzled_preferredContentSizeCategory(id self, SEL _cmd) {
return UIContentSizeCategoryLarge; // Set category you prefer, Large being iOS' default.
}
- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
Method method = class_getInstanceMethod([UIApplication class], #selector(preferredContentSizeCategory));
method_setImplementation(method, (IMP)swizzled_preferredContentSizeCategory);
...
}
I need to do this in Swift.
What is the correct way to do this same thing in Swift in Xcode 7+ ?

Answer 1

Thanks #zeeple for the solution.
Here is the answer to the original question:
"preferredContentSizeCategory" in Objective-C is a method, but in Swift it is a read-only variable.
So in your AppDelegate is like this:
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
// MARK: - UIApplicationDelegate
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
UIApplication.classInit
self.window = UIWindow(frame: UIScreen.main.bounds)
...
self.window?.makeKeyAndVisible()
return true
}
}
// MARK: - Fix Dynamic Type
extension UIApplication {
static let classInit: Void = {
method_exchangeImplementations(
class_getInstanceMethod(UIApplication.self, #selector(getter: fixedPreferredContentSizeCategory))!,
class_getInstanceMethod(UIApplication.self, #selector(getter: preferredContentSizeCategory))!
)
}()
#objc
var fixedPreferredContentSizeCategory: UIContentSizeCategory {
return .large
}
}

Answer 2

Okay, first let me say this: while I am happy that I was able to quickly find a way to accommodate the dynamic text provided by the iOS accessibility settings (which I will show the code for in a sec) I think it is still important to get an answer to the original question.
That said, here is what I did to the table view code to respect the larger type that some users need. It was a two step process. First, add:
tableView.estimatedRowHeight = 44.0
tableView.rowHeight = UITableViewAutomaticDimension
to the viewDidLoad method. Then, in the cellForRowAtIndexPath method, add the following before you return the cell:
cell.textLabel!.numberOfLines = 0
Good luck folks, and please add an answer to the original question if you have one :)

Answer 3

What I would like to do is straight up disable the dynamic type within the app so it always displays the same sized type in the cells.
Dynamic Type only works for text with implemented text styles.
So, if you always want to disable Dynamic Type and display the same sized type in the cells, don't use text styles nor image size adjustment in them.
However, if you do want to use the text styles, never tick Automatically Adjusts Font for each text element in Interface Builder (equivalent to adjustsFontForContentSizeCategoryin code).

Answer 4

Hi All Frustrated Devs,
Here is perfect solution to disable Dynamic Type is :
Since iOS 15 you can set limits on the minimum and maximum sizes of dynamic type. It works for both UIKit and SwiftUI.
// UIKit
view.minimumContentSizeCategory = .medium
view.maximumContentSizeCategory = .accessibilityExtraLarge
// SwiftUI
ContentView()
.dynamicTypeSize(.medium ... .accessibility3)
Also if you want to directly disable throughout the whole Application, You should create a Base Class which should be parent of your all VCs. In BaseVC you can set up code.