Maximum height of iOS 8 Today Extension?

Question

I am working on a Today Extension with a dynamically sized table. I have been able to get the table to resize for the content using:

    self.preferredConten         


        

Answer 1

I made some tests and you can calculate the maximum height of your Today Extension with this formular:

for iPhone:

float maxHeight = [[ UIScreen mainScreen ] bounds ].size.height - 126;

for iPad:

float maxHeight = [[ UIScreen mainScreen ] bounds ].size.height - 171;

This should work for alle Screen sizes...

Answer 2

To get the max height of the widgets active display mode, do this in your UIViewController:

let context = self.extensionContext
if let context = context{
    let height = context.widgetMaximumSize(for: context.widgetActiveDisplayMode).height
}

To get the max height of expanded and compact individually regardless of the current display mode, do this:

var context = self.extensionContext
if let context = context{
    let compactHeight = context.widgetMaximumSize(for: .compact).height
    let expandedHeight = context.widgetMaximumSize(for: .expanded).height
}

Answer 3

Ok, although you can assign to the preferredContentSize any CGSize it is reduced to max height and width.

Device Orientation (max width, max height):

iPhone 5S Portrait (272, 441.5)
iPhone 5S Landscape (520, 205.5)

iPhone 6 Portrait (327, 540.5)
iPhone 6 Landscape (586, 260.5)

iPhone 6 Plus Portrait (362, 610)
iPhone 6 Plus Landscape (585, 288)

iPad Mini Portrait (535, 853)
iPad Mini Landscape (535, 597)

iPad Portrait (711, 985)
iPad Landscape (967, 729)

How did I get these values?

@IBOutlet weak var sizerView: UIView!

inside viewDidLoad:

preferredContentSize = CGSizeMake(0, 2000)
dispatch_after(1, dispatch_get_main_queue(), { //it needs time to render itself
    label.text = NSStringFromCGSize(self.sizerView.bounds.size) //here you have MAX VALUES
}

Answer 4

It seems, that iOS is adding an UIView-Encapsulated-Layout-Height constraint to your own constraints:

(
    "<NSLayoutConstraint:0x610000280640 V:[_UILayoutGuide:0x7f92d0513810]-(500)-[UILabel:0x7f92d040cb20'Hello World']>",
    "<NSLayoutConstraint:0x610000280690 V:[UILabel:0x7f92d040cb20'Hello World']-(500)-[_UILayoutGuide:0x7f92d0515100]>",
    "<_UILayoutSupportConstraint:0x6100002a2f40 V:[_UILayoutGuide:0x7f92d0513810(0)]>",
    "<_UILayoutSupportConstraint:0x6100002a2ee0 V:|-(0)-[_UILayoutGuide:0x7f92d0513810]   (Names: '|':UIView:0x7f92d040c810 )>",
    "<_UILayoutSupportConstraint:0x6100002a3000 V:[_UILayoutGuide:0x7f92d0515100(0)]>",
    "<_UILayoutSupportConstraint:0x6100002a2fa0 _UILayoutGuide:0x7f92d0515100.bottom == UIView:0x7f92d040c810.bottom>",
    "<NSLayoutConstraint:0x60800009e780 'UIView-Encapsulated-Layout-Height' V:[UIView:0x7f92d040c810(628)]>"
)

This constraint forces the widget to have the maximum height. You can get it's value like this:

- (void)widgetPerformUpdateWithCompletionHandler:(void (^)(NCUpdateResult))completionHandler {

    for (NSLayoutConstraint *constraint in self.view.constraints) {
        if ([constraint.identifier isEqualToString:@"UIView-Encapsulated-Layout-Height"]) {
            NSLog(@"Height: %@", @(constraint.constant));
        }
    }

    completionHandler(NCUpdateResultNewData);
}

Answer 5

The recommended way is to use auto-layout constraints to constrain your view's height.

It seems the 568px is just the maxheight of your iPhone 5 and not the actual size. As far as I could figure out there is no way to get the real size.