How to set height and width of a UIAlertController in IOS 8

I have a UIAlertController with an TextFile. The problem is that the default UIAlertController is a very small size. It's text cannot be seen properly.

So, I want to increase the height and width of the UIAlertController. In other words, I want to create a custom UIAlertController. What would be the way to do that?

Solution

I do not think you can set the size. Bad workaround is, to set \n on the message. UIAlertView also has same limitation.

I will suggest to use UIPopoverController and implement your own dismiss button, since UIAlertController's purpose is more to display alert messages to the user (short message) per Apple Documentation. I do not think wall of message can be considered as alert message.

Generally, I think this limitation is set by Apple as a reminder this view is to display short message to users as part of their UX.

Edited with sample code First, sorry, I mean UIPopoverPresentViewController, not UIPopoverController

Here is the sample class:

@interface DemoPopOverPresentViewController : UIViewController

- (instancetype)initWithTitle:(NSString*)title message:(NSString*)message buttonTitle:(NSString*)buttonTitle;

@property NSString* titleText;
@property NSString* messageText;
@property NSString* buttonTitleText;

@property UILabel* titleLabel;
@property UILabel* textLabel;
@property UIButton* submitButton;

@end

@implementation DemoPopOverPresentViewController

- (instancetype)initWithTitle:(NSString*)title message:(NSString*)message buttonTitle:(NSString*)buttonTitle;
{
    self = [super init];

    if ( self ) {
        _titleText = title;
        _messageText = message;
        _buttonTitleText = buttonTitle;
    }

    return self;
}

- (void)viewDidLoad;
{
    [super viewDidLoad];

    _titleLabel = [UILabel new];
    [_titleLabel setTextAlignment:NSTextAlignmentCenter];
    [_titleLabel setFont:[UIFont preferredFontForTextStyle:UIFontTextStyleHeadline]];
    [_titleLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
    [_titleLabel setText:_titleText];
    [self.view addSubview:_titleLabel];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[_titleLabel]|"     options:0 metrics:nil views:NSDictionaryOfVariableBindings(_titleLabel)]];

    _textLabel = [UILabel new];
    [_textLabel setTextAlignment:NSTextAlignmentCenter];
    [_textLabel setFont:[UIFont preferredFontForTextStyle:UIFontTextStyleBody]];
    [_textLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
    [_textLabel setNumberOfLines:0];
    [_textLabel setText:_messageText];
    [self.view addSubview:_textLabel];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[_textLabel]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_textLabel)]];

    _submitButton = [UIButton buttonWithType:UIButtonTypeSystem];
    [_submitButton setTitle:_buttonTitleText forState:UIControlStateNormal];
    [_submitButton addTarget:self action:@selector(submitButtonTouched:) forControlEvents:UIControlEventTouchUpInside];
    [_submitButton setTranslatesAutoresizingMaskIntoConstraints:NO];
    [self.view addSubview:_submitButton];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[_submitButton]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_submitButton)]];

    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[_titleLabel(<=44.0)]-16-[_textLabel]-16-[_submitButton(<=44.0)]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_titleLabel,_textLabel,_submitButton)]];
}

- (void)submitButtonTouched:(id)sender;
{
    [self dismissViewControllerAnimated:YES completion:^{

    }];
}

@end

Then on presentingViewController,

first, it will need to implement UIPopoverPresentationControllerDelegate delegate

then to initialise the class:

DemoPopOverPresentViewController* controller = [[DemoPopOverPresentViewController alloc] initWithTitle:@"Info" message:@"The quick brown fox jumps over the lazy dog" buttonTitle:@"Dismiss"];
controller.modalPresentationStyle = UIModalPresentationPopover;
// set the content size of your 'alert view'
controller.preferredContentSize = CGSizeMake(200.0, 150.0);
UIPopoverPresentationController* pc = [controller popoverPresentationController];
pc.sourceView = self.view;
pc.delegate = self;
pc.sourceRect = CGRectMake(self.view.frame.size.width/2.0, self.view.frame.size.height/2.0, 0.0, 0.0);
pc.permittedArrowDirections = NULL;
[self presentViewController:controller animated:YES completion:^{

}];

implement delegate method for UIPopoverPresentationControllerDelegate: - (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller and return UIModalPresentationNone