cocoa-touch – Page 95

Set the maximum character length of a UITextField

September 14, 2022 by Tarik

While the UITextField class has no max length property, it’s relatively simple to get this functionality by setting the text field’s delegate and implementing the following delegate method: Objective-C – (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { // Prevent crashing undo bug – see note below. if(range.length + range.location > textField.text.length) { return NO; } NSUInteger … Read more

iOS – Dismiss keyboard when touching outside of UITextField

September 14, 2022 by Tarik

You’ll need to add an UITapGestureRecogniser and assign it to the view, and then call resign first responder on the UITextField on it’s selector. The code: In viewDidLoad UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)]; [self.view addGestureRecognizer:tap]; In dismissKeyboard: -(void)dismissKeyboard { [aTextField resignFirstResponder]; } (Where aTextField is the textfield that is responsible for the keyboard) … Read more

How can I set the title of a UIButton as left-aligned?

September 13, 2022 by Tarik

Set the contentHorizontalAlignment: // Swift emailBtn.contentHorizontalAlignment = .left; // Objective-C emailBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft; You might also want to adjust the content left inset otherwise the text will touch the left border: // Swift 3 and up: emailBtn.contentEdgeInsets = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0); // Objective-C emailBtn.contentEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);

How to set cornerRadius for only top-left and top-right corner of a UIView?

September 13, 2022 by Tarik

I am not sure why your solution did not work but the following code is working for me. Create a bezier mask and apply it to your view. In my code below I was rounding the bottom corners of the _backgroundView with a radius of 3 pixels. self is a custom UITableViewCell: UIBezierPath *maskPath = … Read more

How to programmatically send SMS on the iPhone?

September 13, 2022 by Tarik

Restrictions If you could send an SMS within a program on the iPhone, you’ll be able to write games that spam people in the background. I’m sure you really want to have spams from your friends, “Try out this new game! It roxxers my boxxers, and yours will be too! roxxersboxxers.com!!!! If you sign up … Read more

How would I create a UIAlertView in Swift?

September 13, 2022 by Tarik

From the UIAlertView class: // UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead On iOS 8, you can do this: let alert = UIAlertController(title: “Alert”, message: “Message”, preferredStyle: UIAlertControllerStyle.Alert) alert.addAction(UIAlertAction(title: “Click”, style: UIAlertActionStyle.Default, handler: nil)) self.presentViewController(alert, animated: true, completion: nil) Now UIAlertController is a single class for creating and interacting with what … Read more

How to get the screen width and height in iOS?

September 13, 2022 by Tarik

How can one get the dimensions of the screen in iOS? The problem with the code that you posted is that you’re counting on the view size to match that of the screen, and as you’ve seen that’s not always the case. If you need the screen size, you should look at the object that … Read more

How to lose margin/padding in UITextView

September 13, 2022 by Tarik

For iOS 7.0, I’ve found that the contentInset trick no longer works. This is the code I used to get rid of the margin/padding in iOS 7. This brings the left edge of the text to the left edge of the container: textView.textContainer.lineFragmentPadding = 0 This causes the top of the text to align with … Read more

How do I size a UITextView to its content?

September 12, 2022 by Tarik

This works for both iOS 6.1 and iOS 7: – (void)textViewDidChange:(UITextView *)textView { CGFloat fixedWidth = textView.frame.size.width; CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)]; CGRect newFrame = textView.frame; newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height); textView.frame = newFrame; } Or in Swift (Works with Swift 4.1 in iOS 11) let fixedWidth = textView.frame.size.width let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, … Read more

How do I create a basic UIButton programmatically?

September 12, 2022 by Tarik

Here’s one: UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button addTarget:self action:@selector(aMethod:) forControlEvents:UIControlEventTouchUpInside]; [button setTitle:@”Show View” forState:UIControlStateNormal]; button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0); [view addSubview:button];