Use a simple Faraday cage to block or limit the external RF signal level. You can make your own with aluminum foil. The openings should be smaller than the wavelength of your data service if that’s what you want to block. 800 MHz has a 37 cm (14″) wavelength 1900 MHz has a 16 cm … Read more
Detecting iOS With iOS 13 iPad both User agent and platform strings are changed and differentiating between iPad and MacOS seems possible, so all answers below needs to take that into account now. This might be the shortest alternative that also covers iOS 13: function iOS() { return [ ‘iPad Simulator’, ‘iPhone Simulator’, ‘iPod Simulator’, … Read more
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
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 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
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
Do you plan to have a squared UIView of width: 100 and Height: 100 centered inside the UIView of an UIViewController? If so, you may try one of the 6 following Auto Layout styles (Swift 5 / iOS 12.2): 1. Using NSLayoutConstraint initializer override func viewDidLoad() { let newView = UIView() newView.backgroundColor = UIColor.red view.addSubview(newView) … Read more
To provide a differing response, I’m running OS X and Xcode on a virtualised (VMware) machine on Linux. CPU is a Core2Quad (Q8800), and it is perfectly fast. I found a prebuilt VM online (I’ll leave it to you to find) Xcode/iPhone development works perfectly, as does debugging via USB to the phone itself. It … Read more
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
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];