WARNING, OUTDATED ANSWER: this answer is not up to date as per WWDC 2015, for the correct answer refer to the accepted answer (Daniel Hall) above. This answer will stay for record. Summarized from the developer library: From a practical perspective, in iOS and OS X outlets should be defined as declared properties. Outlets should … Read more
If the data is not null-terminated, you should use -initWithData:encoding: NSString* newStr = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding]; If the data is null-terminated, you should instead use -stringWithUTF8String: to avoid the extra \0 at the end. NSString* newStr = [NSString stringWithUTF8String:[theData bytes]]; (Note that if the input is not properly UTF-8-encoded, you will get nil.) Swift … Read more
I’ve found the simplest way to do this is with a macro. Just include it in your header and it’s available throughout your project. #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0] uicolor macro with hex values Also formatted version of this code: #define UIColorFromRGB(rgbValue) \ … Read more
During startup in (-viewDidLoad or in storyboard) do: self.tableView.allowsMultipleSelectionDuringEditing = false Override to support conditional editing of the table view. This only needs to be implemented if you are going to be returning NO for some items. By default, all items are editable. – (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return YES if you want … Read more
I have solved it with adding some key in info.plist. The steps I followed are: Opened my Project target’s info.plist file Added a Key called NSAppTransportSecurity as a Dictionary. Added a Subkey called NSAllowsArbitraryLoads as Boolean and set its value to YES as like following image. Clean the Project and Now Everything is Running fine … Read more
Since the introduction of attributed strings in UIViews in iOS 6, it’s possible to assign a color to the placeholder text like this: if ([textField respondsToSelector:@selector(setAttributedPlaceholder:)]) { UIColor *color = [UIColor blackColor]; textField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:placeholderText attributes:@{NSForegroundColorAttributeName: color}]; } else { NSLog(@”Cannot set placeholder text’s color, because deployment target is earlier than iOS 6.0″); … Read more
Updated Nowadays, Apple realized the problem we solved many years ago (lol_face) and provides Content Layout Guide and Frame Layout Guide as part of the UIScrollView. Therefore you need to go through the following steps: Same as original response below; For this contentView, set top, bottom, left, and right margins to 0 pinning them to … Read more
In a Nutshell An unwind segue (sometimes called exit segue) can be used to navigate back through push, modal or popover segues (as if you popped the navigation item from the navigation bar, closed the popover or dismissed the modally presented view controller). On top of that you can actually unwind through not only one … Read more
Try this #import <QuartzCore/QuartzCore.h> // not necessary for 10 years now 🙂 … view.layer.cornerRadius = 5; view.layer.masksToBounds = true; Note: If you are trying to apply rounded corners to a UIViewController‘s view, it should not be applied in the view controller’s constructor, but rather in -viewDidLoad, after view is actually instantiated.
The view’s window property is non-nil if a view is currently visible, so check the main view in the view controller: Invoking the view method causes the view to load (if it is not loaded) which is unnecessary and may be undesirable. It would be better to check first to see if it is already … Read more