iOS 6 Programming Cookbook

By Vandad Nahavandipoor

Overcome the vexing matters you’ll necessarily confront whilst developing apps for the iPhone, iPad, or iPod contact. by way of using new and revised recipes during this up to date cookbook, you’ll quick examine the stairs essential to write whole iOS apps—including how you can shop and guard facts, increase and animate images, deal with documents and folders, and make the most of Passbook.

Thoroughly up to date for iOS 6 SDK, this cookbook exhibits you ways to take advantage of hundreds of thousands of strategies to resolve difficulties that builders of all degrees regularly face. each one recipe contains pattern code you should use correct away.

  • Use go package to convey digitally-signed passes equivalent to loyalty cards
  • Define the format of UI components with Cocoa automobile Layout
  • Develop location-aware apps
  • Get operating examples for imposing gesture recognizers
  • Use new Objective-C Runtime features
  • Play audio and video records and entry the iPod library
  • Retrieve contacts and teams from the tackle Book
  • Determine digital camera availability and entry the photograph Library
  • Create multitasking-aware apps
  • Use occasion equipment to control calendars, dates, and events
  • Apply the accelerometer and gyroscope
  • Enhance your app with the iCloud service

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ButtonShare = [UIButton buttonWithType:UIButtonTypeRoundedRect]; self. buttonShare. translatesAutoresizingMaskIntoConstraints = NO; self. buttonShare. body = CGRectMake(20. 0f, eighty. 0f, 280. 0f, forty four. 0f); [self. buttonShare setTitle:@"Share" forState:UIControlStateNormal]; [self. buttonShare addTarget:self action:@selector(handleShare:) forControlEvents:UIControlEventTouchUpInside]; } [self. view addSubview:self. buttonShare]; after we are performed with that, we simply need to name those tools within the viewDid Load approach to our view controller. this can let the UI elements to be put on the view of our view controller: - (void)viewDidLoad{ [super viewDidLoad]; [self createTextField]; [self createButton]; } - (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; } within the textFieldShouldReturn:, all we do is push aside the keyboard with a purpose to renounce the textual content field’s lively kingdom. This easily signifies that while a consumer has been modifying the textual content 154 | bankruptcy 2: Implementing Controllers and perspectives field after which presses the Return/Enter button at the keyboard, the keyboard can be pushed aside. take into account that the createTextField approach that we simply coded has set our view controller because the delegate of the textual content box. So we need to enforce the aforementioned strategy as follows: - (BOOL) textFieldShouldReturn:(UITextField *)textField{ [textField resignFirstResponder]; go back certain; } final yet no longer least is the handler approach to our button. As you observed, the createButton approach creates the button for us and elects the handleShare: approach to deal with the contact down inside of motion of the button. So let’s code this system: - (void) handleShare:(id)paramSender{ if ([self. textField. textual content size] == 0){ NSString *message = @"Please input a textual content after which press Share"; UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alertView show]; go back; } self. activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[self. textField. textual content] applicationActivities:nil]; [self presentViewController:self. activityViewController animated:YES completion:^{ /* not anything for now */ }]; } Now in the event you run the app, input a few textual content within the textual content box, after which press the percentage button, you'll discover whatever just like determine 2-36. See additionally Recipe 2. 27 2. 12 enforcing Navigation with UINavigationController challenge you ought to permit your clients to maneuver from one view controller to the opposite with a soft and integrated animation. 2. 12 imposing Navigation with UINavigationController | a hundred and fifty five Figure 2-36. Sharing concepts displayed for the example of string that we're attempting to proportion resolution Use a UINavigationController widget. dialogue If you’ve used an iPhone, iPod contact, or iPad prior to, likelihood is that you've got already visible a navigation controller in motion. for example, should you visit the Settings app in your mobile after which press an alternative comparable to Wallpaper (Figure 2-37), you can find the Settings’ major reveal get pulled out of the reveal from the left and the Wallpaper monitor pushing its manner into the reveal from the correct.

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