iphone

How to reload a ViewController in IOS using Objective-C

 

To reload a UITableViewController in IOS using Objective-C you can simply use the reloadData method of the ViewController.

//MyTablViewController is a UITableViewController
[MyTableViewController.tableView reloadData]

How to hide the status bar while Splashscreen is Shown in IOS

 

To hide the status bar while Splashscreen is Shown in IOS follow these Steps.

  • 1. Open the Info.plist File.
  • 2. Search for the “Status bar is initially hidden” property and set it to checked.

    • if you do not have the “Status bar is initially hidden” property, simply add it by selecting the last line in the File and then click the plus button on the right end of the line.

    To show the status bar you can use this snippet.

    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone]; //UIStatusBarAnimationNone, UIStatusBarAnimationFade or UIStatusBarAnimationSlide

    How to use substring in IOS using Objective-C

     

    To use substring in IOS using Objective-C you can use the snippet below.

    Sample Objective-C

    NSString *myString = @"http://codesnippets.fesslersoft.de";
NSString *myNewString = [myString substringFromIndex:7]; //myNewString will be "codesnippets.fesslersoft.de"

    How to autosize UILabel to Textsize in IOS using Objective-C

     
    labelTest.text = @"This is my Teststring.This is my Teststring.This is my Teststring.This is my Teststring.This is my Teststring.This is my Teststring.";
labelTest.numberOfLines = 0;
[labelTest sizeToFit];

    How to clear notifications in IOS using Objective-C

     

    To clear notifications in IOS using objective-c you can use the snippet below.

    Sample Objective-C

    //in method: application:didFinishLaunchingWithOptions
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];

//in method: application:didReceiveRemoteNotification
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 1]; //we need to to increment first
[[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];

    How to format a float to 2 decimal places in Objective-C

     

    To format a float to 2 decimal places in Objective-C you can use the following snippet.

    Sample Objective-C

    NSString* formattedVariable = [NSString stringWithFormat:@"%.02f", myFloatVariable];

    How to set the ios bookmark icon in HTML

     

    To set the ios bookmark icon in HTML you can use the following snippet.

    Sample HTML

    <link rel="apple-touch-icon" href="iOs_Icon.png"/>

    If your icon is already glossy, you can prevent the device from adding its own gloss by using.

    Sample HTML

    <link rel="apple-touch-icon-precomposed" href="iOs_Icon.png"/>

    How to detect a screen orientation change in Javascript

     

    To detect a screen orientation change in Javascript you can use the following snippet.

    Sample Javascript

    window.addEventListener("orientationchange", function() {
	//0 = potrait
	//90 or -90 = landscape left or landscape right
}, false);

    some devices do not fire the orientationchange event, try the resize event instead.

    Sample Javascript

    window.addEventListener("resize", function() {
	// check screen size (inner and outer!)	
}, false);