Suraj Ramjan Mirajkar

Once i was coding and got stuck over removing spaces from NSString. To trim preceding, succeeding & white spaces in between  a NSString use below snippet:     NSString *whitespaceString = @"      This   is  a        string   with       white      spaces         " ;   NSLog ( @"String before trimming white spaces: %@" , whitespaceString);   whitespaceString = [whitespaceString stringByTrimmingCharactersInSet :[ NSCharacterSet whitespaceCharacterSet ]];   while ([whitespaceString rangeOfString : @" " ]. location != NSNotFound )   whitespaceString = [whitespaceString stringByReplacingOccurrencesOfString : @" " withString : @" " ];   NSLog ( @"String after trimming white spaces: %@" , whitespaceString); OR - A better approach using NSPredicate     NSString *stringWithSpaces = @"      this is    my text  with     lots  of          spaces which is bothering              me";     NSChar

Apple has really turned world upside down with its new and awesome iOS 7. iOS 7 introduces new design, changed icons, upgraded built-in apps and lots of great features. iOS 7 Features: 1. iTunes Radio. 2. More Smart Siri. 3. Anti Theft Feature - Activation Lock. 4. A Better Notification Center. 5. Control Center. 6. Intelligent Multitasking. 7. Audio-only FaceTime Calls. 8. Inclinometer. 9. Photos and Video Improvement. 10. Airdrop. 11. Enhanced Safari. 12. Improved Apple Maps. You can find more details about iOS 7: Link 1 Link 2 Link 3

Code snippet to demonstrate how to use NSMutableAttributedString:     UILabel *lblTitle = [[ UILabel alloc ] init ];     [lblTitle setFrame : CGRectMake ( 2 , 180 , 320 , 25 )];     [ self . view addSubview :lblTitle];          NSString *strHello = @"Hello, this is a Demo of NSMutableAttributedString" ;     NSRange range;     NSMutableAttributedString *stringAttributed = [[ NSMutableAttributedString alloc ] initWithString :strHello];     [stringAttributed addAttribute : NSFontAttributeName value :[ UIFont fontWithName : @"Arial" size : 14.0 ] range : NSMakeRange ( 0 , [strHello length ])];     range = [strHello rangeOfString : @"NSMutableAttributedString" ];     [stringAttributed addAttribute : NSFontAttributeName value :[ UIFont boldSystemFontOfSize : 13.0 ] range :range];     range = [strHello rangeOfString : @"Demo" ];     [stringAttributed addAttribute : NSForegroundColorAttributeName value :[ UICo

In iOS6 for interface orientation  shouldAutorotateToInterfaceOrientation:  method is deprecated. If you want to make only one controller to orient in all directions but want to restrict a single controller to a specific direction like Portrait then follow: 1. Subclass a UINavigationController and inherit it 2. Override few orientation methods in ViewController in which you want or restrict the orientation support. - ( BOOL )shouldAutorotateToInterfaceOrientation:( UIInterfaceOrientation )interfaceOrientation -( BOOL )shouldAutorotate -( NSUInteger )supportedInterfaceOrientations If you want to restrict a ViewController to rotate only in Portrait mode then add code: #pragma Orientation (override methods) - ( BOOL )shouldAutorotateToInterfaceOrientation:( UIInterfaceOrientation )interfaceOrientation {     return (interfaceOrientation == UIInterfaceOrientationPortrait ); } -( BOOL )shouldAutorotate {     return NO ; } -( NSUInteger )supporte

To make a Gradient UIButton follow below code snippet:     UIButton *btn = [ UIButton buttonWithType : UIButtonTypeCustom ];     [btn setFrame : CGRectMake ( 90 , 120 , 140 , 32 )];     [btn setTitle : @"Gradient Button" forState : UIControlStateNormal ];     [btn setTitleColor :[ UIColor whiteColor ] forState : UIControlStateNormal ];     [btn. titleLabel setFont :[ UIFont boldSystemFontOfSize : 14 ]];     [ self . view addSubview :btn];          CAGradientLayer *layer1 = [ CAGradientLayer layer ];     NSArray *colors = [ NSArray arrayWithObjects :                        ( id )[ UIColor lightGrayColor ]. CGColor ,                        ( id )[ UIColor blackColor ]. CGColor ,                        nil ];     [layer1 setColors :colors];     [layer1 setFrame :btn. bounds ];     [btn. layer insertSublayer :layer1 atIndex : 0 ];     btn. clipsToBounds = YES ; Final output will look as follows:

To add gradient layer to Navigationbar follow below code snippet: UINavigationBar *navigationBar = [[ UINavigationBar alloc ] initWithFrame : CGRectMake ( 0 , 0 , 320 , 44 )];     [ self . view addSubview :navigationBar];    // navigationBar.tintColor = [UIColor colorWithRed:.7 green:.5 blue:.2 alpha:1];     UINavigationItem * item = [[ UINavigationItem alloc ] initWithTitle : @"Nav Bar" ];     [navigationBar pushNavigationItem :item animated : YES ];      // Set gradient      CAGradientLayer *gradient = [ CAGradientLayer layer ];     gradient. frame = CGRectMake ( 0 , 0 , 320 , 44 );     NSMutableArray *cgColors = [[ NSMutableArray alloc ] init ];     [cgColors addObject :( id )[[ UIColor colorWithRed : 1.0                                              green : 0.0                                               blue : 0.0                                              alpha : 0.2 ] CGColor ]];     [cgColors addObject :( id )[[ UIColo

If you have an application in which you want to take user reviews and want to provide a star rating, you are in a big trouble cause Cocoa Touch (iPhone) does not provide any UIControl for it. You have to create your own control for this using touch detection or gesture recognition. In following tutorial i have detected point of touch for achieving my goal. 1. Here i have added a UIView - viewForStarRating on which i placed 5 UIImageViews - imgViewStar1, imgViewStar2, imgViewStar3, imgViewStar4 and imgViewStar5 on my Nib file and set outlet to each. 2. Declare two CGPoints - touchStartPoint and touchCurrentPoint, these CGPoints will give me my touch coordinates. 3. In my implementation file i added touchesBegan and touchesMoved delegate methods. 4. In touchesBegan delegate :    UITouch *touch = [touches anyObject ];    self . touchStartPoint = [touch locationInView : self . viewForStarRating ];    NSLog ( @"Touch detected at: x = %f and y = %f" ,

In iOS 6 many methods are being deprecated. 1. For UILabel below methods are deprecated. Deprecated in iOS6: [ self .myLabel setLineBreakMode : UILineBreakModeWordWrap ]; [ self .myLabel setMinimumFontSize : 14 ]; [ self .myLabel setTextAlignment : UITextAlignmentLeft ]; Implementation in iOS6: [ self .myLabel setLineBreakMode : NSLineBreakByWordWrapping ]; [ self .myLabel setMinimumScaleFactor : 14 ]; [ self .myLabel setTextAlignment : NSTextAlignmentCenter ]; 2. For presenting and dismissing ModalViewController Deprecated in iOS6: [ self presentModalViewController :splashViewController animated : NO ]; [ self dismissModalViewControllerAnimated : YES ]; Implementation in iOS6: [ self presentViewController :splashViewController animated : NO completion : nil ]; [ self dismissViewControllerAnimated : YES completion : nil ];