UITableView backgroundColor always gray on iPad (fix)

Here is a quick fix to get rid of gray background color on grouped style UITableView.

if ([tableView respondsToSelector:@selector(backgroundView)]){
            tableView.backgroundView = nil;
        [tableView setBackgroundColor:[UIColor clearColor]];
}

Put double quotes in NSString

Here is a simple way to put  double quotes in your NSString

NSString *myString = @"I say \"Hello!\"";
The output will be
I say "Hello!"

Generate Random Color

Here is a simple method to generate a random color :-
just put this method in any class you want and put the definition in the header file

in .h file
+ (UIColor *) randomColor;

in .m file
+ (UIColor *) randomColor {
    CGFloat red =  (CGFloat)random()/(CGFloat)RAND_MAX;
    CGFloat blue = (CGFloat)random()/(CGFloat)RAND_MAX;
    CGFloat green = (CGFloat)random()/(CGFloat)RAND_MAX;
    return [UIColor colorWithRed:red green:green blue:blue alpha:1.0];
}

get random color by calling this method like this....

//Class Name is the class where you have put the method
UIColor *randColor = [ClassName randomColor];

UIKeyboardBoundsUserInfoKey is deprecated, what to use instead?

From the documentation for UIKeyboardBoundsUserInfoKey:

The key for an NSValue object containing a CGRect that identifies the bounds rectangle of the keyboard in window coordinates. This value is sufficient for obtaining the size of the keyboard. If you want to get the origin of the keyboard on the screen (before or after animation) use the values obtained from the user info dictionary through the UIKeyboardCenterBeginUserInfoKey or UIKeyboardCenterEndUserInfoKey constants. Use the UIKeyboardFrameBeginUserInfoKey or UIKeyboardFrameEndUserInfoKey key instead.

Apple recommends implementing a convenience routine such as this (which could be implemented as a category addition to UIScreen):

+ (CGRect) convertRect:(CGRect)rect toView:(UIView *)view {
    UIWindow *window = [view isKindOfClass:[UIWindow class]] ? (UIWindow *) view : [view window];
    return [view convertRect:[window convertRect:rect fromWindow:nil] fromView:nil];
}

to recover 
window-adjusted keyboard frame size properties.I took a different approach, which involves checking the device 
orientation: 
CGRect _keyboardEndFrame;
[[notification.userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] getValue:&_keyboardEndFrame];
CGFloat _keyboardHeight;
if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) {
    _keyboardHeight = _keyboardEndFrame.size.height;
}
else {
    _keyboardHeight = _keyboardEndFrame.size.width;
}
 
Thanks to Alex Reynolds for the answer
 

Opting Out of Background Execution in iPhone OS 4.0

If you do not want your application to remain in the background when it is quit, you can explicitly opt out of the background execution model by adding the UIApplicationExitsOnSuspend key to your application’s Info.plist file and setting its value to YES. When an application opts out, it cycles between the not running, inactive, and active states and never enters the background or suspended states. When the user taps the Home button to quit the application, the applicationWillTerminate: method of the application delegate is called and the application has approximately five seconds to clean up and exit before it is terminated and moved back to the not running state.
Opting out of background execution may be preferable for certain types of applications. Specifically, if coding for the background may require adding significant complexity to your application, terminating the application may be a simpler solution. Also, if your application consumes a large amount of memory, the system might need to terminate your application quickly anyway to make room for other applications. Thus, opting to terminate, instead of switch to the background, might yield the same results and save you development time and effort.

Customize the default UISlider in iPhone

here is a simple way to customize the UISlider images

UIImage *stetchLeftTrack = [[UIImage imageNamed:@"left-slide.png"]
                                stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
    UIImage *stetchRightTrack = [[UIImage imageNamed:@"right-slide.png"]
                                 stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
    [sldDistanceFilter setThumbImage: [UIImage imageNamed:@"slider_ball.png"] forState:UIControlStateNormal];
    [sldDistanceFilter setMinimumTrackImage:stetchLeftTrack forState:UIControlStateNormal];
    [sldDistanceFilter setMaximumTrackImage:stetchRightTrack forState:UIControlStateNormal];

You just need to replace the image names according to your suite.

Limit Characters in UITextField

Here is a simple delegate method to limit the characters in UITextfield :-

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
        NSUInteger newLength = [textField.text length] + [string length] - range.length;
        return (newLength > 8) ? NO : YES;
}

Difference between signed and unsigend data types

Signed Data Type - a signed data type is one that can hold both positive or negative values, i.e. -1 or +456. A 32 bit signed integer can hold the range -2147483648 to 2147483647

Unsigned Data Type - Unsigned data types can only hold positive values.
An unsigned 32 bit integer for instance can hold the range 0 to 4294967296

Get list of all available fonts with family names in iPhone

Here is the piece of code to get list of all available fonts in your iPhone. This will print the list in gdb          


NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];
            NSArray *fontNames;
            NSInteger indFamily, indFont;
   
            for (indFamily=0; indFamily<[familyNames count]; ++indFamily){
               
                NSLog(@"Family name: %@", [familyNames objectAtIndex:indFamily]);
               
                fontNames = [[NSArray alloc] initWithArray:
                             [UIFont fontNamesForFamilyName:
                              [familyNames objectAtIndex:indFamily]]];
                for (indFont=0; indFont<[fontNames count]; ++indFont){
                   
                    NSLog(@"Font name: %@", [fontNames objectAtIndex:indFont]);
                }
               
                [fontNames release];
            }
   
            [familyNames release];

Funny UIPickerView Animation

//Take a NSTimer object and a integer variable in your header file like this

   NSTimer *timer;
   int ComponentNumber;

//Put this line into your viewDidLoad

    ComponentNumber=0;

    timer = [NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(ChangeComponentNumber) userInfo:nil repeats:YES];


-(void)ChangeComponentNumber
{
    if(ComponentNumber>8)
    {
        [timer invalidate];
        return;
    }
    else if(ComponentNumber==4)
    {
        ComponentNumber=ComponentNumber+1;
        [self performSelector:@selector(HidePickerComponents) withObject:nil afterDelay:0.0];
    }
    else
    {       
        [self performSelector:@selector(HidePickerComponents) withObject:nil afterDelay:0.0];
    }
}
-(void)HidePickerComponents
{   
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.0];   
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:AlarmSoundPicker cache:YES];
    [(UIView*)[[AlarmSoundPicker subviews] objectAtIndex:ComponentNumber] setHidden:YES];   
    [UIView commitAnimations];   
    ComponentNumber=ComponentNumber+1;
   
}

Convert All TimeZones To UTC TimeZone format

//*******Convert Any TimeZone To UTC*******//

-(NSString *)getUTCFormateDate:(NSDate *)localDate
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
    [dateFormatter setTimeZone:timeZone];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *dateString = [dateFormatter stringFromDate:localDate];
    return dateString;
}

Change navigation bar color in iphone sdk

here is how ou change your navigation bar color.

navigationController.navigationBar.tintColor=[UIColor colorWithRed:42/256.0 green:60/256.0 blue:80/256.0 alpha:1.0];

just replace the (42,60,80) to your desired RGB Value.

Core Animation for Mac OS X and the iPhone: Creating Compelling Dynamic User Interfaces

Author: Bill Dudney
Publisher: Pragmatic Programmers, LLC, The on October 15, 2008
Pages: Paperback, 182 pages
Synopsis: Mac OS X Leopard introduces a fantastic new technology that makes writing applications with animated and cinematic user interfaces much easier. We'll explore this new technology by starting with the familiar concepts you already know from the pre-Leopard development kits.

Then we'll see how they apply to the new frameworks and APIs. We'll build on your existing knowledge of Cocoa and bring you efficiently up to speed on what Core Animation is all about.

With this book in hand, you can add Core Animation to your Cocoa applications, and make stunning user interfaces that your user's will be showing off to their friends.
Get the book here

Run your iPhone application on both iPhone OS 2.0 and iPhone OS 3.0 and above versions

first of all in your application delegate create a varaible like this

your appdelegate header file.

float version;

then create property for accessing to another classes

@property (nonatomic, assign) float version;

in appdelegate implementation file

@synthesize version;

in this method

- (void)applicationDidFinishLaunching:(UIApplication *)application {
  
    version =[[[UIDevice currentDevice] systemVersion] floatValue];
    //NSLog(@"Current version no=%f",version);
  }

now in the class where you are getting warning of method deprecations...
in header file of class
declare this

@class yourAppDelegate;

now where you declare instance variable declare your appdelegate.
    yourAppDelegate *AppDelegate;

now in implementation file of the class
import header file of your appdelegate
#import "yourAppDelegate.h"

in the viewDidLoadMethod.

- (void)viewDidLoad {
    [super viewDidLoad];
    AppDelegate=[[UIApplication sharedApplication] delegate];
  }

 now where you are getting warning use this code.I am using temporary statements you can put your code.

if (AppDelegate.version >= 3.0)
    {
       //put your 3.0 code here
        NSLog(@"Current OS VErsion %f",AppDelegate.version);
        cell.textLabel.text=cellValue;
        [cell.textLabel setFont:[UIFont systemFontOfSize:15.0]];
        [cell.textLabel setLineBreakMode:UILineBreakModeTailTruncation];// iPhone 3.0 code here
    }   
    else   
    {
        //put your 2.0 code here
        NSLog(@"Current OS VErsion %f",AppDelegate.version);
        cell.text=cellValue;   
        [cell setFont:[UIFont systemFontOfSize:15.0]];
        [cell setLineBreakMode:UILineBreakModeTailTruncation];
    } 










use this everywhere to get rid of those warnings..

now the final part.

set active target device 3.0 debug.

change base sdk to 3.0

and change deployment target to iphone os 2.0.

note you will get warnings but don't worry it will work fine.

to check it's working run your app in any iphone which have 2.0 OS.

if you don't have iPhone with OS 3.0 check in simulator.

Upgrading your iPhone OS 2.0 Application to 3.0 and Handle Deprecation Warnings

The warnings I was getting are as follows:
warning: ’setImage:’ is deprecated (declared at /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/
iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/
Headers/UITableViewCell.h:199)
warning: ’setText:’ is deprecated (declared at /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/
iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/
Headers/UITableViewCell.h:199)
Before…

//This worked perfect in OS 2.0 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *UserSettingButtonCellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:UserSettingButtonCellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier: UserSettingButtonCellIdentifier] autorelease]; } NSUInteger row = [indexPath row]; UserSetting *rowData = [list objectAtIndex:row]; UIImage *image = [UIImage imageNamed:@"MyImage.png"]; if (row != 0) cell.image = image; //WARNING here cell.text = rowData.name; //WARNING here [rowData release]; return cell; } //the tableView method is completely deprecated. - (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath { return UITableViewCellAccessoryDisclosureIndicator; }

After, doing the mods to get rid of the deprecated warnings:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *UserSettingButtonCellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:UserSettingButtonCellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier: UserSettingButtonCellIdentifier] autorelease]; } NSUInteger row = [indexPath row]; UserSetting *rowData = [list objectAtIndex:row]; UIImage *image = [UIImage imageNamed:@"MyImage.png"]; if (row != 0) cell.imageView.image = image; //FIXED here cell.textLabel.text = rowData.name; //FIXED here   #ifdef __IPHONE_3_0 //This is a replacement for the tableView method cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; #endif   [rowData release]; return cell; } #ifndef __IPHONE_3_0 - (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath { return UITableViewCellAccessoryDisclosureIndicator; } #endif

find the documents directory on the iPhone in Just One Line Code

there are quite a few ways to find the documents directory on the iPhone. For those of you who don’t know, the documents directory of an application is the location where you should save your application data. While finding the documents directory is a trivial task, it is very important when coding most applications. Apple has provided quite a few ways for resolving the path to this directory.
If you read through some of Apple’s sample code, you will see their code to do this is generally 3 or 4 lines long. This seems like a lot of code to perform such a simple task. Here is a nice one-line of code for you to use in your applications.

[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/YourDatabaseFileNameWithExtension"];

Here is the old method i was using before i found this on icodeblog.com...thanks to Brandon.

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *MyDatabasePath = [documentsDirectory stringByAppendingString:@"/YourDatabaseFileNameWithExtension"];

Debugging From Xcode To Real Device(Jail-Broken)

Some random iPhone stuff

Have fun ...

Using gdb to debug on the iPhone (no need for OSX)

The goal here is to debug application on real-hardware. To do that you must follow some conditions :

• Get gdb itself

  Good news, gdb is now available on cydia. So you can install it very easily. It comes all setup with all the needed signature / entitlements to have full functionalities. If you're interested in building it yourself, you'll find the original apple sources and the needed patches / build scripts on the telesphoreo repository

  The other way (previously only way) is to grab it from the SDK. Inside the .dmg you will find a package named iPhoneHostSideTools.pkg. Inside, there is Platforms/iPhoneOS.platform/Developer/usr/libexec/gdb/gdb-arm-apple-darwin. Just copy it to the iPhone, it's a universal binary that supports armv6 just fine.
  gdb is under GNU licence so you should be free to redistribute the binary as well I think.

  For information, the original Apple source are here.

  To enhance functionality you should add some entitlements to the apple binary. Use theses : for codesign, for ldid. To apply them :

  codesign -s "iPhone developer" --entitlements gdb.xcent -f gdb-arm-apple-darwin
  
  or
  
  ldid -Sgdb.xml gdb-arm-apple-darwin
      

• Taget armv6

  Apple's modified gdb is kinda picky. It will only work properly on ARMv6 arch. ARM isn't sufficient ... You can see the different in cpusubtype in the output of otool :

  lain:iPhone tnt$ otool -h test.arm
  test.arm:
  Mach header
       magic cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
  0xfeedface      12          0  0x00          2    12        860 0x00000085
  
  lain:iPhone tnt$ otool -h test.armv6
  test.armv6:
  Mach header
       magic cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
  0xfeedface      12          6  0x00          2    12        860 0x00000085
      

  To make sure of that you must make sure you have -arch armv6 (or -march=armv6 -mcpu=arm1176jzf-s, depending on your compiler) in you CFLAGS / LDFLAGS. Like this :

  /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.0 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.0.sdk test.c -o test
      

• Sign the binary with entitlements

  Update: Actually if you used the entitlements I provide to sign gdb, or if you used the gdb of cydia, this step is no longer required.

  Next, you need to sign the binary you want to debug with entitlements. For details on that, see the 'Using XCode with Pwned iPhone', it's described there. I do it with codesign on OSX but ldid also support theses.

  If you're planning on doing it with ldid, the easier it to apt-get install it on your phone and do it there.

  ldid -Smyapp.xml myapp
      

  The myapp.xml is the XML file describing the entitlements. I generate them using a simple script but for this simple purpose you could just always use a static one that would look like this :

  
  
  
   
     application-identifier
     test
     get-task-allow
     
   
  
      

  Update : If you applied enhanced entitlements to gdb as described in the first point, you don't need entitlements on your binary.

Using XCode with Pwned iPhone

The idea here is to use the official SDK to create applications without having to pay for an 'official' certificate and provisioning profile.

Note that the instructions here are experimental. I can't be held responsible for whatever happens if you try them ... That being said, I can hardly imagine any issue that couldn't be solved by a DFU restore ...

Make Build & Go" + Debugging works

If you're not a fully registred / paying developer, you can use XCode to compile apps but some functions won't work. Like the 'Build & go' button, the automatic signing or the debugger. It's however possible to make them work ! Just follow the steps ...

• Create a self-signed signing certificate

  Apple has a nice page explaining how to do that. Make sure to name your certificate 'iPhone developer'.

• Add a custom build step to sign executables

  A pwned iPhone doesn't need a valid signature ... but it still needs one, or at least the hashes ... (for more details see on www.saurik.com). Jay Freeman made a small utility called ldid that add thoses hashes. However here we will use the official codesign utility, provided by Apple, with our self-signed identity.

  To make remote debugging work, we also need to add entitlements to the Application. This will be handled by codesign as well. We will however need a small python utility gen_entitlements.py to generate the entitlement file. Download it, place it somewhere on your disk and make it executable.

  So, to execute codesign properly during the build, you will need to add a custom build step to each of your XCode projects. Select the menu options "Project > New Build Phase > New Run Script Build Phase", and enter the following script (don't forget to replace /Users/youruser/bin by the correct path to gen_entitlements.py) :

  export CODESIGN_ALLOCATE=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate
  if [ "${PLATFORM_NAME}" == "iphoneos" ]; then
   /Users/youruser/bin/gen_entitlements.py "my.company.${PROJECT_NAME}" "${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/${PROJECT_NAME}.xcent";
   codesign -f -s "iPhone developer" --resource-rules "${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/ResourceRules.plist" \
     --entitlements "${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/${PROJECT_NAME}.xcent"  "${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/"
  fi
      

• Remove signature checks from MobileInstallation & SpringBoard

  The final step is to bypass some security checks in some executable. The idea is simple to patch them, using a small software. Of course, after patching, you need to re-generate a signature for the new binaries to get loaded properly. All-in-all, it's easier to do all that on your Mac. So open a console and cut & paste the instructions (I assume you have ssh on the iPhone and that it's IP is 192.168.0.1) :

  The binary patch has been written for 2.0.0 and I didn't get a change to test/update it to 2.0.1 ... so make sure you have a backup of the files and an active ssh if needed

  osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$ osx:~ user$

  mkdir iphone_tmp cd iphone_tmp scp root@192.168.0.1:/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation . scp root@192.168.0.1:/System/Library/CoreServices/SpringBoard.app/SpringBoard . cp MobileInstallation MobileInstallation.bak cp SpringBoard SpringBoard.bak curl -O http://www.246tNt.com/iPhone/iphone_binary_patch curl -O http://www.246tNt.com/iPhone/SpringBoard.xcent chmod +x ./iphone_binary_patch ./iphone_binary_patch export CODESIGN_ALLOCATE=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate codesign -s "iPhone developer" -f MobileInstallation codesign -s "iPhone developer" --entitlements SpringBoard.xcent -f SpringBoard scp MobileInstallation root@192.168.0.1:/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation scp SpringBoard root@192.168.0.1:/System/Library/CoreServices/SpringBoard.app/SpringBoard

  Finally, reboot the phone ... and enjoy :) Note that you may have to restart XCode and re-plug the iPhone for the connection to work. Also, if you had done previous attempts without following this how-to, you might need to clear the /var/mobile/Media/PublicStaging directory on the iPhone.

source taken from:--http://www.246tnt.com/iPhone/#xcode

Clang GUI

use Clang GUI Front-End to Check Your Errors in Your Objective-c Code

Use the tool at this site:
http://www.karppinen.fi/analysistool/

This is Very Useful To Find Errors..just Ignore The m Prefix Warning..

How To Use Like Statement In Objective-c

To Use Like Statement In Objective-c

First Take A Temporary String like this

NSString *temp = [NSString stringWithFormat:@"%%%@%%", yourString];

now here is an example on how to use this

NSMutableString *query = [[NSMutableString alloc] initWithFormat:@"select flashCardId,flashCardText from Table where flashcardtext like '%@' and categoryId=%d",temp,categoryid];

PhoneView 2.2.2

PhoneView 2.2.2
Mac App | 9mb | Rs,Hf
PhoneView (formerly MegaPhone) is the desktop companion for iPhone and iPod Touch. This Mac OS X application which lets you use your iPhone or iPod Touch for file storage, provides note adding and editing, and easy access to your iTunes, iPhoto and notes, SMS, contacts and call history data. Convert your text, Word or PDF files into iPhone notes. It features drag and drop, making it fast and easy to move files back and forth between the Mac and iPhone.


Features:

In addition, PhoneView you can:

Create iPhone Notes on your Mac.
Store any type of data.
Access your music, videos, podcasts and photos.
Access notes, SMS, contacts and call history stored on the iPhone.
Convert your text, Word or PDF files into iPhone notes.
Move files between work and home.
Back up important data to your iPhone.
Keep useful apps and installers with you at all times.

Simple interface.
Store any type of files.
Access music, videos, podcasts and photos.
Instant access to Notes.
Easily create new Notes.
Export iPhone SMS and recent calls.
Use your iPhone for backup.
Bring your data between home and office.


More Info:
Homepage


Download Links :

Download Here





or

Here

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