Source : www.raywenderlich.com

Source:

www.galuca.com

• Disconnect your device.
• Delete the app from your device.
• Quit xcode (Don’t just simply close the window, quit it)
• Delete derived data folder (~/Library/Developer/Xcode/DerivedData/-asdadwqerwdaergdnfg – or something like that)
• Now start Xcode, connect device and run the project.

I have read through quite a few ways about how to “fix” this problem and with that how to scroll a view or a scrollview in order to avoid hide a UITextField or a UITextView when the keyboard is on the screen.

But here is the best and easiest solution that I have found (in my opinion).

It’s the Michael Tyson TPKeyboardAvoiding Class: A drop-in universal solution for moving text fields out of the way of the keyboard in iOS. Just download the project and read the README file, to know how use it.  I have tested it and works like a charm.

More Information:

• A Tasty Pixel

• TPKeyboardAvoiding

1-. First you need to set the delegate for each UITextField un you xib to your controller.
2.- You need to define the “tab-order” by setting the tag property for each UITextField

Then implement the following code in you .m controller

-(BOOL)textFieldShouldReturn:(UITextField*)textField;
{
  NSInteger nextTag = textField.tag + 1;
  // Try to find next responder
  UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];
  if (nextResponder) {
    // Found next responder, so set it.
    [nextResponder becomeFirstResponder];
  } else {
    // Not found, so remove keyboard.
    [textField resignFirstResponder];
  }
  return NO; // We do not want UITextField to insert line-breaks.
}

Source:
Stackoverflow

[myNavbar setBackgroundImage:[UIImage imageNamed: @"UINavigationBarBackground.png"] 
               forBarMetrics:UIBarMetricsDefault];

Now, if you want to apply the background to all your navbar in your app, uses the following line in the appdelegate, instead of repeating the previous one inside each controller:

[[UINavigationBarappearance] setBackgroundImage:[UIImageimageNamed:@"UINavigationBarBackground.png"] forBarMetrics:UIBarMetricsDefault];

NSDate*curentDate =[NSDate date];
NSCalendar* calendar =[NSCalendar currentCalendar];
NSDateComponents* compoNents =[calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:curentDate];// Get necessary date components
[compoNents month]//gives you month
[compoNents day]//gives you day
[compoNents year]// gives you year

More info:
NSDateComponents Class Reference

If you have a .cvs file something like this:

Na,e|LastName|Age|Address
Jesus|Guerra|28|Sonora

And you want to remplace the Pipe for a Tab yo can open your terminal an use the following command:

cat test.csv | tr '|' '\t' > output.csv

Source:
Code School