iOS Execute code only for first time the app starts..

A

AbhishekApple

macrumors member

Original poster

Aug 5, 2010

86

0

• Oct 29, 2010

• #1

I want to Execute code only for first time the app starts...so that this code or file should not execute when user restarts the app....

Actually i want to store array in a file system of iphone. This array is editable,

Code:

Viewdidload(){
NSMutableArray *countriesToLiveInArray = [NSMutableArray arrayWithObjects:@"Iceland", @"Greenland", @"Switzerland", @"Norway", @"New Zealand", @"Greece", @"Italy", @"Ireland", nil];

code to : Save array to file abc

reload data from saved file abc
}

button_editclick{
Save array to file abc

reload data from saved file abc
}

if user edits the record i will save the edited array to file but if user restarts the app it will again reload the static array and will erase the edited record...

Plz suggest on this..

 

A

AbhishekApple

macrumors member

Original poster

Aug 5, 2010

86

0

• Oct 29, 2010

• #2

Is this possible through programming or i will have to create filename.plist

 

F

firewood

macrumors G3

Jul 29, 2003

8,149

1,400

Silicon Valley

• Oct 29, 2010

• #3

Just check the filesystem to see if the app has already saved the file. If not, then it's the first time (or the user deleted and reinstalled the app).

 

plinden

macrumors 601

Apr 8, 2004

4,029

143

• Oct 29, 2010

• #4

Seems to me this would be a candidate for NSUserDefaults rather than rolling your own code.

 

chown33

Moderator

Staff member

Aug 9, 2009

11,459

9,705

A sea of green

• Oct 29, 2010

• #5

Here's the basic logic of what you want.
New is hilited in blue. Remove with line through it.

Code:

Viewdidload(){
[COLOR="Blue"]if saved file abc doesn't exist
{[/COLOR]
  NSMutableArray *countriesToLiveInArray = [NSMutableArray arrayWithObjects:@"Iceland", @"Greenland", @"Switzerland", @"Norway", @"New Zealand", @"Greece", @"Italy", @"Ireland", nil];

  code to : Save array to file abc
[COLOR="blue"]}[/COLOR]

reload data from saved file abc
}

button_editclick{
[s]Save array to file abc[/s]

reload data from saved file abc
}

 

A

AbhishekApple

macrumors member

Original poster

Aug 5, 2010

86

0

• Nov 1, 2010

• #6

thnkx for the reply guys....

i did that through plist....

the task was to keep the static user details on iphone (app), which gets loaded when user starts the app...User can also edit the user details which should get stored back to the file..

so during apploading i initialized an array with the file content and while terminating i saved back to the file...