macOS Detecting second and third launch using "prevStartupVersions"

G

gwelmarten

macrumors 6502

Original poster

• May 5, 2012

• #1

Hi
I'm detecting the number of times my Mac application has being opened using the following code:

Code:

 NSString *currentVersion = (NSString*)[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];
    NSArray *prevStartupVersions = [[NSUserDefaults standardUserDefaults] arrayForKey:@"prevStartupVersions"];
    if (prevStartupVersions == nil) 
          {
          }
     else {
          }
 [[NSUserDefaults standardUserDefaults] synchronize];

However, this only works for detecting the first launch. How would I detect a second and third launch? I did try:

Code:

if (prevStartupVersions == 1)

However, I am comparing an NSArray with an Interger there. How should adapt this to detect a second launch?

Thanks in advance for any help,

Sam

 

P

PatrickCocoa

macrumors 6502a

• May 5, 2012

• #2

NSArray length

How about

Code:

if ([prevStartupVersions length] == 1)

 

G

gwelmarten

macrumors 6502

Original poster

• May 5, 2012

• #3

No luck I'm afraid :

Code:

'NSArray' may not responnd to 'length'

 

chown33

Moderator

Staff member

• May 5, 2012

• #4

gwelmarten said:

No luck I'm afraid :

Code:

'NSArray' may not responnd to 'length'

Click to expand...

Read the reference doc for NSArray. Look up the count method.