Re: access property
Re: access property
- Subject: Re: access property
- From: Evan Schoffstall <email@hidden>
- Date: Mon, 14 Nov 2011 11:43:32 -0500
Surely. There are two options in writing observations.
One, Observe all properties. Instead of adding an observer for each, a simple for loop and access to the Objective-C runtime should do the trick. http://stackoverflow.com/questions/1910449/observing-a-change-to-any-class-property-in-objective-c
Second, Observe specified properties: [self addObserver:self forKeyPath:@"myPrefsVal" options:NSKeyValueObservingOptionNew context:nil];
Implement that under awakeFromNib or init depending on your super type.
If implemented, every time that myPrefsVal changes a message will be sent to observeValueForKeyPath:ofObject:change:context
which MUST be implemented by you
Add the below method--
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
}
To the observeValueForKeyPath method, you must here send myPrefsVal to whatever object you want.
All of the above is in Objective-C, you'll have to translate it into ASOC.
I suggest you read up on Key-Value-Coding (KVC) as apple will answer all your questions under this documentation: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/KeyValueCoding/Articles/KeyValueCoding.html
--
Evan Schoffstall
Sent with
SparrowOn Monday, November 14, 2011 at 11:12 AM, droom departement wrote:
Evan,
can you set me a little more in the "observer" direction ?
Or can you give me an url to an example ?
2011/11/14 Evan Schoffstall
<email@hidden>
If you mean to say get a value every x seconds than okay..
Use NSTimer
If you mean to say you want to get the value of a property when it changes (which makes more sense)
Try adding an observer.
--
Evan Schoffstall
Sent with
Sparrow On Monday, November 14, 2011 at 10:07 AM, droom departement wrote:
No, I just like to get "from time to time" the value of a certain property.
2011/11/14 Evan Schoffstall
<email@hidden>
Did you try something like
set myObject to dbViewController's new()
set myString to myObject's myPrefsVal
--
Evan Schoffstall
Sent with
Sparrow
On Monday, November 14, 2011 at 9:02 AM, droom departement wrote:
How can I get the value of a property: myPrefs (declared in an objective-C class) from within an applescript class ?
the objective-C class:
@interface dbViewController : NSObject {
NSString *myPrefsVal;
}
@property (nonatomic, retain) NSString *myPrefsVal;
...
@end
@implementation dbViewController
@synthesize myPrefsVal;
...
@end
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