Hello, I think I have a problem, maybe linked to a retain cycle in Core-Data. The code is a follow, where self.image is also a NSManagedObject: - (void)setImage:(UIImage*)image1 andThumbnail:(UIImage*)image2 { self.image.data = UIImageJPEGRepresentation(image1, 0.85); // This is autoreleased self.thumbnail = UIImageJPEGRepresen...
Hello, As everyone knows, setTitle automatically retains the string passed as a parameter. When the button caption needs to be changed, I guess that it is necesary to release the current (old) string before setting the new one. I wonder what is the most elegant way to dot it. See my code sample (here, getPlayerHandFromGame method produ...
I am creating an NSArray from a URL that points to a plist NSLog(@"_url rc:[%d]",[_url retainCount]); //prints "_url rc:[1]" content = [NSArray arrayWithContentsOfURL:_url]; NSLog(@"_url rc:[%d]",[_url retainCount]); //prints "_url rc:[10]" I'm completely at a loss as to why this is occurring. Let me know if you need further informat...
The problem, that if the else is executing, increment of S will not accomplish. Any idea? data osszes_folyositas; set osszes_tabla; retain old_xname; retain s 0; if xname ne old_xname then do; old_xname = xname; s = 0; end; else do; s = s + Foly_s_tott_t_rgyh_ban_HUF; delete; end; run; ...
Ok, I think its possible I've misunderstood the correct way to implement an external screen on the iPad and it is causing me a lot of headaches. Since this is a long post, what I'm trying to do is create and send a view to an external screen over VGA, and remove the screen once I'm done with it. I'm having retain count issues so can't ge...
I've seeen the following snippet quite a bit: In the header: SomeClass *bla; @property(nonatomic,retain) SomeClass *bla; In the implementation file: @synthesize bla; and then self.bla = [[SomeClass alloc] init]; I think that this assignment puts the retain count for 'bla' up by two; once through the alloc/init call, then throug...
Hi, I have been using ojective c for almost a week, and I am mainly a c++ coder. After I read Apple's memory management guide, I try to bring my memory usage style in c++ into objective c... I tried to conclude these scenarios, I think I won't make memory mistake if I follow these instructions. Please kindly let me know if I am wrong :...
NSMenuItem -setTarget: Does it retain the target, or should one explicitly retain it? I've seen conflicting docs on this. I know of retainArguments in NSInvocation, but I'm not sure this applies to NSMenuItem as it doesn't inherit from NSInvocation. ...
Hi, Just need 2 really basic clarifications. 1. Lets say I have a class A which has a member delcared like: @property (nonatomic,retain) NSString* stringInstanceVariable ; In one of my methods, I want to initialize stringInstanceVariable to be some string. Do I need to retain it or not ? should I call: stringInstanceVariable = [[NS...
In my .h file I have a NSMutableArray *locationsArray defined with a property as follows @property (nonatomic, retain) NSMutableArray *locationsArray In my .m file I was displaying a table view, this loaded fine until I tried to roll-up at which point I it crashed with bad access. This was due to the locationsArray not being retained...
I'm having a recurring problem in Objective-C. I'm either releasing things too many time, or not enough. or perhaps I'm not retaining them enough... Can someone point me at a good reference that will give me a rule of thumb on when I need to retain and release? For example: I remember reading somewhere that some objects come pre-ret...
I have a real-life example that I have in my project below. My aim is to pick out the most likely phone number for SMS receptions, and only that (phone)number. All works well when I don't release memory at the end, but we can't have that, can we. My question is: Where (and how) is the correct way to release memory in the example below? ...
I have a class I wrote called Location that just holds some strings. I'm using two instances of that class in a view controller, and when I initialize the two variables in viewDidLoad, they work fine for that method, but then when I try to use them later they are null. I have them set as retained properties. I have tested them and kno...
I have this bit of code: CFDictionaryRef lDictionary = AACreateDictionaryForFile(path); if (lDictionary) { printf("retct before: %ld\n", CFGetRetainCount(lDictionary)); CFMakeCollectable(lDictionary); printf("retct after: %ld\n", CFGetRetainCount(lDictionary)); return TRUE; } else { return FALSE; } Su...
I have an app that parses an XML doc & pulls out the info it needs. There are often a few matching items so the code iterates a few times. Instruments' Leaks tool keeps saying there is a leak on this line, self.currentDiscountedPrice = [parsedCharacters substringToIndex:(fullStopRange.location + 3)]; currentDiscountedPrice is a var de...
Just a simple question on NSStrings, I have a piece of code that assigns a value to a string, depending on what is found it is either assigned a value by substringToIndex or the constant string @"0.00", is it okay to use // Save if value found, otherwise set to 0.00 if (parsedCharacters == nil || [parsedCharacters isEqualToString:@""]) ...
In Apple's example code, the method tableView:cellForRowAtIndexPath: of a UITableViewDataSource returns a cell with a retain count of 1; it allocs it, but doesn't autorelease it. However, the static analyzer complains that this violates the Cocoa naming conventions, since the method name doesn't start with 'new', etc. The documentation d...
I was trying to track a strage memory allocation bug so I overrode the retain and release methods of my class. I noticed that when assigning an instance of this class to a property of another, the retain count of the object increased, but my redefined retain was never called. How can this be possible? Are (retain) properties retaining t...
i create a c array in the firstClass (this is created in the interface): BOOL taken[25]; i then go to a different view and come back to the first one, except my c array is reset to 0, how do i retain my array when i go back an forth between views? ...
I need a way to create variables that are accessible for the entire time my custom class is initiated to when I call the release function. I need to retain a NSDate and a NSString. ...