Hi all,
I have gone through the Memory Management Programming Guide document last
night, and modify my codes a little bit.
Even the program runs well without crashing, but I still have some questions
remained. I will attach some of my codes as
follow:
1. I have both Controller Object and MyModel Object defined in my interface
builder. I also make a connection between them.
- some codes of Controller interface file:
@interface Controller : NSObject {
IBOutlet UIButton *beginButton;
IBOutlet UIButton *endButton;
IBOutlet UILabel *nameLabel;
IBOutlet UILabel *numberLabel;
MyModel *myModel;
}
@property (nonatomic, retain) IBOutlet MyModel *myModel;
/* some methods defined here as well */
@end
- some codes of Controller implementation file:
#import "Controller.h"
@implementation Controller
@synthesize myModel;
- (void) awakeFromNib {
/*initialize some UI here */
NSLog(@"myModel retain count: %d", [myModel retainCount]);
NSLog(@"controller retain count: %d", [self retainCount]);
}
/* some IBAction method defined here */
- (void) dealloc {
NSLog(@"Controller dealloc method invoked!"); // dealloc checkpoint 1
[myModel release];
myModel = nil;
[super dealloc];
}
2. I have implemented the Model object as follow:
- some codes of MyModel interface file:
@interface MyModel : NSObject {
int number;
NSDictionary * modelNames;
}
@property int number;
- (id) initWithNumber:(int)numValue;
- (void) initModelNames;
/* some other methods defined here */
@end
- some codes of MyModel implementation file:
@implementation MyModel
@synthesize number;
- (id) init {
return [self initWithNumber:5];
}
- (id) initWithNumber(int)numValue {
if (self = [super init]) {
self.number = numValue;
[self initModelNames];
}
return [self autorelease];
}
- (void) initModelNames {
/* setup two NSArray: strNames, strKeys */
modelNames = [[NSDictionary dictionaryWithObjects:strNames
forKeys:strKeys] retain];
}
- (void) dealloc {
[modelNames release];
modelNames = nil;
[super dealloc];
NSLog(@"MyModel dealloc method invoked!"); //dealloc checkpoint 2
}
I have two questions:
1. Look at the awakeFromNib method of Controller, my output of the retain
count to the console are
myModel retain count: 5
controller retain count: 17
both number are very surprised me, why is that? I suppose they should be 2
or 1?
Can anyone explain please?
2. No matter wether I quit the program from my iPhone simulator or I quit
the simulaor, none of the
dealloc method is invoked because there is no any NSLog output from the
deallocmethod to the console.
Why? I know this probably can be solved if I have the retain count as I
expected.
best regards
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