IOS property

@interface TextObjectViewController : UIViewController {Foo *obj1;Foo *obj2;Foo *obj3;}@property(retain, nonatomic) Foo *obj1;@property(copy, nonatomic) Foo *obj2;@property(retain, nonatomic) Foo *obj3;@end@implementation TextObjectViewController@synthesize obj1, obj2, obj3;- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { obj1 = [[Foo alloc] init];self.obj2 = [[Foo alloc] init]; } return self;}-(void)setObj1:(Foo *)obj{NSLog(@"call setObj1 function.");obj1 = [[Foo alloc] init];} // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.- (void)viewDidLoad { [super viewDidLoad];NSLog(@"obj1 retainCount : %d" , [obj1 retainCount]); //NSLog(@"obj2 retainCount : %d" , [obj2 retainCount]);NSLog(@"obj3 retainCount : %d" , [obj3 retainCount]);}@end 

 

结果:

 

p.p1 {margin: 0.0px 0.0px 0.0px 28.0px; text-indent: -28.0px; font: 11.0px Menlo}

2011-06-03 23:17:37.082 CocoaSample[3656:207] obj1 retainCount : 1

2011-06-03 23:17:37.085 CocoaSample[3656:207] obj2 retainCount : 1

2011-06-03 23:17:37.091 CocoaSample[3656:207] obj3 retainCount : 2