Strong and weak event.NSString

Asked Nov 08 '15 at 10:25

Active Nov 08 '15 at 10:30

Viewed 30 times

Code:

- (void)viewDidLoad{
[super viewDidLoad];
NSString* string = @"aSrting";
self.weakString = string;
NSLog(@"string: %@,%p",string,string);
NSLog(@"weakString: %@,%p",self.weakString,self.weakString);}

-(void)viewWillAppear:(BOOL)animated{
NSLog(@"weakString: %@,%p",self.weakString,self.weakString);}
- (void)viewDidAppear:(BOOL)animated{
NSLog(@"weakString: %@,%p",self.weakString,self.weakString);}

Result:

2015-11-08 18:17:06.022 HZStrongWeakTest[4514:370204] string: aSrting,0x101b33088
2015-11-08 18:17:06.023 HZStrongWeakTest[4514:370204] weakString: aSrting,0x101b33088
2015-11-08 18:17:06.023 HZStrongWeakTest[4514:370204] weakString: aSrting,0x101b33088
2015-11-08 18:17:06.026 HZStrongWeakTest[4514:370204] weakString: aSrting,0x101b33088

Q: the 'aString' isn't release. 'weakString' isn't hold the object. how do it work?

edited Nov 08 '15 at 10:30

Evaldas Buinauskas

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asked Nov 08 '15 at 10:25

nianran

1

How is `weakString` defined? – Avi Nov 08 '15 at 10:28
@property (nonatomic, weak) NSString* weakString; //define – nianran Nov 08 '15 at 10:32
//@interface ViewController ()//@property (nonatomic, weak) NSString* weakString; //@end – nianran Nov 08 '15 at 10:33
See "NSString literals memory management" to figure it out – imnosov Nov 08 '15 at 11:05

Strong and weak event.NSString

0 Answers0