Question

// ClassA.m
NSString *strA = [[NSstring alloc] initWithString:@"test string"];
ClassB *classB = [[ClassB alloc] init];

[classB setStrB:strA];
[strA release];
// classB will be released later

---

// ClassB.h
@property (nonatomic, retain) NSString *strB;

// ClassB.m

// custom setter
-(void) setStrB:(NSString *)newStr {
    strB = newStr;
}

Will strB leak? Should it be released in ClassB dealloc method?

Answer 1

Yes you have to add a release in the ClassB dealloc cause you make a retain on strB in the setter.

Object “strB” life :

• NSString *strA = [[NSstring alloc] initWithString:@”test string”]; -> +1
• [classB setStrB:strA]; -> +1
• [strA release]; -> -1