为什么我不应该释放这个字符串？
看下面的方法：
-(void)updateProfile:(Profile *)profile WithJSON:(NSString *)JSON;
{
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *object = [parser objectWithString:JSON error:nil];
NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
[nf setPositiveFormat:@"#,##0"];
profile.displayName = [object valueForKey:@"displayName"];
profile.profileURL = [object valueForKey:@"profileURL"];
NSString *rep = [object valueForKey:@"reputation"];
profile.reputation = [[nf numberFromString:rep] intValue];
//[rep release]; <-Why not release?
[nf release];
//[object release]; <-Why not release?
[parser release];
}
我注释掉了两行，如果没有的话，这会给我 EXC_BAD_ACCESS。
有人可以向我解释为什么释放这些对象是错误的吗？
Look at the following method:
-(void)updateProfile:(Profile *)profile WithJSON:(NSString *)JSON;
{
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *object = [parser objectWithString:JSON error:nil];
NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
[nf setPositiveFormat:@"#,##0"];
profile.displayName = [object valueForKey:@"displayName"];
profile.profileURL = [object valueForKey:@"profileURL"];
NSString *rep = [object valueForKey:@"reputation"];
profile.reputation = [[nf numberFromString:rep] intValue];
//[rep release]; <-Why not release?
[nf release];
//[object release]; <-Why not release?
[parser release];
}
I have commented out two lines, which gives me EXC_BAD_ACCESS if not.
Can someone explain to me why it's wrong to release these objects?
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评论（2）
您不应该释放它，因为您没有
+alloc、-retain或-copy它。像+objectWith...这样的便捷构造函数返回自动释放的对象。You shouldn't release it because you didn't
+alloc,-retain, or-copyit. Convenience constructors like+objectWith…return autoreleased objects.更好的问题是：为什么应该发布它？您做了什么来声明该对象的所有权？在这种情况下，答案是“什么也没有”。由于您不拥有它，因此您无法很好地释放它。
The better question to ask is: Why should you release it? What have you done to claim ownership over the object? The answer in this case is "nothing." Since you don't own it, you can't very well release it.