iphone - 为什么executeFetchRequest是:fetchRequest leaking memory?

Question

Instruments 显示以下代码泄漏，如果我注释掉这段代码就没有泄漏。

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

    // Edit the entity name as appropriate.

    NSEntityDescription *entity = [NSEntityDescription entityForName:USER_CORE_DATA inManagedObjectContext:self.managedObjectContext];

    [fetchRequest setEntity:entity];

    NSPredicate *predicte = [NSPredicate predicateWithFormat:@"username == %@", [[User defaultManager] savedUsername]];
    [fetchRequest setPredicate:predicte];

    // set any predicates or sort descriptors, etc.

    // execute the request
    [self.managedObjectContext executeFetchRequest:fetchRequest onSuccess:^(NSArray *results) {

    } onFailure:^(NSError *error) {

        NSLog(@"Error fetching: %@", error);

    }];
    [fetchRequest release];

特别是 instruments 在上面的代码中说了这一行:

[self.managedObjectContext executeFetchRequest:fetchRequest onSuccess:^(NSArray *results)

这似乎是 fetchRequest 和/或 block 的泄漏。任何帮助将不胜感激，并提前致谢。

Answer 1

看起来 executeFetchRequest:onSuccess:onFailure: 是您在 NSManagedObjectContext 类别中定义的函数。确保您传递给 onSuccess block 的 NSArray 对象实例是自动释放的。