Question

假设我有以下情况：

- (void)someFunction:(id)param {

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSObject *objectA = [[NSObject alloc] init];
    [objectA doStuff];  // Don't need to release objectA because of the pool

    if (!someValue) {
        [pool release];   // Doubt here
        return;
    }

    NSObject *objectB = [[NSObject alloc] init];
    [objectB doStuff];  // Don't need to release objectB because of the pool

    [pool release];
}

以这种方式从池区内返回是否正确？

Answer 1

简答：是的。

答案很长：在没有显式释放的情况下放弃的池在它所嵌套的自动释放池（通常是当前线程的顶级自动释放池）被释放时被释放。

是的，这是错误的：

NSObject *objectA = [[NSObject alloc] init];
[objectA doStuff];  // Don't need to release objectA because of the pool

您仍然必须明确地释放已分配的对象：

NSObject *objectA = [[NSObject alloc] init];
[objectA doStuff];
[objectA release];

或将它们添加到自动释放池：


NSObject *objectA = [[[NSObject alloc] init] autorelease];
[objectA doStuff];

nsautoreleasepool范围内的return语句

1 个答案: