嗯，就是内存方面的

iteye_9729

于 2011-08-18 09:59:56 发布

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UIScrollView* scroll = [[UIScrollView alloc] init];

    NSLog(@"scroll retain count 1 is %d", [scroll retainCount]);

    ControlPanel* cp = [[ControlPanel alloc] init];

    NSLog(@"control panel retain count 1 is %d", [cp retainCount]);

    [scroll addSubview:cp];

    NSLog(@"control panel retain count 2 is %d", [cp retainCount]);

    NSLog(@"scroll retain count 2 is %d", [scroll retainCount]);

    [scroll release];
    NSLog(@"control panel retain count 3 is %d", [cp retainCount]);
    NSLog(@"scroll retain count 3 is %d", [scroll retainCount]);

    [cp release];

    return NO;

2011-08-18 09:57:25.352 wolaidianDemo[3280:607] scroll retain count 1 is 1
2011-08-18 09:57:33.784 wolaidianDemo[3280:607] control panel retain count 1 is 1
2011-08-18 09:57:38.320 wolaidianDemo[3280:607] control panel retain count 2 is 2
2011-08-18 09:57:41.218 wolaidianDemo[3280:607] scroll retain count 2 is 1
2011-08-18 09:57:44.414 wolaidianDemo[3280:607] control panel retain count 3 is 1