addSubview增量保留计数？ [英] does addSubview increment retain count?

问题描述

我已经测试了它，看起来确实如此。所以我的问题是，它是否总是增加保留计数。

I've tested it and it looks like it does. So my question is, does it ALWAYS increment the retain count.

所以每次我做这样的事情：

So everytime I do something like this:

UIView *theView = [[[UIView alloc] initWithFrame:(CGRect)aFrame] autorelease];
[self.view addSubview:theView];

我实际上是在泄漏内存吗？

Am I actually leaking memory?

<删除>我有一个全局属性 @属性（非原子，保留）的UILabel * ingredientsTextLabel; 我在 viewDidLoad中实例化使用此代码：

I have a global property @property (nonatomic, retain) UILabel *ingredientsTextLabel; which I instantiate in viewDidLoad with this code:

我只有名为的属性，我的标题中没有属性，所以没有getter和setter。在我 viewDidLoad中：

I just have the property named, theres no property for it in my header, so no getter and setter. In my viewDidLoad:

    ingredientsTextLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, ingredientsScrollView.frame.size.width, ingredientsScrollView.frame.size.height)];
    [ingredientsTextLabel setBackgroundColor:[UIColor clearColor]];
    [ingredientsTextLabel setFont:[UIFont fontWithName:@"Helvetica" size:18]];
    [ingredientsTextLabel setText:ingredientsText];
    [ingredientsTextLabel setNumberOfLines:0];
    [ingredientsTextLabel setLineBreakMode:UILineBreakModeWordWrap];
    NSLog(@"%i",[ingredientsTextLabel retainCount]); // here retain count is 1

    CGSize maxSize = CGSizeMake(ingredientsScrollView.frame.size.width, 9999);
    CGSize ingLabSize = [ingredientsText sizeWithFont:ingredientsTextLabel.font
                                    constrainedToSize:maxSize
                                        lineBreakMode:ingredientsTextLabel.lineBreakMode];

    [ingredientsTextLabel setFrame:CGRectMake(ingredientsTextLabel.frame.origin.x, ingredientsTextLabel.frame.origin.x, ingredientsTextLabel.frame.size.width, ingLabSize.height)];
    [ingredientsScrollView addSubview:ingredientsTextLabel];
    NSLog(@"%i",[ingredientsTextLabel retainCount]); // here retain count is 2!

现在我认为这样可行，然后在dealloc中我可以发布 ingredientsTextLabel ，但保留计数是2，所以在addSubview 以及之后我还需要释放i吗？我没有意识到这种情况发生了！ ：（

Now I thought this would work and then in dealloc I can release ingredientsTextLabel, but the retain count is 2, so do I need to also release i after I addSubview as well? I didn't realise this happens! :(

推荐答案

是的，addSubview增加了保留计数。这是有道理的，因为该方法存储了不应该是的子视图释放/释放直到superview也被释放。当superview发布时，它还会释放它的所有子视图。

Yes, "addSubview" increases the retain count. This makes sense because the method stores the subview which should not be released/freed until the superview is also released. When the superview is release it also releases all its subviews.

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