为什么在分配保留属性时不应该释放？
这个问题与这个问题相关，但更简单。 [我想我可能已经接近结束这些愚蠢的问题了，可以开始讨论严肃的事情了:)]。
我有一个 retain 属性并像这样设置它：
UINavigationController *thing = [[UINavigationController alloc] initWithRootViewController:one];
// thing's retain count is one
navController = thing;
// thing's retain count is still one!
[thing release];
// now retain count is zero, which is wrong
我无法理解为什么保留计数为零。 navController 定义为
@property (nonatomic, retain) UINavigationController *navController;
该属性不应该将保留计数增加一吗？
This question is related to this one, but simpler. [I think I may be close to the end of these dumb questions and can get down to serious business :)].
I have a retain property and set to it like this:
UINavigationController *thing = [[UINavigationController alloc] initWithRootViewController:one];
// thing's retain count is one
navController = thing;
// thing's retain count is still one!
[thing release];
// now retain count is zero, which is wrong
I cannot understand why the retain count gets to zero. navController is defined as
@property (nonatomic, retain) UINavigationController *navController;
Shouldn't the property increase the retain count by one?
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问题是：您直接分配给属性的基础实例变量，而不是调用设置器。属性魔法不是这样触发的。尝试
改为（其余代码无需更改）。
The problem is: you are assigning directly to the property's underlying instance variable instead of calling the setter. The property magic is not triggered this way. Try
instead (remaining code needs no change).