BOOL设置不正确，调试输出令人困惑 [英] BOOL not setting correctly, debug output is confusing

问题描述

我正在尝试在Xcode中设置BOOL，出于某种原因，它显然是拒绝工作的.没有其他设置此布尔值，仅此一个实例.我的代码如下:

I am trying to set a BOOL within Xcode and for some reason it is plain refusing to work. Nothing else is setting this bool, just this one instance. My code is below:

.h

@interface SuspectsViewController : UIViewController 
{
    BOOL boolContentChanged;
}

@property (nonatomic) BOOL boolContentChanged;

.m

@synthesize boolContentChanged;

-(IBAction)buttonPressed:(id)sender
{
    boolContentChanged = true;
}

我也尝试过使用self.boolContentChanged，但是也没有任何反应.为了尝试调试此问题，我使用了po boolContentChanged并获取以下输出，第一个po在boolContentChanged = true之前，第二个在poolContentChanged = true之前.

I have also tried using self.boolContentChanged but nothing happens either. To try and debug this I used po boolContentChanged and get the following output, the first po is before boolContentChanged = true and the second is after.

(lldb) po boolContentChanged
(BOOL) $4 = '\0' <nil>
(lldb) po boolContentChanged
(BOOL) $7 = '\0' <nil>

$是表示它指向某个地址，还是纯粹用于调试参考?

Does the $ indicate that it's pointing to a certain address, or is that purely for debugging reference?

还有，这有什么理由吗?当然，如果它是布尔值而不是指针，则不需要隐式设置吗?

Also, is there any reason this would be nil? Surely it doesn't need implicitly setting if it is a bool and not a pointer?

由于我无法解决任何对此的建议， 提前致谢， 埃利奥特

Any advice on this is much appreciated as I can't work it out, Thanks in advanced, Elliott

推荐答案

我终于设法弄清了正在发生的事情.关于调试器，确实使用YES/NO而不是true/false做出了实际的改变，如果我使用p来显式找到它们，则仍会设置这些值，但是当使用YES/NO时，它们会自动显示.因此，在某些情况下似乎无法再次更新智能感知.

I finally managed to figure out what was happening. In regards to the debugger it did make a practical difference using YES / NO as opposed to true / false, the values were still being set if I used p to explicitly find them, but when using YES / NO they would show automatically. So once again it seems to be the intellisense that is failing to update in certain situations.

感谢大家的帮助.

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