鲜为人知的事实:现在可以在Xcode中,在调试器中暂停时,内省通知中心,了解注册了哪些对象以接收通知:
(lldb) po NotificationCenter.default
<NSNotificationCenter:0x6040000d40b0>
Name, Object, Observer, Options
com.apple.accessibility.reduce.motion.status, 0x10b126190, 0x7fc795700140, 1001
com.apple.accessibility.asst.scanner.status, 0x10b126190, 0x7fc795700140, 1001
// ... etc. ...
非常好,但是如何从内存地址0x7fc795700140
到学习什么对象呢?
编辑我在这里留下这个问题,但我认为正确答案是在LLDB (Swift): Casting Raw Address into Usable Type上显示的那种东西
po
适用于地址(至少在Objective-C / Mac环境中)
e.f.:
(lldb)po [NSNotificationCenter defaultCenter]
NSWindowDidResizeNotification,0x7fff9a0e98e0,0x6100001246a0,1400
(ldb)在0x6100001246a0上
ExpandOneView:0x6100001246a0
Swill相当于Phillip的答案是:
(lldb) expr -l objc -O -- 0x7fc795700140
<UIApplication: 0x7fc795700140>