如何将对象的属性打印到 Xcode 中的调试器控制台？
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How do I print an object's property to the Debugger Console in Xcode?
提问by Senseful
I have an object that was created with the Core Data code generator:
我有一个使用 Core Data 代码生成器创建的对象：
.h file:
.h 文件：
@interface MyObject : NSManagedObject
{
}
@property (nonatomic, retain) NSString * title;
@end
.m file:
.m 文件：
@implementation MyObject
@dynamic title;
@end
I put a breakpoint and now I want to print the titleproperty of one of its instances (myObject) to the console.
我放置了一个断点，现在我想将title其中一个实例 ( myObject)的属性打印到控制台。
When I try po myObject.title, I get the error:
当我尝试时po myObject.title，出现错误：
There is no member named title.
没有名为 title 的成员。
When I try po [myObject title], I get the error:
当我尝试时po [myObject title]，出现错误：
Target does not respond to this message selector.
Target 不响应此消息选择器。
When I try myObject.titlein the Expressions window, I get the error:
当我myObject.title在“表达式”窗口中尝试时，出现错误：
out of scope
超出范围
... even though myObjectin the same window allows me to see some of its members.
...即使myObject在同一个窗口中允许我看到它的一些成员。
How can I print an object's property to the console and/or Expressions window in Xcode?
如何将对象的属性打印到 Xcode 中的控制台和/或表达式窗口？
回答by Jonathan del Strother
You can get around this by using valueForKey -
你可以通过使用 valueForKey 来解决这个问题 -
po [myObject valueForKey:@"title"]
which gets tiresome pretty quickly, but works ok.
这很快就会让人厌烦，但工作正常。
