In Xcode 4, when I use the debugger to print an NSArray count, it would show in the console like this:
在Xcode 4中，当我使用调试器打印NSArray计数时，它会在控制台显示如下:
po [self.array count]
3
In Xcode 5, doing this gives me
在Xcode 5中，这样做给了我。
[no Objective-C description available]
This seems to be the case with all numerical types. What is the change or reasoning behind this behavior?
这似乎是所有数值类型的情况。这种行为背后的原因是什么?
2 个解决方案
#1
41
The command po stands for "Print Object". self.array.count is type NSUInteger which is not an object. Use the p command instead, which is intended to print non object values. E.g.
命令po代表“打印对象”。self.array。count是NSUInteger类型，它不是一个对象。相反，使用p命令来打印非对象值。如。
p self.array.count
The LLDB docs are a great resource.
LLDB文档是一个很好的资源。
#2
2
In the meantime, I found that if you enclose any numerical type into an NSNumber, it would print out in the console like this:
与此同时，我发现如果将任何数值类型封装到一个NSNumber中，它会像这样在控制台打印出来:
int index = 1;
po index
[no Objective-C description available]
po @(index)
1
po @([self.array count])
3
#1
41
The command po stands for "Print Object". self.array.count is type NSUInteger which is not an object. Use the p command instead, which is intended to print non object values. E.g.
命令po代表“打印对象”。self.array。count是NSUInteger类型，它不是一个对象。相反，使用p命令来打印非对象值。如。
p self.array.count
The LLDB docs are a great resource.
LLDB文档是一个很好的资源。
#2
2
In the meantime, I found that if you enclose any numerical type into an NSNumber, it would print out in the console like this:
与此同时，我发现如果将任何数值类型封装到一个NSNumber中，它会像这样在控制台打印出来:
int index = 1;
po index
[no Objective-C description available]
po @(index)
1
po @([self.array count])
3