objective-c – 如何检查目标c对象？

我自己不是Ruby人,但如果我理解正确的话.在Ruby中,我会打印一个对象的所有实例变量.这不是Cocoa内置的东西.如果需要,可以使用运行时系统查询此信息.

这是我放在一起的快速类别：

#import <objc/objc-class.h>

@interface NSObject (InspectAsInRuby)

- (Nsstring *) inspect;

@end

@implementation  NSObject (InspectAsInRuby)

- (Nsstring *) inspect;
{
    NSMutableString *result = [NSMutableString stringWithFormat: @"<%@:%p",NsstringFromClass( [self class] ),self ];

    unsigned ivarCount = 0;
    Ivar *ivarList = class_copyIvarList( [self class],&ivarCount );

    for (unsigned i = 0; i < ivarCount; i++) {
        Nsstring *varName = [Nsstring stringWithUTF8String: ivar_getName( ivarList[i] )];
        [result appendFormat: @" %@=%@",varName,[self valueForKey: varName]];
    }

    [result appendString: @">"];

    free( ivarList );

    return result;
}

@end