Print all properties value of any custom Object

Very helpful Objective-C method if you're debugging your iPhone, iPad or iPod app.
It writes out all the properties of a custom NSObject!


/** Get a printable string of all properties of an object.

 Based on: http://zearfoss.wordpress.com/2011/04/14/objective-c-quickie-printing-all-declared-properties-of-an-object/

 @param obj The object to analyze.
 @return Returns a ready-for-print string containing all property values.

 */
+ (NSString *)printPropertiesForObject:(id)obj {

    NSMutableString *str = [[NSMutableString alloc] init];
    NSUInteger count;
    objc_property_t *properties = class_copyPropertyList([obj class], &count);

    for (NSUInteger i=0; i<count; i++) {
        NSString *selector = [NSString stringWithCString:property_getName(properties[i]) encoding:NSUTF8StringEncoding];
        SEL sel = sel_registerName([selector UTF8String]);

        const char *attr = property_getAttributes(properties[i]);
        switch (attr[1]) {
            case '@':
                [str appendString:[NSString stringWithFormat:@"%s : %@\n", property_getName(properties[i]), objc_msgSend(obj, sel)]];
                break;
            case 'i':
                [str appendString:[NSString stringWithFormat:@"%s : %i\n", property_getName(properties[i]), [objc_msgSend(obj, sel) intValue]]];
                break;
            case 'f':
                [str appendString:[NSString stringWithFormat:@"%s : %f\n", property_getName(properties[i]), [objc_msgSend(obj, sel) floatValue]]];
                break;
            default:
                break;
        }
    }

    free(properties);
    return str;
}


Download the ready-for-use source file (.m) of Print all properties value of any custom Object