NSObject+LogProperties.h

//
//  NSObject+LogProperties.h
//  JWPlayer-SDK-iOS-Demo
//
//  Created by Amitai Blickstein on 6/15/19.
//  Copyright © 2019 JWPlayer. All rights reserved.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface NSObject (LogProperties)
- (NSString*)extractPrettyPropertiesString             NS_SWIFT_NAME(prettyProperties());
- (NSString*)extractAutomationFriendlyPropertiesString NS_SWIFT_NAME(automationFriendlyProperties());
- (void)logProperties;
@end

NS_ASSUME_NONNULL_END

NSObject+LogProperties.m

//
//  NSObject+LogProperties.m
//  JWPlayer-SDK-iOS-Demo
//
//  Created by Amitai Blickstein on 6/15/19.
//  Copyright © 2019 JWPlayer. All rights reserved.
//

#import "NSObject+LogProperties.h"
#import <objc/runtime.h>

@implementation NSObject (logProperties)

+ (NSString*)delimiter {
    return @"^_"; // ASCII 31, control character, the "Unit Separator"
}

- (NSString*)extractAutomationFriendlyPropertiesString {
    return [self extractPropertiesStringPrettified:NO];
}

- (NSString*)extractPrettyPropertiesString {
    return [self extractPropertiesStringPrettified:YES];
}

- (NSString*)extractPropertiesStringPrettified:(BOOL)prettified {
    NSMutableString *result = [NSMutableString stringWithString:@""];
    
    @autoreleasepool {
        unsigned int numberOfProperties = 0;
        objc_property_t *propertyArray = class_copyPropertyList([self class], &numberOfProperties);
        for (NSUInteger i = 0; i < numberOfProperties; i++) {
            objc_property_t property = propertyArray[i];
            NSString *name = [NSString stringWithUTF8String:property_getName(property)];
            if ([self valueForKey:name]) {
                [result appendFormat:@"%@:%@\n", name, [self valueForKey:name]];
            } else {
                [result appendFormat:@"%@:<nil>\n", name];
            }
        }
        
        if (!prettified) {
                // replace newlines with delimiter
            [result replaceOccurrencesOfString:@"[\r\n]"
                                    withString:[NSObject delimiter]
                                       options:NSRegularExpressionSearch
                                         range:NSMakeRange(0, result.length)];
        }
        
        free(propertyArray);
    }
    
    if (result.length == 0) {
        return @" ** No Properties **";
    }
    
    return result.copy;
}

- (void)logProperties {
    NSLog(@"\n----------------------------------------------- Properties for object %@", self);
    NSLog(@"%@", [self extractPrettyPropertiesString]);
    NSLog(@"\n-----------------------------------------------");
}

@end