Gracefully output Arrays/Dictionaries that contain Unicode encoded strings. (may not work very well)

Better_NSLog.m

//
//  Better_NSLog.m
//
//  Created by Makito on 2017/12/17.
//  Copyright © 2017年 Makito. All rights reserved.
//

#import <Foundation/Foundation.h>
#define INDENT @"  "

@interface Helper : NSObject
+ (NSString*)printNSArray:(NSArray*)array indent:(int)level;
+ (NSString*)printNSDictionary:(NSDictionary*)dict indent:(int)level;
@end

@implementation Helper
+ (NSString*)printNSArray:(NSArray*)array indent:(int)level{
    NSMutableString *indent_ = [NSMutableString string];
    for(int i=0; i<level; i++){
        [indent_ appendString:INDENT];
    }
    NSMutableString *formatted = [NSMutableString string];
    [formatted appendString:indent_];
    [formatted appendString:@"[\n"];
    for (NSObject* el in array) {
        if([el isKindOfClass:[NSArray class]]){
            [formatted appendString:[Helper printNSArray:(NSArray*)el indent:level+1]];
        } else if([el isKindOfClass:[NSDictionary class]]){
            [formatted appendString:[Helper printNSDictionary:(NSDictionary*)el indent:level+1]];
        } else {
            NSMutableString *line = [NSMutableString string];
            [line appendString:indent_];
            [line appendString:INDENT];
            [line appendString:@"\""];
            [line appendString: [NSString stringWithFormat:@"%@", el]];
            [line appendString:@"\",\n"];
            [formatted appendString:line];
        }
    }
    [formatted appendString:indent_];
    [formatted appendString:@"]\n"];
    return formatted;
}

+ (NSString*)printNSDictionary:(NSDictionary*)dict indent:(int)level{
    NSMutableString *indent_ = [NSMutableString string];
    for(int i=0; i<level; i++){
        [indent_ appendString:INDENT];
    }
    NSMutableString *formatted = [NSMutableString string];
    [formatted appendString:indent_];
    [formatted appendString:@"{\n"];
    for (id key in dict) {
        NSObject *el = [dict objectForKey:key];
        if([el isKindOfClass:[NSArray class]]){
            [formatted appendString:[Helper printNSArray:(NSArray*)el indent:level+1]];
        } else if([el isKindOfClass:[NSDictionary class]]){
            [formatted appendString:[Helper printNSDictionary:(NSDictionary*)el indent:level+1]];
        } else {
            NSMutableString *line = [NSMutableString string];
            [line appendString:indent_];
            [line appendString:INDENT];
            [line appendString: @"\""];
            [line appendString: key];
            [line appendString: @"\": \""];
            [line appendString: [NSString stringWithFormat:@"%@", el]];
            [line appendString: @"\",\n"];
            [formatted appendString:line];
        }
    }
    [formatted appendString:indent_];
    [formatted appendString:@"}\n"];
    return formatted;
}
@end

int main(int argc, const char * argv[]) {
    
    @autoreleasepool {
        NSDictionary *dict1 = [[NSDictionary alloc]initWithObjectsAndKeys:@"黑色高級車", @"Key1", @"A frank dude in ASCII.", @"Key2", nil];
        NSDictionary *dict2 = [[NSDictionary alloc]initWithObjectsAndKeys:@"雷電牙醫", @"Key3", dict1, @"Key4", nil];
        NSArray *arr = [[NSArray alloc] initWithObjects:@"华莱士 sells 唐揚げ", dict2, nil];
        // First "\n" is only intended to skip the ugly line that contains the log header
        NSLog(@"\n%@", [Helper printNSArray:arr indent:0]);
    }
    return 0;
}