如何在objective c中将自定义类转换为json数组或json字典？

@interface CustomClass : NSObject <NSCoding>
@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) NSInteger age;
@end

@implementation CustomClass

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super init];
    if (self) {
        self.name = [aDecoder decodeObjectForKey:@"name"];
        self.age = [aDecoder decodeIntegerForKey:@"age"];
    }
    return self;
}

- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeObject:self.name forKey:@"name"];
    [aCoder encodeInteger:self.age forKey:@"age"];
}

@end

CustomClass *customObject = [[CustomClass alloc] init];
customObject.name = @"John";
customObject.age = 25;

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:[customObject dictionaryRepresentation] options:NSJSONWritingPrettyPrinted error:&error];
if (!jsonData) {
    NSLog(@"转换为JSON数据时出错：%@", error);
} else {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    NSLog(@"转换后的JSON数据：%@", jsonString);
}

NSString *jsonString = @"{\"name\":\"John\",\"age\":25}";
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
if (!jsonDict) {
    NSLog(@"转换为JSON字典时出错：%@", error);
} else {
    CustomClass *customObject = [[CustomClass alloc] init];
    customObject.name = jsonDict[@"name"];
    customObject.age = [jsonDict[@"age"] integerValue];
    NSLog(@"转换后的自定义类：%@", customObject);
}