ios/objective-c:将自定义对象的nsarray转换为json

就像你说的, NSJSONSerialization 只理解字典和数组。您必须在自定义类中提供一个将其属性转换为字典的方法,如下所示:

@interface Offers 
@property NSString* title;
-(NSDictionary*) toJSON;
@end

@implementation Offers
-(NSDictionary*) toJSON {
    return @{
       @"title": self.title
    };
}
@end

然后您可以将代码更改为

NSArray <Offers *> *offers = [self getOffers:self.customer];
NSMutableArray<NSDictionary*> *jsonOffers = [NSMutableArray array];
for (Offers* offer in offers) {
    [jsonOffers addObject:[offer toJSON]];
}
NSError *error;
//Following line crashes
NSData * JSONData = [NSJSONSerialization dataWithJSONObject:jsonOffers
                                                    options:kNilOptions
                                                      error:&error];