IOS 自定义model如果要转换位json与服务器进行交互的时候，我把model数据类型先转换为了dictionary然后在进行json序列化。

 

#import <objc/runtime.h>

@implementation ConvertToCustomClass
+ (NSMutableArray *)convertCustomClassToDictionary:(NSMutableArray *)array{
    NSMutableArray *customArray = [NSMutableArray array];
    for (id customClass in array) {
        NSString *className = NSStringFromClass([customClass class]);//获取类名
        const char *cClassName = [className UTF8String];//类名编码方式
        id theClass = objc_getClass(cClassName);//获取当前类类型
        unsigned int outCount, i;
     
        //获取该类的所有属性
        objc_property_t *properties = class_copyPropertyList(theClass, &outCount);
        NSMutableArray *propertyNames = [[NSMutableArray alloc] initWithCapacity:1];
        for (i = 0; i < outCount; i++) {
            objc_property_t property = properties[i];
             //property_getName()返回属性的名字
            NSString *propertyNameString = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
            [propertyNames addObject:propertyNameString];
            //property_getAttributes()返回属性的属性
            NSLog(@"%s %s\n", property_getName(property), property_getAttributes(property));
        }
        NSMutableDictionary *finalDict = [[NSMutableDictionary alloc] initWithCapacity:1];
        for(NSString *key in propertyNames)
        {
            SEL mySel = NSSelectorFromString(key);
            id value = http://www.mamicode.com/[customClass performSelector:mySel];
            if (value =http://www.mamicode.com/= nil)
            {
                value = http://www.mamicode.com/[NSNull null];
            }
            [finalDict setObject:value forKey:key];
            NSLog(@"%@     %@\n", value, key);
        }
        [customArray addObject:finalDict];
    }
    return customArray;

}

@end