iOS反射机制，获取方法名和描述属性

最新推荐文章于 2020-08-20 16:22:46 发布

转载最新推荐文章于 2020-08-20 16:22:46 发布 · 828 阅读

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本文介绍了一个Objective-C中实现的对象序列化方法。该方法通过获取对象的所有属性名称，并使用这些属性构建一个字典，最终将字典转换为JSON字符串来完成序列化过程。

- (NSString *)serializeObject:(id)theObject
{
    NSString *className = NSStringFromClass([theObject class]);
    
    
    const char *cClassName = [className UTF8String];
    
    id theClass = objc_getClass(cClassName);
    
    
    unsigned int outCount, i;
    
//    Method *methods = class_copyMethodList(theClass, &outCount);
//    for (i = 0; i < outCount; i++) {
//        
//        
//        Method method = methods[i];
//        
//        SEL sel = method_getName(method);
//        
//        NSLog(@"%@",NSStringFromSelector(sel));
//        
//        
//    }
    
    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];
        
        
        NSString *propertyNameString = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
        
        
        [propertyNames addObject:propertyNameString];
        
        
//        [propertyNameString release];
        
        
        NSLog(@"%s %s\n", property_getName(property), property_getAttributes(property));
        
        
    }
    
    
    NSMutableDictionary *finalDict = [[NSMutableDictionary alloc] initWithCapacity:1];
    
    
    for(NSString *key in propertyNames)
    {
        SEL selector = NSSelectorFromString(key);
        id value = [theObject performSelector:selector];
        
        
        if (value == nil)
        {
            value = [NSNull null];
        }
        
        
        [finalDict setObject:value forKey:key];
    }
    
    
//    [propertyNames release];
    
    
//    NSString *retString = [[CJSONSerializer serializer] serializeDictionary:finalDict];
    NSString *retString = [[NSString alloc] initWithData:[NSJSONSerialization dataWithJSONObject:finalDict options:0 error:nil] encoding:NSUTF8StringEncoding];
    
//    [finalDict release];
    
    
    return retString;
    
}