以PHAsset為例子

for (PHAsset *asset inself.assetsFetchResults) {
    unsigned int count;
    // 獲取屬性列表
    objc_property_t *propertyList = class_copyPropertyList([asset class], &count);
    for (unsigned int i = 0; i<count; i++) {
        const char *propertyName = property_getName(propertyList[i]);
        NSLog(@"property----="">%@", [NSString stringWithUTF8String:propertyName]);
    }   
}