小编Sou*_*ock的帖子

尝试使用以下方法过滤我的Realm数据库时,我总是遇到以下错误NSPredicate:

属性'text'不是'getType'类型对象中的链接

我想过滤我的Realm数据库,只显示其中包含特定文本的项目.这就是我尝试过的:

let realm = try! Realm()
let predicate = NSPredicate(format: "typez.text.filter = 'special'")
let filterThis = realm.objects(Publication).filter(predicate)
print(filterThis)

我的模型类的相关部分是:

class Publication: Object, Mappable {
    dynamic var id: Int = 0
    var typez = List<getType>()
    dynamic var url: String?
}

class getType: Object, Mappable {
    dynamic var text: String = ""
}

我结合Swift代码和第三方库(用Obj-C编写).我有一个带有UISegmentedController的UIViewController,我想在每次推送一个段或再次推送同一段时触发.

在我的Swift代码中,我有以下内容:

override func viewDidLoad() {
        super.viewDidLoad()
        //setup
        items = ["newTab".localized,"topTab".localized,"categoryTab".localized]
        carbonTabSwipeNavigation = CarbonTabSwipeNavigation(items: items as [AnyObject], delegate: self)
        carbonTabSwipeNavigation.insertIntoRootViewController(self)
        self.style()
        self.view.userInteractionEnabled = true


        carbonTabSwipeNavigation.carbonSegmentedControl!.addTarget(self, action: #selector(OverviewFolder.changesMade), forControlEvents: UIControlEvents.ValueChanged)
    }
func changesMade() {
        switch carbonTabSwipeNavigation.carbonSegmentedControl!.selectedSegmentIndex {
        case 0:
            print("tab 1")
        case 1:
            print("tab 2")
        case 2:
            print("tab 3")
        default:
            print("nope")
        }
    }

在库中我添加了以下代码:

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSInteger current = self.selectedSegmentIndex;
    [super touchesEnded:touches withEvent:event];
    if (current == self.selectedSegmentIndex)
        [self sendActionsForControlEvents:UIControlEventValueChanged];
}

所以基本上我想在每次用户按下一个段时触发一个ValueChanged动作(即使它是同一个段).目前,当我按下相同的段时,它会第二次触发,但之后UISegmentController变得无响应(无法再切换段).