Swift替代performSelectorOnMainThread [英] Swift alternative to performSelectorOnMainThread

问题描述

我想在此方法中的块内重新加载我的表数据：

I want to reload my table data inside a block in this method:

import UIKit
import AssetsLibrary

class AlbumsTableViewController: UITableViewController {

    var albums:ALAssetsGroup[] = []

    func loadAlbums(){
        let library = IAAssetsLibraryDefaultInstance

        library.enumerateGroupsWithTypes(ALAssetsGroupType(ALAssetsGroupAll),
            usingBlock: {(group, stop) in
                if group {
                    self.albums.append(group)
                }
                else {
                    dispatch_async(dispatch_get_main_queue(), {

                        self.tableView.reloadData()

                    })
                }
            }, failureBlock: { (error:NSError!) in println("Problem loading albums: \(error)") })

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        loadAlbums()

        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        //self.navigationItem.rightBarButtonItem = self.editButtonItem
    }

但是else块不会执行。我得到的错误是：

But the else block will not execute. The error I get is:

'performSelectorOnMainThread' is unavailable: 'performSelector' methods are unavailable

那么在swift中替代'performSelectorOnMainThread'是什么？

So what is the alternative to 'performSelectorOnMainThread' in swift?

更新：

我现在收到中止错误。以下是控制台的外观： http://cl.ly/image/3D0h1x433P0R

I am now getting an abort error. Here is what the console looks like: http://cl.ly/image/3D0h1x433P0R

推荐答案

这个简单的C函数：

dispatch_async(dispatch_get_main_queue(), {

        // DO SOMETHING ON THE MAINTHREAD
        self.tableView.reloadData()
        })

如何启动你的功能：

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {

        loadAlbums()

})

$ b viewDidLoad（）中的$ b

？

in viewDidLoad()?

这篇关于Swift替代performSelectorOnMainThread的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！