我想在这个方法中重新加载一个块中的表数据：
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：
'performSelectorOnMainThread' is unavailable: 'performSelector' methods are unavailable
那么swift中“performSelectorOnMainThread”的替代方法是什么？
更新：
我现在得到一个中止错误。这是控制台的样子：http://cl.ly/image/3D0h1x433P0R
这个简单的C函数：
dispatch_async(dispatch_get_main_queue(),{
// DO SOMETHING ON THE MAINTHREAD
self.tableView.reloadData()
})
如何启动您的功能：
dispatch_async(dispatch_get_global_queue(disPATCH_QUEUE_PRIORITY_DEFAULT,0),{
loadAlbums()
})
在viewDidLoad()？