如何在swift 4中刷新集合视图中的数据

Question

我有一个功能，每2秒刷新一次数组的数据

var timer = Timer()
func timeRefresh(){
timer = Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(ViewController.refreshData), userInfo: nil, repeats: true)
}

我从售后接收数据

@objc func refreshData(){
post(postString, Route) { (res) in
let success = res["success"]
if success == true {
let walkers = res["walkers"]
for secondItem in walkers.array! {
let duration = secondItem["duration"]
self.timeCar.append(duration.stringValue) //this is the info that i need for the collection view
}
}
print("array time (self.timeCar)")
}else{
self.timeCar = ["-.-","-.-","-.-","-.-","-.-"]
}
}
}

我需要每秒钟刷新一次收藏视图

cell.typeLabel.text = timeCar[indexPath.row]

Answer 1

UICollectionView有多种重新加载数据的方法。

如果希望重新加载每个单元格：CCD_ 2。

如果要重新加载特定节：collectionView.reloadSections(<Array of Sections>)。

如果要重新加载特定单元格：collectionView.reloadItems(<Array of IndexPaths>)。