ios - 使用swift 3将日期显示到tableview单元格时出现索引超出范围错误
<p><p>大家好，我的 tableview 中有一个自定义 <code>UITableViewCell</code>，有 2 个标签和一个 imageview。在第一个标签中，我正在获取通知消息数组，它将在 <strong>第二个标签中运行良好 m 在这种情况下获取日期数组 m 得到错误消息 Index out of Range</strong>。谁能帮助我如何解决它。在此先感谢</p>
<p><strong>这里附上 JSON 响应:</strong> </p>
<pre><code>{
"Notification_Details":
[
{
"student_id": 2,
"date": "2017-06-03T00:00:00",
"message": "Notification Message 3"
},
{
"student_id": 2,
"date": "2017-06-02T00:00:00",
"message": "Notification Message 2"
},
{
"student_id": 2,
"date": "2017-06-01T00:00:00",
"message": "Notification Message 1"
}
]
}
</code></pre>
<p>下面是代码 m 用于获取 json 并加载到 tableview 单元格中。 </p>
<pre><code>import UIKit
class NotificationsViewController: UIViewController,UITableViewDataSource,UITableViewDelegate
{
@IBOutlet weak var mytable: UITableView!
var notilabell : Array = ()
var datelabel : Array = ()
override func viewDidLoad() {
super.viewDidLoad()
self.getnotiJSON()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return notilabell.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! NotiCellTableViewCell
cell.noti.text = notilabell
cell.datenotification.text = datelabel
return cell
}
func getnotiJSON()
{
let url = NSURL(string: "http://ezschoolportalapi.azurewebsites.net/api/Student/NotificationDetails?schoolid=1&studentid=2")
let request = NSMutableURLRequest(url: url! as URL)
let task = URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error)
in
guard error == nil && data != nil else
{
print("Error:",error)
return
}
let httpstatus = response as? HTTPURLResponse
if httpstatus?.statusCode == 200
{
if data?.count != 0
{
let responseString = try! JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary
let notiarray = responseString?.value(forKey: "Notification_Details") as? NSArray
for notifi in notiarray!
{
let notidict = notifi as? NSDictionary
let notiname = notidict?.value(forKey: "message")
self.notilabell.append(notiname as! String)
let notidat = notidict?.value(forKey: "message") as! String
let dateformatter = DateFormatter()
dateformatter.dateFormat = "yyyy-MM-dd hh:mm:ss"
let mystring = dateformatter.string(from: Date())
let yourdate = dateformatter.date(from: mystring)
dateformatter.dateFormat = "dd-MM-yyyy"
let mynewdate = dateformatter.string(from: yourdate!)
self.notilabell.append(mynewdate as! String)
}
DispatchQueue.main.async {
self.mytable.reloadData()
}
}
else
{
print("No data got from URL")
}
}
else{
print("error httpstatus code is :",httpstatus?.statusCode)
}
}
task.resume()
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>错误在于您在解析日期时使用的日期格式化程序。此外，您所在日期的 key 也是错误的。尝试使用</p>
<pre><code> let notidat = notidict?.value(forKey: "date") as! String
let dateformatter = DateFormatter()
dateformatter.dateFormat = "yyyy-MM-dd'T'hh:mm:ss"
</code></pre>
<p>您将日期附加到 <code>notilabell</code> 数组而不是 <code>datelabel</code> 数组
更改以下代码</p>
<pre><code>let mynewdate = dateformatter.string(from: yourdate!)
self.notilabell.append(mynewdate as! String)
</code></pre>
<p><strong>收件人</strong></p>
<pre><code>let mynewdate = dateformatter.string(from: yourdate!)
self.datelabel.append(mynewdate as! String)
</code></pre></p>
<p style="font-size: 20px;">关于ios - 使用swift 3将日期显示到tableview单元格时出现索引超出范围错误，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/44623199/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/44623199/
</a>
</p>
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