我需要你的帮助。我从url获取数据并想要在tableview中显示。但是当我下载数据时。数据被正确获取但是当相同的数据存储在全局变量中时，数组字符串类型然后显示将... 我的代码是
let requestURL: NSURL = NSURL(string: "https://api.myjson.com/bins/260yg")!
let urlRequest: NSMutableURLRequest = NSMutableURLRequest(URL: requestURL)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(urlRequest) {
(data, response, error) -> Void in
//print(NSString(data:data!,encoding:NSUTF8StringEncoding))
do{
let json = try NSJSONSerialization.JSONObjectWithData(data!, options:.AllowFragments)
if let users = json["userid"] as? NSArray
{
for(var i = 0; i < users.count; i++)
{
if let userindex = users[i] as? NSDictionary
{
if let username = userindex ["name"] as? NSString
{
self.tablename.append(username as String)
print(self.tablename)
if let email = userindex ["email"] as? NSString
{
self.tableemail.append(email as String)
}
}
}
}
}
else
{
print("nil")
}
}
catch
{
print("Error with Json: \(error)")
}
}
task.resume()
答案 0 :(得分：0)
以下是您的问题研究的示例。你想做这样的事情吗？
ViewController.swift
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet var tableView: UITableView!
var dataIsLoading = true
var usersArray = [User]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
let requestURL: NSURL = NSURL(string: "https://api.myjson.com/bins/260yg")!
let urlRequest: NSMutableURLRequest = NSMutableURLRequest(URL: requestURL)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(urlRequest) {
(data, response, error) -> Void in
//print(NSString(data:data!,encoding:NSUTF8StringEncoding))
do{
let json = try NSJSONSerialization.JSONObjectWithData(data!, options:.AllowFragments)
if let users = json["userid"] as? NSArray {
for user in users {
if let usersDictionary = user as? NSDictionary{
let newUser = User(jsonData: usersDictionary)
self.usersArray.append(newUser)
print(newUser.description)
}
}
dispatch_async(dispatch_get_main_queue()) {
self.dataIsLoading = false
self.tableView.reloadSections(NSIndexSet(index: 0), withRowAnimation: .Right)
}
}
else {
print("nil")
}
}
catch {
print("Error with Json: \(error)")
}
}
task.resume()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if dataIsLoading {
return 1
}
return usersArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if dataIsLoading {
if let cell = tableView.dequeueReusableCellWithIdentifier("CellWithActivityIndicator") {
return cell
}
} else {
if let cell = tableView.dequeueReusableCellWithIdentifier("Cell") {
if let userName = usersArray[indexPath.row].name {
cell.textLabel!.text = userName
}
if let userEmail = usersArray[indexPath.row].email {
cell.detailTextLabel?.text = userEmail
}
return cell
}
}
return UITableViewCell()
}
}
User.swift
import Foundation
class User {
var email: String?
var id: String?
var legalName: String?
var name: String?
var originalEmail: String?
var status: String?
init (jsonData: NSDictionary) {
// NSLog("\(jsonData)")
if let value = jsonData["email"] as? String{
self.email = value
}
email = getStringFromDictionary(jsonData, key: "email")
id = getStringFromDictionary(jsonData, key: "id")
legalName = getStringFromDictionary(jsonData, key: "legalName")
name = getStringFromDictionary(jsonData, key: "name")
originalEmail = getStringFromDictionary(jsonData, key: "originalEmail")
status = getStringFromDictionary(jsonData, key: "status")
}
private func getStringFromDictionary(jsonData: NSDictionary, key: String) -> String? {
if let value = jsonData[key] as? String {
return value
} else {
return nil
}
}
var description: String {
get {
var _description = ""
if let email = self.email {
_description += "email: \(email)\n"
}
if let id = self.id {
_description += "id: \(id)\n"
}
if let legalName = self.legalName {
_description += "legalName: \(legalName)\n"
}
if let name = self.name {
_description += "name: \(name)\n"
}
if let originalEmail = self.originalEmail {
_description += "originalEmail: \(originalEmail)\n"
}
if let status = self.status {
_description += "status: \(status)\n"
}
return _description
}
}
}
Main.storyboard
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15G31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" customModule="stackoverflow_39265393" customModuleProvider="target" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="default" rowHeight="44" sectionHeaderHeight="28" sectionFooterHeight="28" translatesAutoresizingMaskIntoConstraints="NO" id="wiD-eI-g2J">
<rect key="frame" x="0.0" y="28" width="600" height="572"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
<prototypes>
<tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" indentationWidth="10" reuseIdentifier="Cell" textLabel="Cmd-qa-ocs" detailTextLabel="HrM-h8-4qX" style="IBUITableViewCellStyleSubtitle" id="JkC-WR-0Eh">
<rect key="frame" x="0.0" y="28" width="600" height="44"/>
<autoresizingMask key="autoresizingMask"/>
<tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="JkC-WR-0Eh" id="hFF-W8-2zx">
<rect key="frame" x="0.0" y="0.0" width="600" height="43"/>
<autoresizingMask key="autoresizingMask"/>
<subviews>
<label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Title" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="Cmd-qa-ocs">
<rect key="frame" x="15" y="5" width="32" height="20"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="16"/>
<color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
<nil key="highlightedColor"/>
</label>
<label opaque="NO" multipleTouchEnabled="YES" contentMode="left" text="Subtitle" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="HrM-h8-4qX">
<rect key="frame" x="15" y="25" width="41" height="14"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="11"/>
<color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
</tableViewCellContentView>
</tableViewCell>
<tableViewCell clipsSubviews="YES" contentMode="scaleToFill" selectionStyle="default" indentationWidth="10" reuseIdentifier="CellWithActivityIndicator" id="yH2-KE-eBt">
<rect key="frame" x="0.0" y="72" width="600" height="44"/>
<autoresizingMask key="autoresizingMask"/>
<tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" tableViewCell="yH2-KE-eBt" id="EfS-TK-7UW">
<rect key="frame" x="0.0" y="0.0" width="600" height="43"/>
<autoresizingMask key="autoresizingMask"/>
<subviews>
<activityIndicatorView opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" animating="YES" style="gray" translatesAutoresizingMaskIntoConstraints="NO" id="0B4-ch-yMB">
<rect key="frame" x="290" y="12" width="20" height="20"/>
<color key="color" red="0.57687498029999995" green="0.69275407970000002" blue="1" alpha="1" colorSpace="calibratedRGB"/>
</activityIndicatorView>
</subviews>
<constraints>
<constraint firstItem="0B4-ch-yMB" firstAttribute="centerY" secondItem="EfS-TK-7UW" secondAttribute="centerY" id="90S-0E-56m"/>
<constraint firstItem="0B4-ch-yMB" firstAttribute="centerX" secondItem="EfS-TK-7UW" secondAttribute="centerX" id="nZM-Fl-Kcf"/>
</constraints>
</tableViewCellContentView>
</tableViewCell>
</prototypes>
</tableView>
</subviews>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
<constraints>
<constraint firstItem="wiD-eI-g2J" firstAttribute="bottom" secondItem="wfy-db-euE" secondAttribute="top" id="Ab4-X2-fLx"/>
<constraint firstItem="wiD-eI-g2J" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" id="DX3-Yd-a76"/>
<constraint firstItem="wiD-eI-g2J" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="8" symbolic="YES" id="Sbi-vj-app"/>
<constraint firstAttribute="trailing" secondItem="wiD-eI-g2J" secondAttribute="trailing" id="jtQ-Jz-Crb"/>
</constraints>
</view>
<connections>
<outlet property="tableView" destination="wiD-eI-g2J" id="ev1-pJ-OzP"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="664" y="467"/>
</scene>
</scenes>
</document>