我正在制作一个 iOS 应用程序，显示哪些电影是在某些城市拍摄的。我试图仅在一个 TableView 中显示重复的城市一次，并且仅在另一个 TableView 中显示在所选城市拍摄的电影。我的所有数据都是从我创建的本地 JSON 文件中读取的。目前，我的城市 TableView 显示所有重复的城市，我的电影表显示 JSON 文件中的所有电影。我希望城市表中没有重复的城市，并且只有从城市表中选择城市时在该城市拍摄的电影。
import UIKit
class cityTableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var movieObject = [Movies]()
@IBOutlet weak var cityTable: UITableView!
@IBOutlet weak var movieTable: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
self.cityTable.rowHeight = 50
self.movieTable.rowHeight = 50
cityTable.delegate = self
cityTable.dataSource = self
movieTable.delegate = self
movieTable.dataSource = self
readJson ()
}
func readJson() {
guard let path = Bundle.main.path(forResource: "movies", ofType: "json") else {return}
let url = URL(fileURLWithPath: path)
let task = URLSession.shared.dataTask(with: url) {(data,response,error) -> Void in
// If there is an error, print the error
if error != nil {
print(error!)
return
} // end if
do{
let data = try Data(contentsOf: url)
let json = try JSONSerialization.jsonObject(with: data, options: []) as AnyObject
let array = json as? [[String:Any]]
for eachMovie in array! {
if let movie = Movies(json: eachMovie)
{
self.movieObject.append(movie)
}
print(self.movieObject)
}
DispatchQueue.main.async{self.cityTable.reloadData()}
DispatchQueue.main.async{self.movieTable.reloadData()}
} catch {print(error)}
}
task.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return movieObject.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let mov:Movies = movieObject[indexPath.row]
if tableView == cityTable
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cityCell", for: indexPath) as! cityTableViewCell
//let cityArray = mov.City
//let index = cityArray?.first
//print("City: \(String(describing: index))")
var uniqueCity = [String]()
for elem in mov.City! {
if !uniqueCity.contains(elem)
{
uniqueCity.append(elem)
}
}
//print(uniqueCity)
let index = uniqueCity.first
cell.cityLabel.text = index
print("City: \(String(describing: index))")
return cell
}
else //if tableView == movieTable
{
let cell = tableView.dequeueReusableCell(withIdentifier: "movieCell", for: indexPath) as! movieTableCell
cell.movieLabel!.text = mov.Title
return cell
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
let destVC = segue.destination as! movieViewController
if let indexPath = self.movieTable.indexPathForSelectedRow {
let mov:Movies = movieObject[indexPath.row]
destVC.tvCity = mov.City!
destVC.tvTitle = mov.Title
destVC.tvDirector = mov.Director
destVC.tvYear = mov.Year
destVC.tvImage = mov.Image
destVC.tvWebsite = mov.Website
destVC.tvAddress = mov.Addresses!
}
}
}
//我的 json 文件
[
{
"id": "1",
"City": ["San Francisco, CA", "Long Beach, CA"],
"Title": "Titanic",
"Director": "James Cameron",
"Year": "1997",
"Image": "Titanic.jpg",
"Website": "https://www.imdb.com/title/tt0120338/",
"Address": [
"Pier 45, Fisherman's Wharf, San Francisco, CA 94133",
"4000 E Olympic Plaza Long Beach, CA 90803"
]
},
{
"id": "2",
"City": ["Los Angeles, CA"],
"Title": "Fast And Furious",
"Director": "Justin Lin",
"Year": "2009",
"Image": "f&f1.jpg",
"Website": "https://www.imdb.com/title/tt1013752/",
"Address": [
"3680 Wilshire Boulevard, Midtown, Los Angeles, CA 90010",
"1318 E 7th St Los Angeles, CA 90021",
"3385 W 8th St, Los Angeles, CA 90005",
"722 E Kensington Rd, Los Angeles, CA 90026"
]
},
{
"id": "3",
"City": ["Miami, FL"],
"Title": "2 Fast 2 Furious",
"Director": "John Singleton",
"Year": "2003",
"Image": "2f2f.jpg",
"Website": "https://www.imdb.com/title/tt0322259/",
"Address": [
"318 NW 23rd St, Miami, FL 33127",
"401 North Miami Avenue, Miami, FL 33136",
"3301 Rickenbacker Causeway, Key Biscayne, FL 33149",
"1 Ocean Drive, South Miami Beach, FL 33139",
"3555 SW 8th Street, East Coral Gables, FL 33135",
"1200 South Crandon Boulevard, Key Biscayne, FL 33149"
]
},
{
"id": "4",
"City": ["Los Angeles, CA"],
"Title": "The Fast and The Furious",
"Director": "Rob Cohen",
"Year": "2001",
"Image": "tf&tf.jpg",
"Website": "https://www.imdb.com/title/tt0232500/",
"Address": [
"1000 Vin Scully Avenue, Los Angeles, CA 90012",
"42505 Pacific Coast Highway, Malibu, CA 90265",
"N Orange Dr, Los Angeles, CA 90038",
"Center St, Los Angeles, CA 90021"
]
},
{
"id": "5",
"City": ["Los Angeles, CA" ],
"Title": "The Fast And The Furious: Tokyo Drift",
"Director": "Justin Lin",
"Year": "2006",
"Image": "tokyodrift.jpeg",
"Website": "https://www.imdb.com/title/tt0463985/",
"Address": [
"San Gabriel Canyon Rd, Azusa, CA 91702",
"12630 Hawthorne Blvd, Hawthorne, CA 90250",
"2001 Santa Fe Ave, Long Beach, CA 90810"
]
},
{
"id": "6",
"City": ["Los Angeles, CA", "Atlanta, GA"],
"Title": "Furious 7",
"Director": "James Wan",
"Year": "2015",
"Image": "f&f7.jpeg",
"Website": "https://www.imdb.com/title/tt2820852/",
"Address": [
"722 E Kensington Rd, Los Angeles, CA 90026",
"248 Oakland Ave SE, Atlanta, GA 30312",
"Mahers Quarry Rd, Stockbridge, GA 30281"
]
},
{
"id": "7",
"City": ["Miami, FL", "New York, NY"],
"Title": "Scarface",
"Director": "Brian de Palma",
"Year": "1983",
"Image": "scarface.jpg",
"Website": "https://www.imdb.com/title/tt0086250/",
"Address": [
"728 Ocean Drive, Miami Beach, FL 33139",
"4441 Collins Avenue, Miami, FL 33140",
"E 41st St, New York, NY 10017"
]
},
{
"id": "8",
"City": ["Chicago, IL"],
"Title": "Batman Begins",
"Director": "Christopher Nolan",
"Year": "2005",
"Image": "BmanBegins.jpg",
"Website": "https://www.imdb.com/title/tt0372784/",
"Address": [
"141 W Jackson Blvd, Chicago, IL 60604",
"200 N Franklin St, Chicago, IL 60606",
"35 E Upper Wacker Dr, Chicago, IL 60601"
]
},
{
"id": "9",
"City": ["Detroit, MI", "Chicago, IL", "Los Angeles, CA"],
"Title": "Batman v Superman: Dawn Of Justice",
"Director": "Zack Snyder",
"Year": "2016",
"Image": "BmanvSman.jpg",
"Website": "https://www.imdb.com/title/tt2975590/",
"Address": [
"2301 Clarkston Road, Orion Charter Township, MI 48360",
"547 East Circle Drive, East Lansing, MI 48824",
"1106 West Lawrence Avenue, Chicago, IL 60640",
"1301 Avenida Cesar Chavez, Monterey Park, CA 91754",
"600 Randolph Street, Detroit, MI 48226"
]
},
{
"id": "10",
"City": [ "Chicago, IL"],
"Title": "The Dark Knight",
"Director": "Christopher Nolan",
"Year": "2008",
"Image": "DKnight.jpg",
"Website": "https://www.imdb.com/title/tt0468569/",
"Address": [
"1665 N Sedgwick St, Chicago, IL 60614",
"404 W Harrison St, Chicago, IL 60607",
"200 W Randolph St, Chicago, IL 60606",
"330 N Wabash Ave, Chicago, IL 60611"
]
},
{
"id": "11",
"City": ["Los Angeles, CA", "New York, NY"],
"Title": "The Dark Knight Rises",
"Director": "Christopher Nolan",
"Year": "2012",
"Image": "DKnightRises.jpg",
"Website": "https://www.imdb.com/title/tt1345836/",
"Address": [
"725 5th Ave, New York, NY 10022",
"23 Wall St, New York, NY 10005",
"433 S Spring St, Los Angeles, CA 90013"
]
},
{
"id": "12",
"City": ["Los Angeles, CA"],
"Title": "Superman Returns",
"Director": "Bryan Singer",
"Year": "2006",
"Image": "SmanReturns.jpg",
"Website": "https://www.imdb.com/title/tt0348150/",
"Address": [
"1000 Vin Scully Avenue, Los Angeles, CA 90012"
]
},
{
"id": "13",
"City": ["Los Angeles, CA"],
"Title": "Suicide Squad",
"Director": "David Ayer",
"Year": "2016",
"Image": "SSquad.jpg",
"Website": "https://www.imdb.com/title/tt1386697/",
"Address": [
"617 S Olive St, Los Angeles, CA 90014"
]
},
{
"id": "14",
"City": ["Chicago, IL"],
"Title": "Home Alone",
"Director": "Chris Columbus",
"Year": "1990",
"Image": "homealone.jpg",
"Website": "https://www.imdb.com/title/tt0099785/",
"Address": [
"671 Lincoln Ave, Winnetka, IL 60093",
"1024 Lake Ave, Wilmette, IL 60091",
"10000 W O'Hare Ave, Chicago, IL 60666"
]
}
]
最佳答案
你可以试试这个:
var uniqueCity = [String]() // make this global
func readJson() {
guard let path = Bundle.main.path(forResource: "movies", ofType: "json") else {return}
let url = URL(fileURLWithPath: path)
let task = URLSession.shared.dataTask(with: url) {(data,response,error) -> Void in
// If there is an error, print the error
if error != nil {
print(error!)
return
} // end if
do{
let data = try Data(contentsOf: url)
let json = try JSONSerialization.jsonObject(with: data, options: []) as AnyObject
let array = json as? [[String:Any]]
for eachMovie in array! {
if let movie = Movies(json: eachMovie)
{
let city = movie.tvCity
if (!self.uniqueCity.contains(city)) { // change here
self.uniqueCity.append(city)
}
self.movieObject.append(movie)
}
print(self.movieObject)
}
DispatchQueue.main.async{self.cityTable.reloadData()}
DispatchQueue.main.async{self.movieTable.reloadData()}
} catch {print(error)}
}
task.resume()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (tableView == cityTable) { // change here
return uniqueCity.count
}
return movieObject.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let mov:Movies = movieObject[indexPath.row]
if tableView == cityTable
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cityCell", for: indexPath) as! cityTableViewCell
//print(uniqueCity)
let index = uniqueCity[indexPath.item] // change here
cell.cityLabel.text = index
print("City: \(String(describing: index))")
return cell
}
else //if tableView == movieTable
{
let cell = tableView.dequeueReusableCell(withIdentifier: "movieCell", for: indexPath) as! movieTableCell
cell.movieLabel!.text = mov.Title
return cell
}
}
关于ios - 在 TableView 中仅显示一次 json 数组中的重复元素 swift，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50959346/