我有一个“通知”视图，其中包含UITextViews，每个视图都需要显示与JSON数组不同的对象。
我已经厌倦了使用许多不同的搜索词查找此问题，但到目前为止，对我来说，什么都没有解决。编译器要么向我抛出错误，要么UITextViews仅显示数组中的同一对象。
struct notifications: Decodable {
let count: Int
let results: [results]?
}
struct results: Decodable {
let area: String
let post: [post]
}
struct post: Decodable {
let text:String
}
这些是我用来解析此JSON数据的结构；
{
"count": 7,
"next": null,
"previous": null,
"results": [
{
"id": "4188673013",
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"anonym": false,
"subscribed": true,
"created": "2019-02-27T05:18:15.807202Z",
"active": true,
"text": "testing anonym",
"image": null,
"additional_images": [],
"comments": []
},
{
"id": "5822615812",
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"anonym": false,
"subscribed": true,
"created": "2019-02-23T23:21:15.610355Z",
"active": true,
"text": "testing anonym",
"image": null,
"additional_images": [],
"comments": []
},
{
"id": "6398321511",
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"anonym": false,
"subscribed": true,
"created": "2019-02-23T22:31:16.853392Z",
"active": true,
"text": "testing anonym",
"image": null,
"additional_images": [],
"comments": []
},
{
"id": "3377948310",
"author": null,
"anonym": true,
"subscribed": true,
"created": "2019-02-23T02:35:29.093044Z",
"active": true,
"text": "testing anonym",
"image": null,
"additional_images": [],
"comments": []
},
{
"id": "401558607",
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"anonym": false,
"subscribed": true,
"created": "2019-02-22T03:24:39.827535Z",
"active": true,
"text": "This is a test from the iOS app. Just making sure the severs can read this!",
"image": null,
"additional_images": [],
"comments": []
},
{
"id": "293944243",
"author": null,
"anonym": true,
"subscribed": true,
"created": "2019-02-20T23:54:44.394823Z",
"active": true,
"text": "Example anon post by admin user.",
"image": "http://localhost:8000/media/images/316543563559387320642618685485080866736.png",
"additional_images": [],
"comments": [
{
"id": 5,
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"created": "2019-02-20T23:54:44.403393Z",
"text": "Hey, who are you to claim that you are me.",
"image": null
},
{
"id": 6,
"author": {
"user": 2,
"name": "user",
"avatar": null,
"bio": "",
"banned": false
},
"created": "2019-02-20T23:54:44.408061Z",
"text": "It would be funny, if it were actually you.",
"image": null
}
]
},
{
"id": "603485211",
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"anonym": false,
"subscribed": true,
"created": "2019-02-20T23:54:44.322104Z",
"active": true,
"text": "Post by admin\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit.",
"image": null,
"additional_images": [],
"comments": [
{
"id": 1,
"author": {
"user": 1,
"name": "admin",
"avatar": null,
"bio": "The sampledata superuser.\nLogin: `admin:password123`",
"banned": false
},
"created": "2019-02-20T23:54:44.335768Z",
"text": "First comment, by admin.\n\nPhasellus fringilla odio vitae nibh aliquet facilisis.",
"image": null
},
{
"id": 2,
"author": {
"user": 2,
"name": "user",
"avatar": null,
"bio": "",
"banned": false
},
"created": "2019-02-20T23:54:44.341323Z",
"text": "Another comment.\n\nNunc pellentesque urna eget ipsum vestibulum luctus. Praesent fermentum purus at pellentesque molestie.",
"image": null
}
]
}
]
}
我正在解析数据；
guard let data = data else {return}
do{
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let notificationsDataArray = try decoder.decode(notifications.self, from: data)
print(notificationsDataArray.results)
for results in notificationsDataArray.results!{
for posts in results.post{
self.Recent1.text = posts.text
}
}
}catch{
print(error)
}
我总共有4个UITextViews。
@IBOutlet weak var Recent1: UILabel!
@IBOutlet weak var Recent2: UILabel!
@IBOutlet weak var Recent3: UILabel!
@IBOutlet weak var Recent4: UILabel!
我只想显示数组中的第四个对象。我也希望每个UITextView显示一个不同的对象。最好的方法是什么？
值得注意的是，我是一个快速编程的初学者。
答案 0 :(得分：0)
首先请遵守命名约定，变量名称以小写字母开头，而结构和类以大写字母开头。
struct Notifications : Decodable {
let count: Int
let results: [Post]
}
struct Post : Decodable {
let id: String
let author: Author?
let anonym: Bool
let subscribed: Bool
let created: String
let active: Bool
let text: String
let image: URL?
let comments: [Comment]
}
struct Comment : Decodable { ...
struct Author : Decodable { ...
...
@IBOutlet weak var recent1: UILabel!
@IBOutlet weak var recent2: UILabel!
@IBOutlet weak var recent3: UILabel!
@IBOutlet weak var recent4: UILabel!
将标签放入数组
let labelArray = [recent1, recent2, recent3, recent4]
在循环中，如果所有4个标签均带有文本（或可用帖子少于4个），则使用计数器退出循环。
guard let data = data else { return }
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let notifications = try decoder.decode(Notifications.self, from: data)
print(notifications.results)
var counter = 0
for post in notifications.results {
labelArray[counter].text = post.text
if counter == 3 { break }
counter += 1
}
} catch {
print(error)
}