Question

我想在UITableView内显示用户列表。我构建它后出现了这个错误。

我创建了一个数据模型来存储用户列表。

CRUDSwiftData.swift

import UIKit

class CRUDSwiftData: NSObject {

    var title: String
    var rating: Float

    init(title: String,rating: Float) {
        self.title = title
        self.rating = rating
    }

}

CRUDSwiftDoc.swift

import UIKit

class CRUDSwiftDoc: NSObject {

    var data:CRUDSwiftData
    var thumbImage:UIImage
    var fullImage:UIImage

    init(title: String,rating: Float,data:CRUDSwiftData, thumbImage:UIImage, fullImage:UIImage) {
        self.data = CRUDSwiftData(title: title,rating: rating);
        self.thumbImage = thumbImage
        self.fullImage = fullImage
    }
}

然后我将我的MasterViewController.swift课程编辑到此

中

MasterViewController.swift

var users: NSMutableArray = []

// At the end of viewDidLoad
self.title = "User List";

// Replace the return statement in tableView:numberOfRowsInSection with the following:
return users.count

// Replace tableView:cellForRowAtIndexPath with the following
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  UITableViewCell *cell = [tableView
               dequeueReusableCellWithIdentifier:@"MyBasicCell"];
  let user = users[indexPath.row] as CRUDSwiftDoc
  cell.textLabel.text = user.data.title
  cell.imageView.image = user.thumbImage
  return cell;
}

最后我的AppDelegate.swift就像这样

AppDelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
        // Override point for customization after application launch.
        let user1 = CRUDSwiftDoc(title:"Potato Bug", rating: "4", thumbImage: "potatoBugThumb.jpg", fullImage: "potatoBug.jpg")
        let user2 = CRUDSwiftDoc(title:"House Centipede", rating: "3", thumbImage: "centipedeThumb.jpg", fullImage: "centipede.jpg")
        let user3 = CRUDSwiftDoc(title:"Wolf Spider", rating: "5", thumbImage: "wolfSpiderThumb.jpg", fullImage: "wolfSpider.jpg")
        let user4 = CRUDSwiftDoc(title:"Lady Bug", rating: "1", thumbImage: "ladybugThumb.jpg", fullImage: "ladybug.jpg")
        let shoppingList: NSMutableArray[] = [user1, user2, user3, user4]

        return true
    }

AppDelegate.swift

中有4个错误

enter image description here

请建议。

我的源代码：https://github.com/datomnurdin/CRUDSwift

Answer 1

编译器说实话！你在打电话

let user1 = CRUDSwiftDoc(title:"Potato Bug", rating: "4", thumbImage: "potatoBugThumb.jpg", fullImage: "potatoBug.jpg")

但您的声明需要

init(title: String, rating: Float, data:CRUDSwiftData, thumbImage:UIImage, fullImage:UIImage) {

您未提供数据！

更新的您需要通过init将数据传递给CRUDSwiftDoc（），但是A）您没有传入它，而B）您正在计算它作为init。您需要将init更改为

class CRUDSwiftDoc: NSObject {

    var data:CRUDSwiftData
    var thumbImage:UIImage
    var fullImage:UIImage

    init(title: String, rating: Float, thumbImage:UIImage, fullImage:UIImage) { // No data!!!
        self.data = CRUDSwiftData(title: title,rating: rating);
        self.thumbImage = thumbImage
        self.fullImage = fullImage
    }
}

另请注意，您将评级作为字符串传递（评级：＆＃34; 4＆＃34;），而不是声明的Float。

Answer 2

你的CRUDSwiftDoc类有这样的初始化：

init(title: String,rating: Float,data:CRUDSwiftData, thumbImage:UIImage, fullImage:UIImage)

第3个参数是数据但是在

中初始化4个对象时

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool

您没有提供数据参数：

let user1 = CRUDSwiftDoc(title:"Potato Bug", rating: "4", thumbImage: "potatoBugThumb.jpg", fullImage: "potatoBug.jpg")

您必须在rating和thumbImage之间添加数据。

你也将字符串传递给rating参数但是它需要float并且你再次将字符串传递给thumbImage和fullImage，但它需要UIImage。将其更改为：

let data1 = CRUDSwiftData(title: "title 1", rating: 2.1);
let user1 = CRUDSwiftDoc(title:"Potato Bug", rating: 4.0, data:data1, thumbImage: UIImage(named:"potatoBugThumb.jpg"), fullImage: UIImage(named:"potatoBug.jpg"))

您遇到的最后一个问题是您创建了NSMUtableArray数组但是传递了CRUDSwiftDoc对象的数组。用以下代码替换您的代码：

let shoppingList：CRUDSwiftDoc [] = [user1，user2，user3，user4]

Swift - 缺少参数＆＃39;数据的参数＆＃39;在电话中

2 个答案: