一个列表视图，加载不同的数据，为了使模型和视图分开可以使用适配器模式。图书，音乐，电影三个列表使用同一个列表进行展示，三者有各自不同的数据格式。
代码如下：
class BookModel: NSObject {
var name: String!
var author: String!
var cover: String!
init(name: String, author: String, cover: String) {
super.init()
self.name = name
self.author = author
self.cover = cover
}
}
class MusicModel: NSObject {
var name: String!
var singer: String!
var album: String!
init(name: String, singer: String, album: String) {
super.init()
self.name = name
self.singer = singer
self.album = album
}
}
class MovieModel: NSObject {
var name: String!
var director: String!
var poster: String!
init(name: String, director: String, poster: String) {
super.init()
self.name = name
self.director = director
self.poster = poster
}
}
列表视图包含 一个imageView，两个label。
定义一个协议 CustomCellAdapterProtocol
protocol CustomCellAdapterProtocol {
func title() -> String?
func subTitle() -> String?
func image() -> UIImage?
}
定义一个类实现该协议但不写具体方法，作为基类。
class CustomCellAdapter: NSObject, CustomCellAdapterProtocol {
var data: Any!
func title() -> String? {
return nil
}
func subTitle() -> String? {
return nil
}
func image() -> UIImage? {
return nil
}
}
然后编写模型适配器类
class ModelAdapter: CustomCellAdapter {
init(data: Any) {
super.init()
self.data = data
}
override func title() -> String? {
if ((data as? BookModel) != nil) {
let model = data as! BookModel
return model.name
} else if ((data as? MusicModel) != nil){
let model = data as! MusicModel
return model.name
} else {
let model = data as! MovieModel
return model.name
}
}
override func subTitle() -> String? {
if ((data as? BookModel) != nil) {
let model = data as! BookModel
return model.author
} else if ((data as? MusicModel) != nil){
let model = data as! MusicModel
return model.singer
} else {
let model = data as! MovieModel
return model.director
}
}
override func image() -> UIImage? {
if ((data as? BookModel) != nil) {
let model = data as! BookModel
return UIImage(named: model.cover)
} else if ((data as? MusicModel) != nil){
let model = data as! MusicModel
return UIImage(named: model.album)
} else {
let model = data as! MovieModel
return UIImage(named: model.poster)
}
}
}
列表视图加载数据
func loadData(data: CustomCellAdapterProtocol) {
self.headImageView.image = data.image()
self.headLabel.text = data.title()
self.subHeadLabel.text = data.subTitle()
}
