IGListKit 从 Alamofire 请求中插入数据到 class
IGListKit insert data to class from Alamofire request
所以我有这个模型
class Event: NSObject {
var _eventName: String!
var _venueName : String!
var _eventImage: String!
var eventName: String {
if _eventName == nil {
_eventName = ""
}
return _eventName
}
var venueName: String {
if _venueName == nil {
_venueName = ""
}
return _venueName
}
var eventImage: String {
if _eventImage == nil {
_eventImage = ""
}
return _eventImage
}
init(eventsDict: Dictionary<String, AnyObject>) {
if let venue = eventsDict["venue"] as? Dictionary<String, AnyObject> {
if let venuname = venue["name"] as? String{
self._venueName = venuname
}
if let eventname = eventsDict["name"] as? String {
self._eventName = eventname
}
if let eventimage = eventsDict["coverPicture"] as? String {
self._eventImage = eventimage
}
}
}
我用这个扩展使它成为 IGListDiffable。
extension NSObject: IGListDiffable {
public func diffIdentifier() -> NSObjectProtocol {
return self
}
public func isEqual(toDiffableObject object: IGListDiffable?) -> Bool {
return isEqual(object)
}
}
所以当我像这样从硬编码代码加载数据时
var entries = [Event]()
func loadFakeEvents() {
let entries = [
Event(
eventName: "Ζωρζ Πιλαλι Και Η Soufra Band Στο AN Groundfloor - Live Stage!",
venueName: "AN Groundfloor - live stage",
eventImage: "https://scontent.xx.fbcdn.net/v/t31.0-8/s720x720/15936729_1867160333520142_8855370744955080264_o.jpg?oh=8198bc10a8ea61011d7ec1902b34aa01&oe=593D6BC4"
),
Event(
date: "2017-02-18T21:30:00+0200",
name: "Διονύσης Σαββόπουλος at Gazarte I Main Stage 18/02",
venuename: "Gazarte",
eventImage: "https://scontent.xx.fbcdn.net/v/t1.0-9/s720x720/16265335_1262826863809003_3636661375515976849_n.jpg?oh=5bb342321a65d33dbc1cc41de266b45e&oe=5907857C"
)
]
self.entries = entries
}
事件加载正常。因为他们必须这样做。
但是当我发出 alamofire 请求时,当然需要一些时间来加载数据并将它们附加到空的事件数组中。
这是我必须调用事件的函数
func loadEvents() {
let parameters: Parameters = [
"Some" : "Parameters",
"Some" : "Parameters"
]
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
print(dict) // <-- Check this out
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
}
}
}
}
}
所以在上面的代码中我有一个打印,它打印了 json.
在我的
extension LocationViewController: IGListAdapterDataSource {
func objects(for listAdapter: IGListAdapter) -> [IGListDiffable] {
let items: [IGListDiffable] = loader.entries as [IGListDiffable]
print(items.count) // <--- another print of items that should be displayed
return items
}
func listAdapter(_ listAdapter: IGListAdapter, sectionControllerFor object: Any) -> IGListSectionController {
return NormalSectionController()
}
func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
}
Adapter i 也打印应该显示的项目。
所以当我加载 fakeEvents
函数时它打印 2
但是当我用正常函数加载它们时它打印 0
然后 JSON
来自 dict
var来自之前的代码。
通常我会 reloadData()
集合视图。
但是对于 IGListKit,将 Event Class 发送到 CollectionView 的技巧是什么?
非常感谢您的宝贵时间,希望我没有跑题!
将我在同一问题上的回答粘贴到 Github 以防有人找到。
https://github.com/Instagram/IGListKit/issues/468
当附加到条目 dict:
时,您似乎在 for 循环之后错过了对 self.adapter.performUpdates(animated: true) 的调用
func loadEvents() {
// ...
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if responseData.result.value != nil {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
// missing this!
self.adapter.performUpdates(animated: true)
// missing that!
}
}
}
}
}
所以我有这个模型
class Event: NSObject {
var _eventName: String!
var _venueName : String!
var _eventImage: String!
var eventName: String {
if _eventName == nil {
_eventName = ""
}
return _eventName
}
var venueName: String {
if _venueName == nil {
_venueName = ""
}
return _venueName
}
var eventImage: String {
if _eventImage == nil {
_eventImage = ""
}
return _eventImage
}
init(eventsDict: Dictionary<String, AnyObject>) {
if let venue = eventsDict["venue"] as? Dictionary<String, AnyObject> {
if let venuname = venue["name"] as? String{
self._venueName = venuname
}
if let eventname = eventsDict["name"] as? String {
self._eventName = eventname
}
if let eventimage = eventsDict["coverPicture"] as? String {
self._eventImage = eventimage
}
}
}
我用这个扩展使它成为 IGListDiffable。
extension NSObject: IGListDiffable {
public func diffIdentifier() -> NSObjectProtocol {
return self
}
public func isEqual(toDiffableObject object: IGListDiffable?) -> Bool {
return isEqual(object)
}
}
所以当我像这样从硬编码代码加载数据时
var entries = [Event]()
func loadFakeEvents() {
let entries = [
Event(
eventName: "Ζωρζ Πιλαλι Και Η Soufra Band Στο AN Groundfloor - Live Stage!",
venueName: "AN Groundfloor - live stage",
eventImage: "https://scontent.xx.fbcdn.net/v/t31.0-8/s720x720/15936729_1867160333520142_8855370744955080264_o.jpg?oh=8198bc10a8ea61011d7ec1902b34aa01&oe=593D6BC4"
),
Event(
date: "2017-02-18T21:30:00+0200",
name: "Διονύσης Σαββόπουλος at Gazarte I Main Stage 18/02",
venuename: "Gazarte",
eventImage: "https://scontent.xx.fbcdn.net/v/t1.0-9/s720x720/16265335_1262826863809003_3636661375515976849_n.jpg?oh=5bb342321a65d33dbc1cc41de266b45e&oe=5907857C"
)
]
self.entries = entries
}
事件加载正常。因为他们必须这样做。
但是当我发出 alamofire 请求时,当然需要一些时间来加载数据并将它们附加到空的事件数组中。
这是我必须调用事件的函数
func loadEvents() {
let parameters: Parameters = [
"Some" : "Parameters",
"Some" : "Parameters"
]
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
print(dict) // <-- Check this out
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
}
}
}
}
}
所以在上面的代码中我有一个打印,它打印了 json.
在我的
extension LocationViewController: IGListAdapterDataSource {
func objects(for listAdapter: IGListAdapter) -> [IGListDiffable] {
let items: [IGListDiffable] = loader.entries as [IGListDiffable]
print(items.count) // <--- another print of items that should be displayed
return items
}
func listAdapter(_ listAdapter: IGListAdapter, sectionControllerFor object: Any) -> IGListSectionController {
return NormalSectionController()
}
func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
}
Adapter i 也打印应该显示的项目。
所以当我加载 fakeEvents
函数时它打印 2
但是当我用正常函数加载它们时它打印 0
然后 JSON
来自 dict
var来自之前的代码。
通常我会 reloadData()
集合视图。
但是对于 IGListKit,将 Event Class 发送到 CollectionView 的技巧是什么?
非常感谢您的宝贵时间,希望我没有跑题!
将我在同一问题上的回答粘贴到 Github 以防有人找到。
https://github.com/Instagram/IGListKit/issues/468
当附加到条目 dict:
时,您似乎在 for 循环之后错过了对 self.adapter.performUpdates(animated: true) 的调用func loadEvents() {
// ...
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if responseData.result.value != nil {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
// missing this!
self.adapter.performUpdates(animated: true)
// missing that!
}
}
}
}
}