I-Swift, njengolunye lwezilimi zokuhlela eziguquguqukayo nezinamandla, ivumela abathuthukisi ukuthi balawule izici ezihlukene zokusebenzelana kwe-iOS, okuhlanganisa ukukhubaza ukukhetha kwe-UITableView. Ake singene sijule enqubweni yesinyathelo ngesinyathelo sokuthi singakufeza kanjani lokhu, sizulazula emitatsheni yolwazi ehlukahlukene kanye nemisebenzi.
Ukukhubaza ukukhetha kwe-UITableView, kunendlela eqondile ye-Swift esingayisebenzisa. I-UITableView, ingxenye ebalulekile ngaphakathi kohlaka lwe-Swift's UIKit, idlala indima ebalulekile ekuboniseni uhlu lwedatha. Nokho, kungase kube nezimo lapho ukukhubaza isigaba se-UITableView kungase kudingeke, ukuze uthole ulwazi olungcono lomsebenzisi noma isixhumi esibonakalayo esinembile.
func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
return nil
}
Ukusebenzisa ikhodi engenhla kufayela lakho le-Swift kunikeza isisombululo sokukhubaza ukukhetha kwe-UITableView. Le ndlela iyingxenye yephrothokholi ye-UITableViewDelegate. Uma ubuyisela 'akukho' kusuka kule ndlela, itshela ukubuka kwethebula lakho ukuthi kungakhethi lutho uma umugqa ichofozwa umsebenzisi.
Ukuqonda iphrothokholi ye-UITableViewDelegate
Iphrothokholi ye-UITableViewDelegate, isidlali esibalulekile kulesi sixazululo, sivumela ukuguqulwa kwe-UITableView, yona ngokwayo eyingxenye ye-UIKit, uhlaka ku-Swift. I-UITableViewDelegate ihambisana nenye iphrothokholi ebalulekile, i-UITableViewDataSource, esebenza ngekhonsathi ukuze ilethe ukubukwa kwetafula okusebenzayo ezinhlelweni zokusebenza ze-iOS.
Ngokukhethekile, i-UITableViewDataSource iphatha idatha nokudalwa kweseli, kuyilapho i-UITableViewDelegate ilawula ukusebenzisana komsebenzisi. Ngakho-ke, ukukhubaza ukukhethwa kwemigqa ethile, sisebenzisa indlela ye-UITableViewDelegate.
Ukuhlola i-IndexPath Data Structure
Kuyini I-IndexPath, okukhulunywe ngakho kukhodi yethu? I-IndexPath isuka kuhlaka lweSisekelo, enye ingxenye ebalulekile yendawo yonke ye-Swift. Iwuhlaka lwedatha olufana nohlu oluqukethe amapheya ezinombolo, ezimelela izinombolo zezigaba nezinombolo zomugqa, ngokuvamile ezisetshenziswa ngaphakathi kwe-UITableView ne-UICollectionView ku-Swift.
Ukubuyisela okuthi `nil` endleleni `yewillSelectRowAt indexPath` kuqeda ngempumelelo noma yimaphi amathuba okuthi imigqa ikhethwe, njengoba kungekho mzila wenkomba okhonjiwe, ekugcineni ukufeza umgomo wethu.
Ukuqonda lezi zinkimbinkimbi ze-Swift, ikakhulukazi iphrothokholi ye-UITableViewDelegate ye-UIKit kanye ne-IndexPath, sikhubaza ngempumelelo ukukhethwa kweseli ye-UITableView, sithuthukisa ngokuphawulekayo ukusebenzisana komsebenzisi ezimweni ezithile.
Ezinye Izicelo Namagama Okugcina
Ngokusebenzisa le ndlela elula ye-Swift, singashintsha okungaphezu nje kwezakhiwo zokukhetha. Imitapo yolwazi ye-Swift enamandla nemisebenzi efana ne-UITableViewDelegate, i-UITableViewDataSource, ne-IndexPath isinika ikhono lokwakha izixhumanisi zabasebenzisi ezinembile, ezinamandla, nezinhle ezihambisana nesisekelo somsebenzisi we-iOS.
I-Swift nezinhlaka zayo ezinhle njenge-UIKit, i-cellForRowAtIndexPath kanye ne- didSelectRowAt inikeza amathuba angapheli okuhlola nokuhlola okwengeziwe ekuthuthukiseni ukusebenza kwe-UITableView. Esikuxoxile namuhla kuyiphuzu leqhwa kuphela uma kuziwa emandleni abanzi okwenza ngokwezifiso isixhumi esibonakalayo somsebenzisi we-iOS.
I-Swift, ulimi olunamandla lokuhlela, ayiboleki nje kuphela ekudaleni ama-UI anothile kodwa futhi nasekukhuthazeni izinhlelo zokusebenza ze-iOS ezisezingeni eliphezulu ezikhuthaza futhi zihehe izethameli njengengubo eklanywe kahle kakhulu ku-catwalk.
