我想知道如何声明IndexPath类型的变量。如果有人可以向我展示如何使用内联条件,这也将非常有帮助。
var indexPath = 0
if PlaylistController.shared.playlists.count == 1 {
indexPath = IndexPath(item: sender.tag +1, section: 0)
}
else {
indexPath = IndexPath(item: sender.tag -1, section: 0)
}
答案 0 :(得分:1)
let indexPath : IndexPath =
PlaylistController.shared.playlists.count == 1 ?
IndexPath(item: sender.tag+1, section: 0) :
IndexPath(item: sender.tag-1, section: 0)
或者,我想更清楚:
let item = PlaylistController.shared.playlists.count == 1 ? sender.tag+1 :sender.tag-1
let indexPath = IndexPath(item:item, section:0)
答案 1 :(得分:1)
只需更改行:
var indexPath = 0
收件人:
let indexPath: IndexPath
或将整个内容替换为:
let indexPath = IndexPath(item: sender.tag + (PlaylistController.shared.playlists.count == 1 ? 1 : -1), section: 0)
答案 2 :(得分:1)
只需将变量的类型指定为IndexPath
,因为这是您需要存储的类型(您不想保存数字)
var indexPath: IndexPath