在我的应用程序中,用户在HomeViewController中选择A或B,然后在LocationViewController中,他们从表视图中选择一个地方,最后ResultViewController汇总其他用户的选票。
我被困在LocationViewController中将用户选择注册到Firebase
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
if userVote == "A" {
// add vote count by 1 to A of Location ABC in Firebase
// register this vote to user's path too
} else {
// add vote count by 1 to B of Location ABC in Firebase
// register this vote to user's path too
}
}
我是iOS,Swift和Firebase的新手,在AppCoda的本教程帮助下,我设法做到了这一点。任何帮助表示赞赏:)
这是我的解决方案,没有要在其中注册对用户ID的投票的部分。不确定这是否是最有效的方法,请随时发表评论:
var businesses = [Business]()
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let indexPath = tableView.indexPathForSelectedRow!
let business = businesses[indexPath.row]
// Get the Firebase key of the selected row
let businessId = business.businessKey
// Get the path to the vote data
let voteARef = ref.childByAppendingPath(businessId).childByAppendingPath("voteA")
let voteBRef = ref.childByAppendingPath(businessId).childByAppendingPath("voteB")
if userVote == "voteA" {
voteARef.runTransactionBlock({
(currentData:FMutableData!) in
var value = currentData.value as? Int
if (value == nil) {
value = 0
}
currentData.value = value! + 1
return FTransactionResult.successWithValue(currentData)
})
} else {
voteBRef.runTransactionBlock({
(currentData:FMutableData!) in
var value = currentData.value as? Int
if (value == nil) {
value = 0
}
currentData.value = value! + 1
return FTransactionResult.successWithValue(currentData)
})
}
performSegueWithIdentifier("ResultSegue", sender: self)
}
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我来说两句