我显示了一个警报视图,可以在选中时重命名图书。我在检索用户输入时遇到问题。
这是我的代码:
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let optionMenu = UIAlertController(title: nil, message: "Choose Option", preferredStyle: .ActionSheet)
let newBookAction = UIAlertAction(title: "Add New Book", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
var alert = UIAlertController(title: "Add New Book", message: "What is the Name of the New Book?", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
alert.addTextFieldWithConfigurationHandler { (textField) in
textField.placeholder = "New Book Name"
}
self.currentShelf.addNewBook(Book(bookName: self.alert.textFields[0] as String))
self.presentViewController(alert, animated: true, completion: nil)
self.tableView.reloadData()
println("Book Added")
})
let deleteAction = UIAlertAction(title: "Delete", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
self.currentShelf.allBooksOnShelf.removeAtIndex(indexPath.row)
self.tableView.reloadData()
println("Book Deleted")
})
let updateAction = UIAlertAction(title: "Update", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
println("Book Updated")
})
let readAction = UIAlertAction(title: "Read", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
if self.currentShelf.allBooksOnShelf[indexPath.row].hasBeenRead == false{
self.currentShelf.allBooksOnShelf[indexPath.row].hasBeenRead = true
var alert = UIAlertController(title: "Read Book", message: "Thanks For Reading!", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
println("Book Read")
}
else{
self.currentShelf.allBooksOnShelf[indexPath.row].hasBeenRead = false
var alert = UIAlertController(title: "Unread Book", message: "You Just UnRead A Book...", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
println("Book Unread")
}
})
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: {
(alert: UIAlertAction!) -> Void in
println("Cancelled")
})
optionMenu.addAction(newBookAction)
optionMenu.addAction(readAction)
optionMenu.addAction(updateAction)
optionMenu.addAction(deleteAction)
optionMenu.addAction(cancelAction)
self.presentViewController(optionMenu, animated: true, completion: nil)
}
我遇到麻烦的地方是:
let newBookAction = UIAlertAction(title: "Add New Book", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
var alert = UIAlertController(title: "Add New Book", message: "What is the Name of the New Book?", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
alert.addTextFieldWithConfigurationHandler { (textField) in
textField.placeholder = "New Book Name"
}
self.currentShelf.addNewBook(Book(bookName: self.alert.textFields[0] as String))
self.presentViewController(alert, animated: true, completion: nil)
self.tableView.reloadData()
println("Book Added")
})
我希望这是一个简单的修复,我感谢任何帮助。谢谢!
答案 0 :(得分:2)
您需要为该警报控制器添加一个完成处理程序,该处理程序获取新字符串并使用它来更新您的书名。类似的东西:
let newBookAction = UIAlertAction(title: "Add New Book", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in
var alert = UIAlertController(title: "Add New Book", message: "What is the Name of the New Book?", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
alert.addTextFieldWithConfigurationHandler { (textField) in
textField.placeholder = "New Book Name"
}
self.presentViewController(alert, animated: true) {
let textField = alert.textFields[0] as UITextField
self.currentShelf.addNewBook(Book(bookName: textField.text))
self.tableView.reloadData()
println("Book Added")
}
})