我是 swift 新手,在 PlacesTableViewController 类中声明我的初始化程序时遇到问题。它提示我“在从初始化程序返回之前未调用 Super.init”,当我添加 Super.init 时,它提示我:
“必须调用超类 'UITableViewController' 的指定初始化程序”
这是我的 PlacesTableViewController.swift 文件:
class PlacesTableViewController: UITableViewController {
var pa55DB : COpaquePointer = nil
var selectStatement : COpaquePointer = nil;
var chapterdata : Array<Entry> = []
var ety : Entry
var sqlString : String = "";
var chpData : ChapterData
init(pa55DB : COpaquePointer,selectStatement : COpaquePointer, chapterdata : Array<Entry>, ety : Entry, sqlString : String) {
super.init()
self.pa55DB = pa55DB
self.selectStatement = selectStatement
self.chapterdata = chapterdata
self.ety = ety
self.sqlString = sqlString
}
required init!(coder aDecoder: NSCoder!) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
chpData = ChapterData(newEntryArray : chapterdata, entryV : ety, paDB55 : pa55DB, selectStatement : selectStatement, sqlString : sqlString)
chpData.openDB()
chapterdata = chpData.prepareStartment()
println("Testing...")
}
...
}
这是我的另一个名为 ChapterData.swift 的类文件,用于打开数据库和检索数据
class Entry {
let image : String!
let heading : String!
let title : String!
let description : String!
public init(image : String, heading : String, title : String, desc : String) {
self.heading = heading
self.image = image
self.title = title
self.description = desc
}
}
class ChapterData {
var paDB : COpaquePointer = nil;
var selectStatement : COpaquePointer = nil;
var sqlString : String = "";
var newEntryArray : Array<Entry> = [];
var entryV : Entry;
init(newEntryArray : Array<Entry>, entryV : Entry, paDB55 : COpaquePointer, selectStatement : COpaquePointer, sqlString : String){
self.newEntryArray = newEntryArray
self.entryV = entryV
self.paDB = paDB55
self.selectStatement = selectStatement
self.sqlString = sqlString
}
func openDB() {
var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
var docsDir = paths.stringByAppendingPathComponent("pa55.sqlite")
if (sqlite3_open(docsDir, &paDB) == SQLITE_OK) {
println("success open database")
}
else {
println("failed to open database")
}
}
func prepareStartment() -> Array<Entry> {
sqlString = "SELECT * FROM Chapter ORDER BY CID ASC"
var cSql = sqlString.cStringUsingEncoding(NSUTF8StringEncoding)
sqlite3_prepare_v2(paDB, cSql!, -1, &selectStatement, nil)
println("startment start")
while (sqlite3_step(selectStatement) == SQLITE_ROW) {
let image_buf = sqlite3_column_text(selectStatement, 3)
var image = String.fromCString(UnsafePointer<CChar>(image_buf))
let heading_buf = sqlite3_column_text(selectStatement, 1)
var heading = String.fromCString(UnsafePointer<CChar>(heading_buf))
let title_buf = sqlite3_column_text(selectStatement, 2)
var title = String.fromCString(UnsafePointer<CChar>(title_buf))
let desc_buf = sqlite3_column_text(selectStatement, 4)
var description = String.fromCString(UnsafePointer<CChar>(desc_buf))
entryV = Entry(image: image!, heading: heading!, title: title!, desc: description!)
newEntryArray.append(entryV)
}
println("select statement successful executed")
return newEntryArray
}
}