我想将一些配置数据保存到包含数组和常规变量类型的plist文件中。它看起来像这样:
(http://s10.postimg.org/f2xpgur1l/plist.png) (抱歉,我无法附上任何图片)
我的功能是这样的:
// Saves the data into a plist file
func saveObject(i_fileName: String, i_keyForValueToSave: String, i_valueToSave: String, i_keyForXInitializer:String, i_valueXInitializer: String) {
var fileName: String = i_fileName
var keyForValueToSave: String = i_keyForValueToSave
var valueToSave: AnyObject = i_valueToSave
var keyForXInitializer: String = i_keyForXInitializer
var valueXInitializer: String = i_valueXInitializer
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDirectory = paths.objectAtIndex(0) as! NSString
let path = documentsDirectory.stringByAppendingPathComponent(fileName)
var dict: NSMutableDictionary = [keyForXInitializer: valueXInitializer]
//saving values
dict.setObject(valueToSave, forKey: keyForValueToSave)
//writing to plist
dict.writeToFile(path, atomically: false)
let resultDictionary = NSMutableDictionary(contentsOfFile: path)
println("Saved Data.plist file is --> \(resultDictionary?.description)")
}
我称之为:
saveObject("Selection.plist", "Item 0", "testConfig, "Item 3", "XInitializerItem_01")
结果看起来像是这样:
(http://s13.postimg.org/kbq103707/result.png) (抱歉,我无法附上任何图片)
如您所见,应保存到数组中的“testConfig”将保存为pilst文件中的普通字符串。这不是我的目标。我想要添加到此数组的每个项目。我是SWIFT的新手,而且我是一个但却陷入太空的人。任何帮助都会很棒!谢谢!
答案 0 :(得分:0)
您将valueToSave
声明为AnyObject
,但它保留i_valueToSave
,在您的函数参数中声明为String
。
因此,当您执行dict.setObject(valueToSave, forKey: keyForValueToSave)
时,会保存String
。
您应该将i_valueToSave
函数参数的类型声明为AnyObject
而不是String
,然后在函数内部,您可以将i_valueToSave
投射到所需的类型在保存之前。
假设i_valueToSave
是一个字符串数组,那么:
if let valueToSave = i_valueToSave as? [String] {
dict.setObject(valueToSave, forKey: keyForValueToSave)
}
如果是NSArray:
if let valueToSave = i_valueToSave as? NSArray {
dict.setObject(valueToSave, forKey: keyForValueToSave)
}
等
答案 1 :(得分:0)
下面的代码会创建您需要的plist,您只需要正确填充值以满足您的需求
func saveObject(i_fileName: String, i_keyForValueToSave: String, i_valueToSave: String, i_keyForXInitializer:String, i_valueXInitializer: String) {
var fileName: String = i_fileName
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDirectory = paths.objectAtIndex(0) as! NSString
let path = documentsDirectory.stringByAppendingPathComponent(fileName)
var dict = NSMutableDictionary()
var item0 = [1,2,3]
var item1 = [1,2,3,4]
var item2 = false
var item3 = "xInitializerItem_01"
dict.setObject([item0, item1, item2, item3], forKey: "selection_01")
item0 = [4,5,6]
item1 = [5,6,7,8]
item2 = true
item3 = "xInitializerItem_02"
dict.setObject([item0, item1, item2, item3], forKey: "selection_02")
dict.writeToFile(path, atomically: true)
let resultDictionary = NSMutableDictionary(contentsOfFile: path)
println("Saved Data.plist file is --> \(resultDictionary?.description)")
}
这可能是由上面的代码引起的:
您无法将值附加到plist,因此每次保存时都需要再次保存所有值