Iphone 即使不使用',您是否可以将settings.bundle中的设置设置为默认设置;t打开设置应用程序
我有一个带有settings.bundle的iPhone应用程序,它可以处理我的应用程序的各种设置。我可以在root.plist文件中设置默认值(使用DefaultValue属性),但这些值仅在用户第一次打开设置应用程序时使用。有什么方法可以在应用程序安装时写出这些值?我知道我可以编写代码检查我的应用程序的首次启动,然后将它们写出来,但它们位于两个不同的位置 以下是my root.plist中的一个条目作为示例:Iphone 即使不使用',您是否可以将settings.bundle中的设置设置为默认设置;t打开设置应用程序,iphone,cocoa-touch,Iphone,Cocoa Touch,我有一个带有settings.bundle的iPhone应用程序,它可以处理我的应用程序的各种设置。我可以在root.plist文件中设置默认值(使用DefaultValue属性),但这些值仅在用户第一次打开设置应用程序时使用。有什么方法可以在应用程序安装时写出这些值?我知道我可以编写代码检查我的应用程序的首次启动,然后将它们写出来,但它们位于两个不同的位置 以下是my root.plist中的一个条目作为示例: <dict> <key>Type</key&
<dict>
<key>Type</key>
<string>PSToggleSwitchSpecifier</string>
<key>Title</key>
<string>Open To Top Location</string>
<key>Key</key>
<string>open_top_location</string>
<key>DefaultValue</key>
<string>YES</string>
<key>TrueValue</key>
<string>YES</string>
<key>FalseValue</key>
<string>NO</string>
</dict>
类型
psToggleSwitch说明符
标题
开放到顶部位置
钥匙
打开顶部位置
默认值
对
真值
对
虚假价值
不
最终的结果应该是,如果我要求“打开到顶部位置”,我会得到一个“是”,而不是直到用户第一次打开设置应用程序时才出现
有什么想法吗?如果我理解正确,您希望避免将默认值指定两次(一次在Settings.bundle/Root.plist文件中作为“DefaultValue”键,一次在应用程序初始化代码中),这样您就不必保持同步 由于Settings.bundle存储在应用程序包本身中,因此您可以读取其中给出的默认值。我整理了一些示例代码,查看设置包并读取每个键的默认值。请注意,这不会写出默认键;如果它们不存在,您需要在每次发布时阅读并注册它们(请随意更改)。我只做了一些粗略的测试,所以请确保它在所有情况下都适用于您
- (void)applicationDidFinishLaunching:(UIApplication *)application {
NSString *name = [[NSUserDefaults standardUserDefaults] stringForKey:@"name"];
NSLog(@"name before is %@", name);
// Note: this will not work for boolean values as noted by bpapa below.
// If you use booleans, you should use objectForKey above and check for null
if(!name) {
[self registerDefaultsFromSettingsBundle];
name = [[NSUserDefaults standardUserDefaults] stringForKey:@"name"];
}
NSLog(@"name after is %@", name);
}
- (void)registerDefaultsFromSettingsBundle {
NSString *settingsBundle = [[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"bundle"];
if(!settingsBundle) {
NSLog(@"Could not find Settings.bundle");
return;
}
NSDictionary *settings = [NSDictionary dictionaryWithContentsOfFile:[settingsBundle stringByAppendingPathComponent:@"Root.plist"]];
NSArray *preferences = [settings objectForKey:@"PreferenceSpecifiers"];
NSMutableDictionary *defaultsToRegister = [[NSMutableDictionary alloc] initWithCapacity:[preferences count]];
for(NSDictionary *prefSpecification in preferences) {
NSString *key = [prefSpecification objectForKey:@"Key"];
if(key && [[prefSpecification allKeys] containsObject:@"DefaultValue"]) {
[defaultsToRegister setObject:[prefSpecification objectForKey:@"DefaultValue"] forKey:key];
}
}
[[NSUserDefaults standardUserDefaults] registerDefaults:defaultsToRegister];
[defaultsToRegister release];
}
这是我基于@PCheese的代码,它增加了对没有默认值和子窗格的键的支持
- (void)registerDefaultsFromSettingsBundle {
[[NSUserDefaults standardUserDefaults] registerDefaults:[self defaultsFromPlistNamed:@"Root"]];
}
- (NSDictionary *)defaultsFromPlistNamed:(NSString *)plistName {
NSString *settingsBundle = [[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"bundle"];
NSAssert(settingsBundle, @"Could not find Settings.bundle while loading defaults.");
NSString *plistFullName = [NSString stringWithFormat:@"%@.plist", plistName];
NSDictionary *settings = [NSDictionary dictionaryWithContentsOfFile:[settingsBundle stringByAppendingPathComponent:plistFullName]];
NSAssert1(settings, @"Could not load plist '%@' while loading defaults.", plistFullName);
NSArray *preferences = [settings objectForKey:@"PreferenceSpecifiers"];
NSAssert1(preferences, @"Could not find preferences entry in plist '%@' while loading defaults.", plistFullName);
NSMutableDictionary *defaults = [NSMutableDictionary dictionary];
for(NSDictionary *prefSpecification in preferences) {
NSString *key = [prefSpecification objectForKey:@"Key"];
id value = [prefSpecification objectForKey:@"DefaultValue"];
if(key && value) {
[defaults setObject:value forKey:key];
}
NSString *type = [prefSpecification objectForKey:@"Type"];
if ([type isEqualToString:@"PSChildPaneSpecifier"]) {
NSString *file = [prefSpecification objectForKey:@"File"];
NSAssert1(file, @"Unable to get child plist name from plist '%@'", plistFullName);
[defaults addEntriesFromDictionary:[self defaultsFromPlistNamed:file]];
}
}
return defaults;
}
同一主题的多个版本。我保留了Lawrence Johnston对儿童窗格的支持,并添加了i18n/l10n支持
// This code is folklore, first created by an unknown person and copied, pasted
// and published by many different programmers, each (hopefully) of whom added
// some improvemrnts. (c) the People of the Earth
- (NSDictionary *)defaultsFromPlistNamed:(NSString *)plistName {
NSString *settingsBundlePath = [[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"bundle"];
if (!settingsBundlePath) {
NSAssert(settingsBundlePath, @"Could not find Settings.bundle while loading defaults.");
return nil;
}
NSBundle *settingsBundle = [NSBundle bundleWithPath:settingsBundlePath];
if (!settingsBundlePath) {
NSAssert(settingsBundle, @"Could not load Settings.bundle while loading defaults.");
return nil;
}
NSString *plistFullName = [settingsBundle pathForResource:plistName ofType:@"plist"];
if (!plistName) {
NSAssert1(settings, @"Could not find plist '%@' while loading defaults.", plistFullName);
return nil;
}
NSDictionary *settings_dic = [NSDictionary dictionaryWithContentsOfFile:plistFullName];
if (!settings_dic) {
NSAssert1(settings_dic, @"Could not load plist '%@' while loading defaults.", plistFullName);
return nil;
}
NSArray *preferences = [settings_dic objectForKey:@"PreferenceSpecifiers"];
NSAssert1(preferences, @"Could not find preferences entry in plist '%@' while loading defaults.", plistFullName);
NSMutableDictionary *defaults = [NSMutableDictionary dictionary];
for(NSDictionary *prefSpecification in preferences) {
NSString *key = [prefSpecification objectForKey:@"Key"];
if (key) {
id value = [prefSpecification objectForKey:@"DefaultValue"];
if(value) {
[defaults setObject:value forKey:key];
NSLog(@"setting %@ = %@",key,value);
}
}
NSString *type = [prefSpecification objectForKey:@"Type"];
if ([type isEqualToString:@"PSChildPaneSpecifier"]) {
NSString *file = [prefSpecification objectForKey:@"File"];
NSAssert1(file, @"Unable to get child plist name from plist '%@'", plistFullName);
if (file) {
[defaults addEntriesFromDictionary:[self defaultsFromPlistNamed:file]];
}
}
}
return defaults;
}
- (void)registerDefaultsFromSettingsBundle {
[[NSUserDefaults standardUserDefaults] registerDefaults:[self defaultsFromPlistNamed:@"Root"]];
}
调用[self-registerDefaultsFromSettingsBundle]代码>来自-(BOOL)应用程序:(UIApplication*)应用程序使用选项完成启动:(NSDictionary*)启动选项
if(x){NSAssert(x);return nil;}
看起来很蠢,但我懒得做点什么。另一种方法:代码生成
下面生成一个Objective-C文件,其中包含一个注册Root.plist默认值的函数
xsltproc settings.xslt Settings.bundle/Root.plist > registerDefaults.m
可以使用XCode中的“运行脚本”构建阶段自动运行。该阶段应放在“编译源代码”之前。(xsltproc随OS X提供。)
这有点基本,不处理嵌套文件,但可能有人使用它
settings.xslt
@“是的”,
@“不”,
@"",
@"",
无效注册表默认值(){
NSDictionary*默认值=
[NSDictionary Dictionary WithObjects和Keys:
零];
[[NSUserDefaults standardUserDefaults]注册表默认值:默认值];
}
这是基于的工作。以下是Swift版本:
请从以下地址拨打:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
self.registerDefaultsFromSettingsBundle()
return true
}
转换函数:
func registerDefaultsFromSettingsBundle(){
//NSLog("Registering default values from Settings.bundle");
let defs: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defs.synchronize()
var settingsBundle: NSString = NSBundle.mainBundle().pathForResource("Settings", ofType: "bundle")!
if(settingsBundle.containsString("")){
NSLog("Could not find Settings.bundle");
return;
}
var settings: NSDictionary = NSDictionary(contentsOfFile: settingsBundle.stringByAppendingPathComponent("Root.plist"))!
var preferences: NSArray = settings.objectForKey("PreferenceSpecifiers") as NSArray
var defaultsToRegister: NSMutableDictionary = NSMutableDictionary(capacity: preferences.count)
for prefSpecification in preferences {
if (prefSpecification.objectForKey("Key") != nil) {
let key: NSString = prefSpecification.objectForKey("Key")! as NSString
if !key.containsString("") {
let currentObject: AnyObject? = defs.objectForKey(key)
if currentObject == nil {
// not readable: set value from Settings.bundle
let objectToSet: AnyObject? = prefSpecification.objectForKey("DefaultValue")
defaultsToRegister.setObject(objectToSet!, forKey: key)
NSLog("Setting object \(objectToSet) for key \(key)")
}else{
//already readable: don't touch
//NSLog("Key \(key) is readable (value: \(currentObject)), nothing written to defaults.");
}
}
}
}
defs.registerDefaults(defaultsToRegister)
defs.synchronize()
}
与Swift 2兼容的版本
func registerDefaultsFromSettingsBundle(){
let defaults = NSUserDefaults.standardUserDefaults()
defaults.synchronize()
let settingsBundle: NSString = NSBundle.mainBundle().pathForResource("Settings", ofType: "bundle")!
if(settingsBundle.containsString("")){
NSLog("Could not find Settings.bundle");
return;
}
let settings = NSDictionary(contentsOfFile: settingsBundle.stringByAppendingPathComponent("Root.plist"))!
let preferences = settings.objectForKey("PreferenceSpecifiers") as! NSArray;
var defaultsToRegister = [String: AnyObject](minimumCapacity: preferences.count);
for prefSpecification in preferences {
if (prefSpecification.objectForKey("Key") != nil) {
let key = prefSpecification.objectForKey("Key")! as! String
if !key.containsString("") {
let currentObject = defaults.objectForKey(key)
if currentObject == nil {
// not readable: set value from Settings.bundle
let objectToSet = prefSpecification.objectForKey("DefaultValue")
defaultsToRegister[key] = objectToSet!
NSLog("Setting object \(objectToSet) for key \(key)")
}
}
}
}
defaults.registerDefaults(defaultsToRegister)
defaults.synchronize()
}
更干净的swift 2.2版本需要对字符串进行快速扩展,以通过追加PathComponent恢复Strings:
extension String {
func stringByAppendingPathComponent(path: String) -> String {
let nsSt = self as NSString
return nsSt.stringByAppendingPathComponent(path)
}
}
func registerDefaultsFromSettingsBundle() {
guard let settingsBundle = NSBundle.mainBundle().pathForResource("Settings", ofType: "bundle") else {
log.debug("Could not find Settings.bundle")
return
}
let settings = NSDictionary(contentsOfFile: settingsBundle.stringByAppendingPathComponent("Root.plist"))!
let preferences = settings["PreferenceSpecifiers"] as! NSArray
var defaultsToRegister = [String: AnyObject]()
for prefSpecification in preferences {
guard let key = prefSpecification["Key"] as? String,
let defaultValue = prefSpecification["DefaultValue"] else {
continue
}
defaultsToRegister[key] = defaultValue
}
NSUserDefaults.standardUserDefaults().registerDefaults(defaultsToRegister)
}
Swift 3版本
func registerDefaultsFromSettingsBundle(){
guard let settingsBundle = Bundle.main.path(forResource: "Settings", ofType: "bundle") else {
print("Could not locate Settings.bundle")
return
}
guard let settings = NSDictionary(contentsOfFile: settingsBundle+"/Root.plist") else {
print("Could not read Root.plist")
return
}
let preferences = settings["PreferenceSpecifiers"] as! NSArray
var defaultsToRegister = [String: AnyObject]()
for prefSpecification in preferences {
if let post = prefSpecification as? [String: AnyObject] {
guard let key = post["Key"] as? String,
let defaultValue = post["DefaultValue"] else {
continue
}
defaultsToRegister[key] = defaultValue
}
}
UserDefaults.standard.register(defaults: defaultsToRegister)
}
我希望有一些我没有的神奇捆绑设置,比如“WriteDefaultsOnInstall”,但如果没有,这就可以了,谢谢:)这个解决方案需要注意一点——如果默认值是布尔值,它就不起作用,因为如果默认值设置为否或不存在,“if(!name)”将返回否。为了解决这个问题,我改用objectForKey,因为它将返回0、1或null。值得注意的是,registerDefaultsFromSettingsBundle
不需要限制为条件执行:它可以安全地一直运行,因为registerDefaults
从不覆盖现有设置;它只为没有值的设置提供默认值。但是,避免冗余执行可以节省(很少)一点时间。请注意,使用nil
键在DefaultStoreRegister上调用-setObject:
,将引发异常。如果Key
存在,但DefaultValue
不适用于给定的首选项,我相信使用上述代码会发生这种情况。例如,对于文本字段首选项(),这是有效的。我必须注意,这些东西不适用于本地化应用程序:它打开[settingsBundle stringByAppendingPathComponent:@“Root.plist”]
,而对于本地化应用程序,您需要localeid.lproj/Root.plist
。第二步,[DefaultStoreRegister setObject:…]
引发一个零值异常。“prefSpecification”可能没有键“DefaultValue”,因此objectToSet将为NULL。解决方案:-如果让objectToSet:AnyObject=prefSpecification.objectForKey(“DefaultValue”)作为AnyObject?---此代码在Swift 2中不起作用<代码>无法将类型“NSMutableDictionary”的值转换为预期的参数类型“[String:AnyObject]”
如何修复?现在执行此操作…:func registerDefaultsFromSettingsBundle(){//NSLog(“从Settings.bundle注册默认值”);let defs:NSUserDefaults=NSUserDefaults.standardUserDefaults()defs.synchronize()let settingsBundle:NSString=NSBundle.mainBundle().pathForResource(“设置”,类型:“bundle”)!if(settingsBundle.containssString(“”){NSLog(“找不到设置.bundle”);return;}let Settings:NSDictionary=NSDictionary(contentsOfFile:settingsBundle.stringByAppendingPathComponent(“Root.plist”)!让首选项:NSArray=settings.objectForKey(“首选项说明符”)作为首选项{if(prefS)中prefSpecification的!NSArray让DefaultStoreRegister:NSMutableDictionary=NSMutableDictionary(容量:preferences.count)
func registerDefaultsFromSettingsBundle(){
guard let settingsBundle = Bundle.main.path(forResource: "Settings", ofType: "bundle") else {
print("Could not locate Settings.bundle")
return
}
guard let settings = NSDictionary(contentsOfFile: settingsBundle+"/Root.plist") else {
print("Could not read Root.plist")
return
}
let preferences = settings["PreferenceSpecifiers"] as! NSArray
var defaultsToRegister = [String: AnyObject]()
for prefSpecification in preferences {
if let post = prefSpecification as? [String: AnyObject] {
guard let key = post["Key"] as? String,
let defaultValue = post["DefaultValue"] else {
continue
}
defaultsToRegister[key] = defaultValue
}
}
UserDefaults.standard.register(defaults: defaultsToRegister)
}