ios - NSDictionary 在 Objective-C 中设置 Bundle 为空

Question

我在设置中有 textFields，我可以从中获取值。每当我尝试从 PSMultiValueSpecifier 获取字典时，它总是空的。即使我在设置包中选择它仍然为空，我可以理解它的 null util 用户进行了选择但它一直保持为空。

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-               1.0.dtd">
<plist version="1.0">
<dict>
<key>PreferenceSpecifiers</key>
<array>
    <dict>
        <key>Title</key>
        <string>Please Select Orientation</string>
        <key>Type</key>
        <string>PSGroupSpecifier</string>
    </dict>
    <dict>
        <key>Type</key>
        <string>PSToggleSwitchSpecifier</string>
        <key>Title</key>
        <string>Landscape</string>
        <key>Key</key>
        <string>orientationSwitch</string>
        <key>DefaultValue</key>
        <true/>
    </dict>
    <dict>
        <key>Type</key>
        <string>PSGroupSpecifier</string>
        <key>Title</key>
        <string>Select Board</string>
    </dict>
    <dict>
        <key>Type</key>
        <string>PSTextFieldSpecifier</string>
        <key>Title</key>
        <string></string>
        <key>Key</key>
        <string>boardTextField</string>
    </dict>
    <dict>
        <key>Type</key>
        <string>PSMultiValueSpecifier</string>
        <key>Title</key>
        <string>Select Board</string>
        <key>Key</key>
        <string>boardChoice</string>
        <key>DefaultValue</key>
        <string>1</string>
        <key>Titles</key>
        <array>
            <string>Glass</string>
            <string>Welcome</string>
            <string>Mate</string>
        </array>
        <key>Values</key>
        <array>
            <string>0</string>
            <string>1</string>
            <string>2</string>
        </array>
    </dict>
</array>
<key>StringsTable</key>
<string>Root</string>
 </dict>
 </plist>

这是我获得值(value)的方式。

 NSDictionary *boardChoice = [defaults dictionaryForKey:@"boardChoice"];
 NSLog(@"board Choice = %@", boardChoice);

谢谢

Answer 1

“PSMultiValueSpecifier”类型的首选项不会在用户默认值，但可能的“值”之一。所以

NSString *boardChoice = [defaults stringForKey:@"boardChoice"];

应该有效，在您的情况下应该返回“0”、“1”或“2”。