objective-c - 编辑外部属性列表 (.plist)

Question

这是我的代码:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Insert code here to initialize your application

}

- (IBAction)unlockIt:(id)sender {

    if ([[appField stringValue] length] < 1) {
        [status setTextColor:[NSColor redColor]];
        [status setStringValue:@"error with name"];
    }
    else {
        [status setStringValue:@""];
        [status setTextColor:[NSColor greenColor]];

        NSString *path = [NSString stringWithFormat:@"/Applications/%@.app/Contents", [appField stringValue]];

        NSBundle *bundle = [NSBundle bundleWithPath:path]; 

        NSString *infoPlist = [bundle pathForResource:@"Info" ofType:@"plist"];

        NSString *randomIdentifier = [NSString stringWithFormat:@"com.derp.%i", arc4random()];

        [infoPlist setValue:randomIdentifier forKey:@"Bundle identifier"];

        [status setStringValue:@"attempt successful"];
    }
}

我收到此错误:

[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key Bundle identifier.

我该如何解决这个问题？

Answer 1

key 不是“ bundle 标识符”——这是 key 的友好表示。

实际的键是“CFBundleIdentifier”，并且有一个 CFStringRef 常量，您可以将其转换为 NSString:

(NSString *)kCFBundleIdentifierKey

<小时/>

编辑:您的代码存在更多问题:

NSString *infoPlist = [bundle pathForResource:@"Info" ofType:@"plist"];
[infoPlist setValue:randomIdentifier forKey:@"Bundle identifier"];

infoPlist 是一个字符串，其中包含应用程序包内 Info.plist 文件的文件路径。它不是 plist 本身。您需要将 Info.plist 读入字典，更改其内容，然后再次写入。例如:

NSString *infoPlistPath = [bundle pathForResource:@"Info" ofType:@"plist"];
NSMutableDictionary *infoPlist = [NSDictionary dictionaryWithContentsOfFile:infoPlistPath];
[infoPlist setObject:randomIdentifier forKey:(NSString *)kCFBundleIdentifierKey];
[infoPlist writeToFile:infoPlistPath atomically:YES];