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：]：此类不是密钥值编码兼容的密钥Bundle标识符。

我该如何解决这个问题？

Answer 1

密钥不是'Bundle identifier' - 这是密钥的友好表示。

实际的密钥是'CFBundleIdentifier'，并且它有一个CFStringRef常量可以转换为NSString：

(NSString *)kCFBundleIdentifierKey

修改：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，包含应用程序包内Info.plist文件的文件路径。这不是plist本身。您需要将Info.plist读入字典，更改其内容，然后再次编写。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];

编辑外部属性列表（.plist）

1 个答案: