Question

我正在尝试使用app的目录获取bundleID，我收到一个错误消息： EXC_BAD_ACCESS（代码= 1，地址= 0xd8）

application.directory！是一个字符串

let startCString = (application.directory! as NSString).UTF8String //Type: UnsafePointer<Int8>
let convertedCString = UnsafePointer<UInt8>(startCString) //CFURLCreateFromFileRepresentation needs <UInt8> pointer
let length = application.directory!.lengthOfBytesUsingEncoding(NSUTF8StringEncoding)
let dir = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, convertedCString, length, false)
let bundle = CFBundleCreate(kCFAllocatorDefault, dir)
let result = CFBundleGetIdentifier(bundle)

我在结果行上收到此错误。

我在这里做错了什么？

Answer 1

代码的一个潜在问题是在

中获得指针

let startCString = (application.directory! as NSString).UTF8String //Type: UnsafePointer<Int8>

仅当临时 NSString存在时，

才有效。但那转换为C字符串可以由编译器“自动”完成（比较Colorbox: DON't close #colorbox on click within #colorbox inside #cboxOverlay），这是一个有效的版本应该是

let dir = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, path, Int(strlen(path)), false)
let bundle = CFBundleCreate(kCFAllocatorDefault, dir)
let result = CFBundleGetIdentifier(bundle)

但你可以简单地创建一个NSBundle 从给定路径获取其标识符：

let ident = NSBundle(path: path)!.bundleIdentifier!

添加错误检查的完整示例：

let path = "/Applications/TextEdit.app"

if let bundle = NSBundle(path: path) {
    if let ident = bundle.bundleIdentifier {
        print(ident) // com.apple.TextEdit
    } else {
        print("bundle has no identifier")
    }
} else {
    print("bundle not found")
}

Answer 2

如果您尝试以编程方式获取它，可以使用以下代码行：

目标-C：

NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];

Swift 3.0：

let bundleIdentifier =  Bundle.main.bundleIdentifier
Updated for latest swift It will work for both iOS and Mac apps.

了解更多信息，请点击此处：

Apple Docs： https://developer.apple.com/documentation/foundation/bundle#//apple_ref/occ/instm/NSBundle/bundleIdentifier

在Swift中获取bundle标识符

2 个答案: