I'm using the code from this Gist to determine which iOS device (eg iPhone5,1
) my app is running on:
- (NSString *)platform
{
size_t size;
sysctlbyname("hw.machine", NULL, &size, NULL, 0);
char *machine = malloc(size);
sysctlbyname("hw.machine", machine, &size, NULL, 0);
NSString *platform = [NSString stringWithUTF8String:machine];
free(machine);
return platform;
}
The Swift documentation indicates that C data types are well-supported, but it doesn't say anything about C functions. Is there a pure Swift way to retrieve the machine identifier, or will I have to bridge into Objective-C for this?
You can do the same in Swift (error checking omitted for brevity):
func platform() -> String {
var size : Int = 0 // as Ben Stahl noticed in his answer
sysctlbyname("hw.machine", nil, &size, nil, 0)
var machine = [CChar](count: size, repeatedValue: 0)
sysctlbyname("hw.machine", &machine, &size, nil, 0)
return String.fromCString(machine)!
}
Update for Swift 3:
func platform() -> String {
var size = 0
sysctlbyname("hw.machine", nil, &size, nil, 0)
var machine = [CChar](repeating: 0, count: size)
sysctlbyname("hw.machine", &machine, &size, nil, 0)
return String(cString: machine)
}
As of Swift 1.2 (Xcode 6.3 beta-2), @MartinR's code above needs to be modified slightly. sysctlbyname needs a CChar array (ie C string) for the first parameter, and an Int (instead of Uint) for the "size" parameter.
func platformModelString() -> String? {
if let key = "hw.machine".cString(using: String.Encoding.utf8) {
var size: Int = 0
sysctlbyname(key, nil, &size, nil, 0)
var machine = [CChar](repeating: 0, count: Int(size))
sysctlbyname(key, &machine, &size, nil, 0)
return String(cString: machine)
}
return nil
}
EDIT: Updated 2017-01-04 for Swift 3 syntax
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.