注意:这是针对引用类型的。

斯威夫特:4/5

print(Unmanaged.passUnretained(someVar).toOpaque())

打印someVar的内存地址。 (感谢@Ying)

斯威夫特3.1:

print(Unmanaged<AnyObject>.passUnretained(someVar as AnyObject).toOpaque())

打印someVar的内存地址。

就用这个吧:

print(String(format: "%p", object))

这是为了Swift 3。

像@CharlieMonroe一样，我想以整数形式获取地址。具体来说，我想要Thread对象的地址作为诊断日志记录模块中的线程ID，用于没有线程名可用的情况。

根据查理·门罗的代码，这是我目前想出的。但注意，我对霉霉很陌生，这可能不正确……

  // Convert the memory address of the current Thread object into an Int for use as a thread ID
  let objPtr = Unmanaged.passUnretained(Thread.current).toOpaque()
  let onePtr = UnsafeMutableRawPointer(bitPattern: 1)!  // 1 used instead of 0 to avoid crash
  let rawAddress : Int64 = onePtr.distance(to: objPtr) + 1  // This may include some high-order bits
  let address = rawAddress % (256 * 1024 * 1024 * 1024)  // Remove high-order bits

最后一条语句存在，因为如果没有它，我将获得像0x60000007DB3F这样的地址。最后一条语句中的模运算将其转换为0x7DB3F。

斯威夫特2

这现在是标准库的一部分:unsafeAddressOf。

/// Return an UnsafePointer to the storage used for `object`.  There's
/// not much you can do with this other than use it to identify the
/// object

斯威夫特3

对于Swift 3，使用withUnsafePointer:

var str = "A String"
withUnsafePointer(to: &str) {
    print(" str value \(str) has address: \($0)")
}

注意:这是针对引用类型的。

斯威夫特:4/5

print(Unmanaged.passUnretained(someVar).toOpaque())

打印someVar的内存地址。 (感谢@Ying)

斯威夫特3.1:

print(Unmanaged<AnyObject>.passUnretained(someVar as AnyObject).toOpaque())

打印someVar的内存地址。

在Swift4 about Array中:

    let array1 = [1,2,3]
    let array2 = array1
    array1.withUnsafeBufferPointer { (point) in
        print(point) // UnsafeBufferPointer(start: 0x00006000004681e0, count: 3)
    }
    array2.withUnsafeBufferPointer { (point) in
        print(point) // UnsafeBufferPointer(start: 0x00006000004681e0, count: 3)
    }