調用在python secitemcopymatching

Question

搭售來讀取鑰匙扣使用python（新手在Mac的Python）的項目

這是我有黑客在googlepedia發現

from ctypes import CDll, byref, Structure, POINTER 
from Foundation import NSDictionary 
class OpaqueObject: 
    pass 
OpaquePtr = POINTER(OpaqueObject) 
Security = CDLL('/System/Library......../Security') 
query = NSDictionary.dictionaryWithDictionary({<still working on this part>}) 
items = OpauePtr() 
Security.SecItemCopyMatching(query, byref(items)) 

在一起幾件事情{仍在研究這部分}，當前讀取{「foo」：「bar」}這當然是一個無效的查詢，但它至少應該運行

無論如何它失敗的SecItemCopyMatching調用說它不知道如何轉換param1。我知道該函數被定義爲採用CFDictionary，但我希望免費橋接接受NSDictionary

無論如何，我懷疑這是所有v壞的代碼混合2 mac python機制ctypes和PyObjc。

Answer 1

免費橋接不適用於Python​​。考慮使用CFDictionary代替：

CoreFoundation = CDLL('/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation') 

CoreFoundation.CFDictionaryCreateMutable.restype = OpaquePtr 
CoreFoundation.CFStringCreateWithBytes.restype = OpaquePtr 
def CFDictionaryAddStringKeyValue(d, k, v): 
    ck = CoreFoundation.CFStringCreateWithBytes(None, k, len(k), 0, 0) 
    cv = CoreFoundation.CFStringCreateWithBytes(None, v, len(v), 0, 0) 
    CoreFoundation.CFDictionaryAddValue(d, ck, cv) 
    CoreFoundation.CFRelease(ck) 
    CoreFoundation.CFRelease(cv) 

query = CoreFoundation.CFDictionaryCreateMutable(None, 0, None, None) 
CFDictionaryAddStringKeyValue(query, "foo", "bar") 

然後，你可以通過query爲SecItemCopyMatching。