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有什么優美的方法可以將鈎子方法還原為iOS上的原始實現?

[英]Is there any graceful way could revert the hooked method to original implementation on iOS?

使用CydiaSubstrate我們可以輕松地鈎住以下方法,但是我想知道如何卸載鈎子並將實現還原為原始方法? 謝謝!

static IMP original_UIView_setFrame_;
void replaced_UIView_setFrame_(UIView* self, SEL _cmd, CGRect frame) {  // Note the implicit self and _cmd parameters are needed explicitly here.
  CGRect originalFrame = self.frame;
  NSLog("Changing frame of %p from %@ to %@", self, NSStringFromCGRect(originalFrame), NSStringFromCGRect(frame));
  original_UIView_setFrame_(self, _cmd, frame);    // Remember to pass self and _cmd.
}
...
MSHookMessageEx([UIView class], @selector(setFrame:), (IMP)replaced_UIView_setFrame_, (IMP *)&original_UIView_setFrame_);

您只需要再次交換實現,即再次調用以下命令:

MSHookMessageEx([UIView class], @selector(setFrame:), (IMP)replaced_UIView_setFrame_, (IMP *)&original_UIView_setFrame_);

交換實現時,您將在周圍交換它們,因此,通過再次交換它們,您將回到原始狀態。

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