Added _setDelegate to the common Objective-C selectors list and added a clarity wrapper function objc_setDelegate().

objc_darwin.go

@@ -34,6 +34,7 @@ var (
 	_release = sel_getUid("release")
 	_stringWithUTF8String = sel_getUid("stringWithUTF8String:")
 	_UTF8String = sel_getUid("UTF8String")
+	_setDelegate = sel_getUid("setDelegate:")
 )
 
 // some helper functions
@@ -64,6 +65,10 @@ func fromNSString(str C.id) string {
 	return C.GoString((*C.char)(unsafe.Pointer(cstr)))
 }
 
+func objc_setDelegate(obj C.id, delegate C.id) {
+	C.objc_msgSend_id(obj, _setDelegate, delegate)
+}
+
 /*
 These are wrapper functions for the functions in bleh_darwin.m to wrap around stdint.h type casting.
 */

uitask_darwin.go

@@ -97,7 +97,7 @@ func mainThread() {
 		return
 	}
 	appDelegate := objc_new(objc_getClass(_goAppDelegate))
-	C.objc_msgSend_id(_NSApp, _setDelegate, appDelegate)
+	objc_setDelegate(_NSApp, appDelegate)
 	// and that's it, really
 	C.objc_msgSend_noargs(_NSApp, _run)
 }