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對於我爲iPad設計的應用程序，我有一個帶有一些文本字段/文本視圖的滾動視圖。爲了保持一切可見，我調整滾動視圖的contentSize屬性以在底部添加一個緩衝區，該緩衝區對應於鍵盤與滾動視圖重疊的程度。下面的代碼（有一些應用程序特定的東西在這裏，但我希望沒有這麼多，你無法理解它）：旋轉後獲得iPad屏幕鍵盤的大小
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc removeObserver:self name:nil object:nil];
}
- (void)keyboardWillShow:(NSNotification *)aNotification
{
NSValue *animationCurve = [[aNotification userInfo] valueForKey:UIKeyboardAnimationCurveUserInfoKey];
UIViewAnimationCurve curve;
[animationCurve getValue:&curve];
NSValue *animationDuration = [[aNotification userInfo] valueForKey:UIKeyboardAnimationDurationUserInfoKey];
NSTimeInterval duration;
[animationDuration getValue:&duration];
NSValue *endingFrame = [[aNotification userInfo] valueForKey:UIKeyboardFrameEndUserInfoKey];
CGRect frame;
[endingFrame getValue:&frame];
[UIView beginAnimations:@"keyboardWillShow" context:bodyView];
[UIView setAnimationCurve:curve];
[UIView setAnimationDuration:duration];
// Re-draw code here.
[UIView commitAnimations];
}
- (void)keyboardWillHide:(NSNotification *)aNotification
{
NSValue *animationCurve = [[aNotification userInfo] valueForKey:UIKeyboardAnimationCurveUserInfoKey];
UIViewAnimationCurve curve;
[animationCurve getValue:&curve];
NSValue *animationDuration = [[aNotification userInfo] valueForKey:UIKeyboardAnimationDurationUserInfoKey];
NSTimeInterval duration;
[animationDuration getValue:&duration];
[UIView beginAnimations:@"keyboardWillHide" context:bodyView];
[UIView setAnimationCurve:curve];
[UIView setAnimationDuration:duration];
// Re-draw code here
[UIView commitAnimations];
}
我的問題是：我該怎麼旋轉過程中做一下鍵盤的大小？ iPad旋轉時我沒有收到任何鍵盤通知，但鍵盤的大小有明顯變化。理想情況下，我只是通過鍵盤在橫向模式下重疊的量來調整contentSize屬性的高度，但我無法看到一種很好的方法，無需在兩個方向上對鍵盤的高度進行硬編碼，而我不會不想做。