KeyBoard 在iOS7和iOS8上通知的区别

首先注册通知如下：

            NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name:UIKeyboardWillChangeFrameNotification, object:nil)

打印内容如下：

注明：这是iPad横向的时候哦。

iOS7.1:键盘响应，弹起

{

    UIKeyboardAnimationCurveUserInfoKey = 7;

    UIKeyboardAnimationDurationUserInfoKey = "0.25";

    UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {1024, 406}}";

    UIKeyboardCenterBeginUserInfoKey = "NSPoint: {512, 971}";

    UIKeyboardCenterEndUserInfoKey = "NSPoint: {512, 565}";

    UIKeyboardFrameBeginUserInfoKey = "NSRect: {{-406, 0}, {406, 1024}}";

    UIKeyboardFrameChangedByUserInteraction = 0;

    UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 0}, {406, 1024}}";

}

键盘响应，收回resignFirstResponder

UIKeyboardWillChangeFrameNotification; userInfo = {

    UIKeyboardAnimationCurveUserInfoKey = 7;

    UIKeyboardAnimationDurationUserInfoKey = "0.25";

    UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {1024, 406}}";

    UIKeyboardCenterBeginUserInfoKey = "NSPoint: {512, 565}";

    UIKeyboardCenterEndUserInfoKey = "NSPoint: {512, 971}";

    UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 0}, {406, 1024}}";

    UIKeyboardFrameChangedByUserInteraction = 0;

    UIKeyboardFrameEndUserInfoKey = "NSRect: {{-406, 0}, {406, 1024}}";

}

{

    UIKeyboardAnimationCurveUserInfoKey = 7;

    UIKeyboardAnimationDurationUserInfoKey = "0.25";

    UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {1024, 406}}";

    UIKeyboardCenterBeginUserInfoKey = "NSPoint: {512, 971}";

    UIKeyboardCenterEndUserInfoKey = "NSPoint: {512, 565}";

    UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 768}, {1024, 406}}";

    UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 362}, {1024, 406}}";

}

{

    UIKeyboardAnimationCurveUserInfoKey = 7;

    UIKeyboardAnimationDurationUserInfoKey = "0.25";

    UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {1024, 406}}";

    UIKeyboardCenterBeginUserInfoKey = "NSPoint: {512, 565}";

    UIKeyboardCenterEndUserInfoKey = "NSPoint: {512, 971}";

    UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 362}, {1024, 406}}";

    UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 768}, {1024, 406}}";

}

KeyBoard 在iOS7和iOS8上通知的区别

原文：http://blog.csdn.net/yanyanforest/article/details/44803503