一、監(jiān)聽鍵盤出行和消失

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardHideOrShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardHideOrShow:) name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardHideOrShow:(NSNotification *)notification {
    NSString *notificationName = notification.name;     //獲取通知名稱
    NSDictionary *keyboardInfo = notification.userInfo;//獲取通知內(nèi)容
    /*
     NSLog(@"keyboardInfo: %@", keyboardInfo);
     鍵盤將要彈起時(shí)打印 keyboardInfo: {
     UIKeyboardAnimationCurveUserInfoKey = 7;
     UIKeyboardAnimationDurationUserInfoKey = "0.25";
     UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {414, 270}}";
     UIKeyboardCenterBeginUserInfoKey = "NSPoint: {207, 871}";
     UIKeyboardCenterEndUserInfoKey = "NSPoint: {207, 827}";
     UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 736}, {414, 270}}";
     UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 692}, {414, 270}}";
     UIKeyboardIsLocalUserInfoKey = 1;
     }
     鍵盤將要消失時(shí)打印 keyboardInfo: {
     UIKeyboardAnimationCurveUserInfoKey = 7;
     UIKeyboardAnimationDurationUserInfoKey = "0.25";
     UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {414, 270}}";
     UIKeyboardCenterBeginUserInfoKey = "NSPoint: {207, 827}";
     UIKeyboardCenterEndUserInfoKey = "NSPoint: {207, 871}";
     UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 692}, {414, 270}}";
     UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 736}, {414, 270}}";
     UIKeyboardIsLocalUserInfoKey = 1;
     }
     */
    CGRect keyboardFrame = [keyboardInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];     
    //keyboardFrame.size.height 為鍵盤的高度
    if ([notificationName isEqualToString:UIKeyboardWillHideNotification]) {
        //鍵盤將要消失
    }
    else {
        //鍵盤將要彈起
    }
}

二、禁止UIWebView隨鍵盤的彈起而往上滾動 借鑒于此，謝謝

問題:當(dāng)UIWebView中的html有輸入框,點(diǎn)擊輸入框，UIWebView會隨鍵盤的彈起而整體往上移動,收起鍵盤后,UIWebView無法回到原來的位置;
問題的原因:由于UIWebView繼承的是UIScrollerView,因此,當(dāng)鍵盤彈起時(shí),UIScrollerView的content會整體往上移動;

解決問題的方案:
<UIScrollViewDelegate>
_webView.scrollView.delegate = self;
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return nil;
}