看了其他人的博客,根據需求寫的:

要實現的效果就是,如果鍵盤遮住的輸入框,那么要把view上移,所以需要拿到當前輸入框的位置,控制器實現UITextFiled的代理,有一個代理方法

//開始編輯
- (void)textFieldDidBeginEditing:(UITextField*)textField
{
    self.tempTextField = textField;
}

當點擊輸入框的時候,拿到這個輸入框,變成全局變量,在通知的觸發事件里面,進行比較,如果遮住了,就需要view上移一段距離(根據需求調節),當鍵盤需要消失的時候,還需要把view整體降下來

1.首先注冊兩個通知,監聽鍵盤出現和消失

//注冊通知
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

2.接著實現通知觸發事件

• 我在這里還定義了一個view的偏移量offsetY,方便鍵盤回收的時候,調節view的frame.
• 有一個問題就是如果輸入完之后,鍵盤沒回收,又點擊了另外一個輸入框,會出現問題,所以我需要做一個判斷,上一個鍵盤到底有沒有回收,如果沒有,我會先回收鍵盤,然后根據第二個鍵盤調節view

#pragma mark--通知事件
- (void)keyboardWillShow:(NSNotification*)noti
{
    //根據當前輸入框調整view
    CGFloat textFieldY = kScreenHigh - self.tempTextField.frame.origin.y;
    CGFloat textFieldHeight = self.tempTextField.frame.size.height;
    
    NSDictionary* info = [noti userInfo];
    CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    //鍵盤高度
    CGFloat keyboardHeight = keyboardSize.height;
//    NSLog(@"輸入框高度%f鍵盤高度%f",textFieldY - textFieldHeight,keyboardHeight);
    //在第二個鍵盤出來前,判斷上個鍵盤的偏移量 ,退回去
    if (self.offsetY > 0) {
        [UIView animateWithDuration:0.5f delay:0.f usingSpringWithDamping:10.f initialSpringVelocity:1.f options:UIViewAnimationOptionCurveEaseInOut animations:^{
            CGRect oldframe = self.view.frame;
            oldframe.origin.y += self.offsetY;
            self.view.frame = oldframe;
        } completion:nil];
        self.offsetY = 0;
    }
    //判斷鍵盤是否擋住輸入框
    if (keyboardHeight >= textFieldY) {
        // NSLog(@"輸入框高度%f鍵盤高度%f",textFieldY - textFieldHeight,keyboardHeight);
        //偏移量 保存下來
        self.offsetY = keyboardHeight - textFieldY + textFieldHeight;
        [UIView animateWithDuration:0.5f delay:0.f usingSpringWithDamping:10.f initialSpringVelocity:1.f options:UIViewAnimationOptionCurveEaseInOut animations:^{
            CGRect oldframe = self.view.frame;
            oldframe.origin.y -= self.offsetY;
            self.view.frame = oldframe;
        } completion:nil];
    }else{
        self.offsetY = 0;
    }
    
}

• 還有鍵盤消失的

- (void)keyboardWillHide:(NSNotification*)noti
{
    [UIView animateWithDuration:0.5f delay:0.f usingSpringWithDamping:10.f initialSpringVelocity:1.f options:UIViewAnimationOptionCurveEaseInOut animations:^{
        CGRect oldframe = self.view.frame;
        oldframe.origin.y += self.offsetY;
        self.view.frame = oldframe;
    } completion:nil];
    self.offsetY = 0;

}