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  • 第11月第31天 keyboardwillshow CGAffineTransformMakeTranslation

    1.

    - (void)dealloc
    {
        [[NSNotificationCenter defaultCenter] removeObserver:self];
    }
    
    - (void)registerNotification {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKeyboard:) name:UIKeyboardWillShowNotification object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(hideKeyboard:) name:UIKeyboardWillHideNotification object:nil];
    }
    
    #pragma mark - keyboard
    - (void)showKeyboard:(NSNotification *)noti {
        NSDictionary *info=[noti userInfo];
        
        NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
        UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;
        
        CGRect keyboardRect = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue];
        CGFloat keyboardHeight = MIN(CGRectGetWidth(keyboardRect), CGRectGetHeight(keyboardRect));
        
        [UIView animateWithDuration:duration delay:0 options:options animations:^{
            CGFloat compareH = self.tableView.contentSize.height -(self.view.height - 45 - 64 - keyboardHeight);
            if (compareH >  0) {
                if (compareH < keyboardHeight) {
                    self.tableView.transform = CGAffineTransformMakeTranslation(0, -compareH);
                } else {
                    self.tableView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);
                }
            }
            
            self.bottomView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);
            
        } completion:nil];
    }
    
    - (void)hideKeyboard:(NSNotification *)noti {
        
        NSDictionary *info=[noti userInfo];
        
        NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
        UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;
        
        [UIView animateWithDuration:duration delay:0 options:options animations:^{
            
            self.tableView.transform = CGAffineTransformIdentity;
            self.bottomView.transform = CGAffineTransformIdentity;
            
        } completion:nil];
        
    }
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  • 原文地址:https://www.cnblogs.com/javastart/p/7457470.html
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