iOS为什么将ToolBar的差距移到了键盘上 [英] iOS why has moved ToolBar gap to keyboard

问题描述

我想出了如何使用出现的键盘来移动带有按钮和文本字段的工具栏:

I figured out how to move my toolbar with button and text field with the appearing keyboard:

- (void) liftMainViewWhenKeybordAppears:(NSNotification*)aNotification
{
NSDictionary* userInfo = [aNotification userInfo];
NSTimeInterval animationDuration;
UIViewAnimationCurve animationCurve;
CGRect keyboardFrame;

[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
[[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
[[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] getValue:&keyboardFrame];


[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:animationCurve];    

[self.navigationController.toolbar setFrame:CGRectMake(self.navigationController.toolbar.frame.origin.x,
                                                       self.navigationController.toolbar.frame.origin.y - keyboardFrame.size.height +self.navigationController.toolbar.frame.size.height,
                                                       self.navigationController.toolbar.frame.size.width,
                                                       self.navigationController.toolbar.frame.size.height)];
[UIView commitAnimations];

}

一切正常，但移动的工具栏和键盘之间有一个小缝隙:

Everything works fine but there is a small gap between the moved toolbar and the keyboard:

我不知道是什么问题?可能是问题还是预期的行为?

and I can't figure out the problem? What could be the problem or is that the expected behavior?

谢谢！

推荐答案

请尝试以下操作来计算新的帧大小:

Try the following for calculating the new frame size:

CGRect kbFrameBegin;
[[userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] getValue: &kbFrameBegin];
CGRect kbFrameEnd;
[[userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] getValue: &kbFrameEnd];    
CGRect frame = self.navigationController.toolbar.frame;    
frame.size.height -= abs(kbFrameBegin.origin.y - kbFrameEnd.origin.y);
[self.navigationController.toolbar setFrame:frame];

这篇关于iOS为什么将ToolBar的差距移到了键盘上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！