我正在使用UITextField来接收用户输入。但是,由于我的文本字段朝向笔尖的中间/底部,因此当键盘弹出时会隐藏它。有没有什么方法可以将它与键盘一起滑动,以便在选择时它位于键盘的顶部?此外,由于我也在使用数字键盘,是否有一种简单的方法可以在某处包含完成按钮?
感谢您的帮助。
答案 0 :(得分:26)
我已经为这个问题做了一个简单的应用程序。它会自动检查Textfield的位置,如果键盘隐藏它,它会根据需要自动向上移动。
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[self animateTextField:textField up:YES];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
[self animateTextField:textField up:NO];
}
- (void) animateTextField: (UITextField*) textField up: (BOOL) up
{
int animatedDistance;
int moveUpValue = textField.frame.origin.y+ textField.frame.size.height;
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait ||
orientation == UIInterfaceOrientationPortraitUpsideDown)
{
animatedDistance = 216-(460-moveUpValue-5);
}
else
{
animatedDistance = 162-(320-moveUpValue-5);
}
if(animatedDistance>0)
{
const int movementDistance = animatedDistance;
const float movementDuration = 0.3f;
int movement = (up ? -movementDistance : movementDistance);
[UIView beginAnimations: nil context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
self.view.frame = CGRectOffset(self.view.frame, 0, movement);
[UIView commitAnimations];
}
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
答案 1 :(得分:17)
要在键盘出现时滚动,我喜欢Cocoa With Love的this tutorial。
要关闭数字键盘,您可以put a custom "Done" button on the keypad或在屏幕的其余部分上隐藏按钮。我用代码完成了后者,但是this tutorial使用了Interface Builder。
答案 2 :(得分:3)
您必须手动执行此操作。看看这个答案。 UITextField: move view when keyboard appears
答案 3 :(得分:3)
使用此代码:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:self.view.window];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification
object:self.view.window];
}
- (void)viewDidDisappear:(BOOL)animated {
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidHideNotification
object:nil];
}
- (void)keyboardDidHide:(NSNotification *)n
{
CGRect viewFrame = scrollView.frame;
UIDeviceOrientation orientSide = [[UIDevice currentDevice] orientation];
if ((orientSide == UIDeviceOrientationLandscapeRight) || (orientSide == UIDeviceOrientationLandscapeLeft))
viewFrame.size.height += 140;
else viewFrame.size.height += 216; //portrait mode
scrollView.frame = viewFrame;
keyboardVisible = NO;
}
- (void)keyboardDidShow:(NSNotification *)n
{
CGRect viewFrame = scrollView.frame;
UIDeviceOrientation orientSide = [[UIDevice currentDevice] orientation];
if ((orientSide == UIDeviceOrientationLandscapeRight) || (orientSide == UIDeviceOrientationLandscapeLeft))
viewFrame.size.height -= 140;
else viewFrame.size.height -= 216; //portrait mode
scrollView.frame = viewFrame;
keyboardVisible = YES; }
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
CGRect viewFrame = scrollView.frame;
if ((interfaceOrientation == UIDeviceOrientationLandscapeRight) || (interfaceOrientation == UIDeviceOrientationLandscapeLeft)) //wants to change to landscape mode
if (keyboardVisible == NO)//currently in portrait,check if keyboard was present
viewFrame.size = CGSizeMake(480,250);
else viewFrame.size = CGSizeMake(480,170);
else {//wants to change to portrait mode
if (keyboardVisible == NO)//currently in landscape,check if keyboard was present
viewFrame.size = CGSizeMake(320,416);
else viewFrame.size = CGSizeMake(320,200);
}
scrollView.frame = viewFrame;
return YES;
}
也适用于横向模式,但仅适用于iphone。对于iPad,请相应更改框架设置。按下返回时,textFieldShouldReturn:
方法将使键盘隐藏。希望这会有所帮助...
答案 4 :(得分:3)
下面的代码非常适合我。
[textFieldFocused becomeFirstResponder];
[self.view addSubview:startView];
[textFieldFocused resignFirstResponder];
答案 5 :(得分:3)
如果有人需要,我已将ValayPatel的解决方案翻译成swift
func animatedTextField(textField: UITextField, up: Bool){
var animatedDistance : Int = 0
let moveUpValue : Int = Int(textField.frame.origin.y) + Int(textField.frame.size.height)
switch UIDevice.currentDevice().orientation {
case .Portrait , .PortraitUpsideDown:
animatedDistance = 216 - (460 - moveUpValue - 5)
default:
animatedDistance = 162 - (320 - moveUpValue - 5)
}
if (animatedDistance > 0 ){
let movementDistance : Int = animatedDistance
let movementDuration : Float = 0.3
let movement = up ? -movementDistance : movementDistance
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(NSTimeInterval(movementDuration))
self.view.frame = CGRectOffset(self.view.frame, 0, CGFloat(movement))
UIView.commitAnimations()
}
}
答案 6 :(得分:1)
这种情况在iPhone上很糟糕。您应该做的是设计界面,使键盘出现时字段可见,或者在键盘出现时将字段向上移动。 (当你完成时退缩)
我建议您查看一些Apple应用,例如“通讯录”或“设置”,了解他们如何处理此问题。
另外,我确定iPhone HIG有话要说。
答案 7 :(得分:0)
我知道我回答这个问题的时间有点迟,但我找到了一个非常简单的解决方案。如果您使用UITableView控制器而不是具有tableView作为对象的UIViewController,则不会出现此问题。
当您单击表格底部的文本字段时,键盘会弹出,表格视图会自动向上滚动,直到可以看到正在编辑的文本字段。
但是,当我们使用键盘上的返回按钮时,自动滚动功能不起作用。在这种情况下,我们手动滚动表格以查看文本字段。
我希望这会有所帮助
答案 8 :(得分:0)
我一直在搜索类似问题的无数答案。对于基本的单屏应用程序,此解决方案就像魅力一样,实现起来非常简单:https://github.com/michaeltyson/TPKeyboardAvoiding
当然有更优雅的解决方案,但这将完成工作并快速完成。
答案 9 :(得分:0)
将UITableView设置为编辑模式很简单!
- (void)viewDidLoad {
[super viewDidLoad];
[self.tableView setEditing:YES];
}
如果你想在一个单元格的左边隐藏一个删除冒泡,那么实现一个UITableViewDelegate方法:
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return NO;
}
答案 10 :(得分:0)
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog(@"%f",textField.frame.origin.y);
CGPoint scrollPoint = CGPointMake(0, textField.frame.origin);
[scrollView setContentOffset:scrollPoint animated:YES];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
[scrollView setContentOffset:CGPointZero animated:YES];
}
答案 11 :(得分:0)
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[self animateTextField:textField up:YES];
}
请在您的视图controller.m文件中使用此代码。当您单击文本字段时,使用此代码键盘将出现。当您单击视图时,键盘将隐藏..我希望这对您有所帮助。 ..