当您开始输入某些值时,如何将 UITextView 向上或向下移动?就像在TextField中我们使用其委托方法一样。那么在 UITextView 的情况下应该怎么办呢?
当您开始输入某些值时,如何将 UITextView 向上或向下移动?就像在TextField中我们使用其委托方法一样。那么在 UITextView 的情况下应该怎么办呢?
编辑时,完整视图会向上移动,编辑完成后会向下移动...
- (void)textViewDidBeginEditing:(UITextView *)textView
{
[self animateTextView: YES];
}
- (void)textViewDidEndEditing:(UITextView *)textView
{
[self animateTextView:NO];
}
- (void) animateTextView:(BOOL) up
{
const int movementDistance =heightKeyboard; // tweak as needed
const float movementDuration = 0.3f; // tweak as needed
int movement= movement = (up ? -movementDistance : movementDistance);
NSLog(@"%d",movement);
[UIView beginAnimations: @"anim" context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
self.view.frame = CGRectOffset(self.inputView.frame, 0, movement);
[UIView commitAnimations];
}
我希望这能对你有所帮助...
我通过更改框架来实现。
-(void)textViewDidBeginEditing:(UITextView *)textView{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:viewMsg cache:YES];
viewMsg.frame = CGRectMake(10, 50, 300, 200);
[UIView commitAnimations];
NSLog(@"Started editing target!");
}
-(void)textViewDidEndEditing:(UITextView *)textView
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:viewMsg cache:YES];
viewMsg.frame = CGRectMake(10, 150, 300, 200);
[UIView commitAnimations];
}
#define kOFFSET_FOR_KEYBOARD 80.0
-(void)keyboardWillShow {
// Animate the current view out of the way
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
[self setViewMovedUp:NO];
}
}
-(void)keyboardWillHide {
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
[self setViewMovedUp:NO];
}
}
-(void)textFieldDidBeginEditing:(UITextField *)sender
{
if ([sender isEqual:mailTf])
{
//move the main view, so that the keyboard does not hide it.
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
}
}
//method to move the view up/down whenever the keyboard is shown/dismissed
-(void)setViewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
CGRect rect = self.view.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
rect.size.height += kOFFSET_FOR_KEYBOARD;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
self.view.frame = rect;
[UIView commitAnimations];
}
- (void)viewWillAppear:(BOOL)animated
{
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)viewWillDisappear:(BOOL)animated
{
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
试一下这段代码......
textFieldDidBecomeActive
> 根据需要移动文本框。 - user2638922