我正在制作一个包含多个的应用程序,UITextField
并且UITextView
TheUITextView
位于屏幕底部,每当键入开始时,键盘都会阻止UITextView
当键盘出现在屏幕上时,我将如何向上移动表单的视图?然后当键盘消失时再次向下移动?
我正在制作一个包含多个的应用程序,UITextField
并且UITextView
TheUITextView
位于屏幕底部,每当键入开始时,键盘都会阻止UITextView
当键盘出现在屏幕上时,我将如何向上移动表单的视图?然后当键盘消失时再次向下移动?
最好的答案是尽量避免这样做。
但是,如果您将内容放在 UIScrollView 或 UITableView 中,您可以在输入成为第一响应者时滚动到输入。
确保在你的类中实现 UITextFieldDelegate。这些委托方法应该对名为 activeField 的文本字段起作用:
- (void)viewDidLoad
{
[super viewDidLoad];
[activeField setDelegate:self];
[self configureView];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return TRUE;
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y-kbSize.height);
[scrollView setContentOffset:scrollPoint animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
我喜欢用这个:https ://github.com/michaeltyson/TPKeyboardAvoiding 它对我来说非常好用,而且很容易使用。