文本框被键盘隐藏

我用registry格做了一个应用程序。 当选中此格式的文本框时，软键盘将隐藏该文本框。 如果我离开它，因为它是用户无法看到他在input时input。

Answer 1

这是旧的方法，但每次都正常工作

在你的.h文件中

@interface signupViewController : UIViewController { CGFloat animatedDistance; } 

.m文件

 static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3; static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2; static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8; static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216; -(void)textFieldDidBeginEditing:(UITextField *)textField { CGRect textFieldRect = [self.view.window convertRect:textField.bounds fromView:textField]; CGRect viewRect = [self.view.window convertRect:self.view.bounds fromView:self.view]; CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height; CGFloat numerator = midline - viewRect.origin.y - MINIMUM_SCROLL_FRACTION * viewRect.size.height; CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) * viewRect.size.height; CGFloat heightFraction = numerator / denominator; if (heightFraction < 0.0) { heightFraction = 0.0; } else if (heightFraction > 1.0) { heightFraction = 1.0; } animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction); CGRect viewFrame = self.view.frame; viewFrame.origin.y -= animatedDistance; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; [self.view setFrame:viewFrame]; [UIView commitAnimations]; } - (void)textFieldDidEndEditing:(UITextField *)textField { CGRect viewFrame = self.view.frame; viewFrame.origin.y += animatedDistance; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; [self.view setFrame:viewFrame]; [UIView commitAnimations]; } 

Answer 2

尝试这可能是有益的..

 - (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 movementDistance = -100; // tweak as needed float movementDuration = 0.3f; // tweak as needed int movement = (up ? movementDistance : -movementDistance); [UIView beginAnimations: @"animateTextField" context: nil]; [UIView setAnimationBeginsFromCurrentState: YES]; [UIView setAnimationDuration: movementDuration]; self.view.frame = CGRectOffset(self.view.frame, 0, movement); [UIView commitAnimations]; }