当我的用户输入我的textview时,我希望textview向上移动,以便键盘不会覆盖它。我使用下面的代码,但没有任何东西向上移动,键盘继续覆盖我的textview。我该如何解决这个问题?
的 ViewController.h
@property (strong, nonatomic) IBOutlet UITextView *replyField;
ViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
[self.replyField setReturnKeyType:UIReturnKeyDefault];
}
- (void)dismissKeyboard
{
[self.replyField resignFirstResponder];
}
- (void)textViewDidBeginEditing:(UITextView *)textView
{
[self animateTextView: YES];
}
- (void)textViewDidEndEditing:(UITextView *)textView
{
[self animateTextView:NO];
}
- (void) animateTextView:(BOOL) up
{
const int movementDistance = -250; // 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];
}
答案 0 :(得分:0)
在animateTextView
方法中看到有2个错误:
原始值-250导致(up ? -movementDistance : movementDistance)
self.view.frame = CGRectOffset(self.inputView.frame, 0, movement);
将改变self.view的框架,而不是textView的。
改进(在我的Xcode中测试的代码):
- (void)textViewDidBeginEditing:(UITextView *)textView{
[self animateTextView:textView isUp:YES];
}
- (void)textViewDidEndEditing:(UITextView *)textView{
[self animateTextView:textView isUp:NO];
}
- (void)animateTextView:(UITextView *)textView isUp:(BOOL)up{
const int movementDistance = 250; // tweak as needed
const float movementDuration = 0.3f; // tweak as needed
int movement = (up ? -movementDistance : movementDistance);
NSLog(@"%d",movement);
[UIView beginAnimations: @"anim" context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
textView.frame = CGRectOffset(textView.frame, 0, movement);
[UIView commitAnimations];
}
//To close keyboard when click Return key.
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if ([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
和@El Tomato说的一样,记得为textView设置委托:
[self.replyField setDelegate:self];