ios 弹出键盘挡住UITextView的解决方式

来源：http://2015.iteye.com/blog/1325291

 

有一个320*480的UITextView，点击UITextView的时候，下面的部分会被弹出的软键盘挡住，我们可以将UITextView的高度改为480 － 软键盘的高度，关闭软键盘后，高度恢复为原始高度。

 

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.textView = [[UITextView alloc] initWithFrame:self.view.frame];

    self.textView.textColor = [UIColor blackColor];

    self.textView.font = [UIFont fontWithName:@"Arial" size:18];

    self.textView.backgroundColor = [UIColor whiteColor];

    self.textView.text = @"This is the text view example, we can edit, delete, add content in the text view.";

    self.textView.returnKeyType = UIReturnKeyDefault;

    self.textView.keyboardType = UIKeyboardTypeDefault;

    self.textView.scrollEnabled = YES;

    self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;

    [self.view addSubview: self.textView];

    [self.textView release];

}

 

- (void)viewDidUnload

{

    [super viewDidUnload];

    self.textView = nil;

}

 

- (void)dealloc {

    [textView release], textView = nil;

    [super dealloc];

}

 

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

}

 

- (void)viewDidDisappear:(BOOL)animated

{

    [super viewDidDisappear:animated];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

}

 

- (void)keyboardWillShow:(NSNotification *)aNotification

{

    CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardBoundsUserInfoKey] CGRectValue];

    NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    CGRect frame = self.view.frame;

    frame.size.height -= keyboardRect.size.height;

    [UIView beginAnimations:@"ResizeForKeyboard" context:nil];

    [UIView setAnimationDuration:animationDuration];

    self.view.frame = frame;

    [UIView commitAnimations];

}

 

- (void)keyboardWillHide:(NSNotification *)aNotification

{

    CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardBoundsUserInfoKey] CGRectValue];

    NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    CGRect frame = self.view.frame;

    frame.size.height += keyboardRect.size.height;

    [UIView beginAnimations:@"ResizeForKeyboard" context:nil];

    [UIView setAnimationDuration:animationDuration];

    self.view.frame = frame;

    [UIView commitAnimations];

}

 

也可以参考帖子:http://www.cnblogs.com/iphone520/archive/2011/10/11/2207616.html