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之前在 在iOS虛擬鍵盤上添加動態(tài)隱藏按鈕一文中描敘了關(guān)于鍵盤上添加動態(tài)按鈕的操作,發(fā)現(xiàn)鍵盤上的按鈕顯示出來的時候很僵硬,此處做了改進,添加了動畫過渡,更換了圖片,能夠讓人感覺按鈕是隨著鍵盤的動畫顯示而顯示,隨著鍵盤的動畫退出而退出,看上去更加流暢些;
效果圖:
- (void)viewDidLoad { NSLog(@"%@",NSStringFromSelector(_cmd)); [super viewDidLoad]; exitButton = [UIButton buttonWithType:UIButtonTypeCustom]; [exitButton setImage:[UIImage p_w_picpathNamed:@"down.png"] forState:UIControlStateNormal]; CGRect exitBtFrame = CGRectMake(self.view.frame.size.width-48, self.view.frame.size.height , 48.0f, 30.0f); [exitButton setFrame:exitBtFrame]; [self.view addSubview:exitButton]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardDidShow:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil]; }
- (void)handleKeyboardDidShow:(NSNotification *)notification { NSLog(@"%@",NSStringFromSelector(_cmd)); NSDictionary *info = [notification userInfo]; NSLog(@"-->info:%@",info); CGRect keyboardFrame; [[info objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardFrame]; CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue].size; NSValue *animationDurValue = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey]; NSTimeInterval animationDuration; // copy value [animationDurValue getValue:&animationDuration]; // 讓鍵盤彈起的時候添加一個動畫 [UIView beginAnimations:@"animal" context:nil]; [UIView setAnimationDuration:animationDuration]; CGFloat distanceToMove = kbSize.height; NSLog(@"---->動態(tài)鍵盤高度:%f",distanceToMove); [self adjustPanelsWithKeyBordHeight:distanceToMove]; [UIView commitAnimations]; exitButton.hidden=NO; [exitButton addTarget:self action:@selector(CancelBackKeyboard:) forControlEvents:UIControlEventTouchDown]; }
- (void)handleKeyboardWillHide:(NSNotification *)notification { NSLog(@"%@",NSStringFromSelector(_cmd)); NSDictionary *info = [notification userInfo]; CGRect keyboardFrame; [[info objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardFrame]; NSValue *animationDurValue = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey]; NSTimeInterval animationDuration; // 把animationDurvalue 值拷貝到animationDuration中 [animationDurValue getValue:&animationDuration]; [UIView beginAnimations:@"animal" context:nil]; [UIView setAnimationDuration:animationDuration]; if (exitButton) { CGRect exitBtFrame = CGRectMake(self.view.frame.size.width - 48, self.view.frame.size.height, 48.0f, 30.0f); exitButton.frame = exitBtFrame; [self.view addSubview:exitButton]; } [UIView commitAnimations]; }
-(void)adjustPanelsWithKeyBordHeight:(float) height { NSLog(@"%@",NSStringFromSelector(_cmd)); if (exitButton) { CGRect exitBtFrame = CGRectMake(self.view.frame.size.width - 48, self.view.frame.size.height - height-30, 48.0f, 30.0f); exitButton.frame = exitBtFrame; [self.view addSubview:exitButton]; } }
-(void)CancelBackKeyboard:(id)sender { NSLog(@"%@",NSStringFromSelector(_cmd)); [textField resignFirstResponder]; }
- (void)viewDidUnload { [self setTextField:nil]; exitButton=nil; [super viewDidUnload]; // Release any retained subviews of the main view. }
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } - (void)dealloc { [textField release]; [exitButton release]; [[NSNotificationCenter defaultCenter] removeObserver:self]; [super dealloc]; }
源碼:http://download.csdn.net/detail/duxinfeng2010/4858444
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