IOS中解決Keyboard遮蓋輸入的辦法

一般來說，鍵盤遮擋主要有這麼幾種情況，一個是遮住UITextView，還有就是遮住UITextField，一 般來說，比較推薦在UIScrollView或者UITableView裡加入textfield的控制項。但是有時也許難免。

在UITextView中

這個在蘋果官方文檔中的項目中給出了做法，首先是註冊觀察者監聽 UIKeyboardWillShow和WillHide事件

- (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];  }

實現自訂的方法

- (void)keyboardWillShow:(NSNotification *)aNotification  {      NSDictionary *userInfo = [aNotification userInfo];                CGRect keyboardRect = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];      NSTimeInterval animationDuration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];                CGRect newFrame = self.view.frame;      newFrame.size.height -= keyboardRect.size.height;                [UIView beginAnimations:@"ResizeTextView" context:nil];      [UIView setAnimationDuration:animationDuration];                self.view.frame = newFrame;                [UIView commitAnimations];  }

擷取鍵盤顯示的資訊，然後根據資訊對view的frame進行調整，然後WillHide方法就跟上面相 同，只不過把高度新高度改成+= keyboardRect.size.height就可以了，最後，移除觀察者：

- (void)viewDidDisappear:(BOOL)animated  {      [super viewDidDisappear:animated];                [[NSNotificationCenter defaultCenter] removeObserver:self                                                      name:UIKeyboardWillHideNotification                                                    object:nil];      [[NSNotificationCenter defaultCenter] removeObserver:self                                                      name:UIKeyboardWillShowNotification                                                    object:nil];  }