TextView随键盘弹出上移高度

很多时候我们都在为键盘遮挡了原本就不大的屏幕时而烦恼，特别是当用户处于编辑状态时，键盘下面的内容就看不见了，用户只能处于盲打状态了。现在有一种简单的解决办法，基本思路就是，添加通知。一直监听键盘事件，在键盘遮挡时，将编辑器上移键盘的高度，键盘消失时，编辑区回复原来位置，ok，来两段代码吧

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.textView=[[UITextView alloc]initWithFrame:self.view.frame];
self.textView.text=@"请输入文字";
[self.view addSubview:self.textView];
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (void)viewWillAppear:(BOOL)animated
{
//注册通知,监听键盘出现
[[NSNotificationCenter defaultCenter]addObserver:self
selector:@selector(handleKeyboardDidShow:)
name:UIKeyboardDidShowNotification
object:nil];
//注册通知，监听键盘消失事件
[[NSNotificationCenter defaultCenter]addObserver:self
selector:@selector(handleKeyboardDidHidden)
name:UIKeyboardDidHideNotification
object:nil];
[super viewWillAppear:YES];
}

//监听事件
- (void)handleKeyboardDidShow:(NSNotification*)paramNotification
{
//获取键盘高度
NSValue *keyboardRectAsObject=[[paramNotification userInfo]objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect;
[keyboardRectAsObject getValue:&keyboardRect];

self.textView.contentInset=UIEdgeInsetsMake(0, 0,keyboardRect.size.height, 0);
}

- (void)handleKeyboardDidHidden
{
self.textView.contentInset=UIEdgeInsetsZero;
}

- (void)viewDidDisappear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}