获取弹出键盘时间，，，与高度

弹出键盘操作

//1.定制通知

//在初始化时定制通知

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

//2.对应的方法。

-(void)KeyboardWillShow:(NSNotification *)notification

{

NSDictionary *info = [notification userInfo];

//获取高度

NSValue *value = [info objectForKey:@"UIKeyboardBoundsUserInfoKey"];//关键的一句，网上关于获取键盘高度的解决办法，多到这句就over了。系统宏定义的UIKeyboardBoundsUserInfoKey等测试都不能获取正确的值。不知道为什么。。。

CGSize keyboardSize = [value CGRectValue].size;

NSLog(@"横屏%f",keyboardSize.height);

float keyboardHeight = keyboardSize.height;

// 获取键盘弹出的时间

NSValue *animationDurationValue = [[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey];

NSTimeInterval animationDuration;

[animationDurationValue getValue:&animationDuration];

//自定义的frame大小的改变的语句

//...

}