#import "KeyboardViewController.h"

@implementation KeyboardViewController

@synthesize textView;

@synthesize textRect;

- (void)didReceiveMemoryWarning

{

// Releases the view if it doesn't have a superview.

[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.

}

#pragma mark - View lifecycle

- (void)viewDidLoad

{

[super viewDidLoad];

// 增加Code按钮，可跳转至教学页面

UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Code" style:UIBarButtonItemStyleBordered target:self action:@selector(code)];

self.navigationItem.rightBarButtonItem = item;

// 捕捉键盘出现和消失时的事件

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

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

}

- (void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:animated];

self.textRect = self.textView.frame;

}

- (void)viewDidUnload

{

[self setTextView:nil];

[super viewDidUnload];

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

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

}

#pragma mark -

#pragma mark Responding to keyboard events

- (void)keyboardWillShow:(NSNotification *)notification {

/*

NSDictionary *userInfo = [notification userInfo];

// Get the origin of the keyboard when it's displayed.

NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

// Get the top of the keyboard as the y coordinate of its origin in self's view's coordinate system. The bottom of the text view's frame should align with the top of the keyboard's final position.

CGRect keyboardRect = [aValue CGRectValue];

keyboardRect = [self.view convertRect:keyboardRect fromView:nil];

CGFloat keyboardTop = keyboardRect.origin.y;

CGRect newTextViewFrame = self.textView.frame;

newTextViewFrame.size.height = keyboardTop - self.textView.frame.origin.y;

// Get the duration of the animation.

NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];

NSTimeInterval animationDuration;

[animationDurationValue getValue:&animationDuration];

// Animate the resize of the text view's frame in sync with the keyboard's appearance.

[UIView beginAnimations:nil context:NULL];

[UIView setAnimationDuration:animationDuration];

textView.frame = newTextViewFrame;

[UIView commitAnimations];

}

- (void)keyboardWillHide:(NSNotification *)notification {

NSDictionary* userInfo = [notification userInfo];

/*

NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];

NSTimeInterval animationDuration;

[animationDurationValue getValue:&animationDuration];

[UIView beginAnimations:nil context:NULL];

[UIView setAnimationDuration:animationDuration];

self.textView.frame = self.textRect;

[UIView commitAnimations];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

[self.textView resignFirstResponder];

}

- (void)code

{

CodeViewController *controller = [[CodeViewController alloc] initWithNibName:@"CodeViewController" bundle:nil];

NSString *name = [NSString stringWithUTF8String:object_getClassName(self)];

controller.className = name;

[self.navigationController pushViewController:controller animated:YES];

}