Iphone 查看虚拟人手册中的向上滚动方法，它已经过时了

这是我使用Iphone App Development For Dummies一书中的提示和建议创建的代码。我收到一条警告，UIKeyboardBoundsUserInfoKey已被弃用。这个方法不再有效吗？我搞砸了吗？我的视图根本没有向上滚动。这是我的代码：

#import "ReturnToMeTrainingViewController.h"
#import "ReturnToMeTrainingAppDelegate.h"
@implementation ReturnToMeTrainingViewController
@synthesize callNumber;
@synthesize textField; 
@synthesize label; 


/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}
*/

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/



// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    textField.clearButtonMode = UITextFieldViewModeWhileEditing;
    }


-(void)viewWillAppear:(BOOL)animated {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:) 
                                                 name:UIKeyboardWillShowNotification
                                               object:self.view.window];
    [super viewWillAppear:animated]; 
}

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

-(void)keyboardWillShow:(NSNotification *)notif {
    NSDictionary* info = [notif userInfo];
    NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
    CGSize keyboardSize = [aValue CGRectValue].size;
    float bottomPoint = (textField.frame.origin.y+textField.frame.size.height+10); 
    scrollAmount = keyboardSize.height - (self.view.frame.size.height-bottomPoint);
    if (scrollAmount > 0){
        moveViewUp = YES;
        [self scrollTheView:YES];
    }
    else {
        moveViewUp = NO;
    }
}

-(void)scrollTheView:(BOOL)movedUp{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3];
    CGRect rect = self.view.frame;
    if (movedUp){
        rect.origin.y -= scrollAmount;
    }
    else{
        rect.origin.y += scrollAmount;
    }
    self.view.frame = rect;
    [UIView commitAnimations];
}

-(void)touchesBegan:(NSSet *)touches withEvent:
(UIEvent*)event{
    if( textField.editing) {
        [textField resignFirstResponder];
        [self updateCallNumber];
        if (moveViewUp) [self scrollTheView:NO];
    }
    [super touchesBegan:touches withEvent:event];
}


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (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.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [textField release];
    [label release];
    [callNumber release];
    [super dealloc];
}
-(BOOL)textFieldShouldReturn:(UITextField *)theTextField{
    [theTextField resignFirstResponder];
    if (moveViewUp) [self scrollTheView:NO];
    [self updateCallNumber];
    return YES;
}

-(void)updateCallNumber{
    self.callNumber = textField.text;
    label.text = self.callNumber;
}

@end

---

是的，它在3.2中被弃用：

请参阅UIWindow API文档：

我使用的代码适用于新旧SDK：

// Get the size of the keyboard.
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 30200
    NSValue* aValue = [info objectForKey:UIKeyboardFrameBeginUserInfoKey];
#else
    NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];  
#endif

CGSize keyboardSize = [aValue CGRectValue].size;

---

3.2已经很老了。我会给自己买一本新书，或者在网上读一些最新的文章。。。。该示例也没有使用较新的API用于使用块的UIView动画，这比。。。。。。。。。。。。当然，除非你想支持3.2

我尝试了你的方法，但它仍然没有向上滚动，我被卡住了