关于ios 6：出现键盘时UITableView不滚动

UITableView doesn't scroll when keyboard appears

我在这里尝试了 Apple 的示例：

http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html

但是，它似乎不起作用，所以我显然在此过程中遗漏了一些东西，只是不知道是什么。

我有一个 ViewController.h 包含：

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@interface PreferencesViewController : UIViewController <UITableViewDataSource, UITableViewDelegate, defaultLocationChoice, UITextFieldDelegate, UIScrollViewDelegate>

@property (nonatomic, retain) NSString *defaultLocation;
@property (nonatomic, retain) NSString *defaultTestType;
@property (nonatomic, assign) id <defaultLocationChoice> locationDelegate;
@property (nonatomic, weak) IBOutlet UITableView *tableView;
@property (nonatomic, strong) IBOutlet UITextField *locationnameTextField;
@property (nonatomic, strong) IBOutlet UITextField *locationaddressTextField;
@property (strong, nonatomic) IBOutlet UITableView *scrollView;
@property (nonatomic, strong) IBOutlet UITextField *activeField;

.m文件里都有Synthesized。

我在 ViewController.m 中有 Apple 代码如下

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- (void)viewDidLoad
{
NSUserDefaults *sharedPref = [NSUserDefaults standardUserDefaults];
defaultLocation =[sharedPref stringForKey:@"defaultLocation"];
defaultTestType =[sharedPref stringForKey:@"defaultTestType"];

[self registerForKeyboardNotifications];

self.navigationItem.title = @"Preferences";

[super viewDidLoad];

}

- (void)registerForKeyboardNotifications

{

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];

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

}

// Called when the UIKeyboardDidShowNotification is sent.

- (void)keyboardWasShown:(NSNotification*)aNotification

{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;

// If active text field is hidden by keyboard, scroll it so it's visible

// Your application might not need or want this behavior.

CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;

if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {

CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y-kbSize.height);

[scrollView setContentOffset:scrollPoint animated:YES];
}
}

// Called when the UIKeyboardWillHideNotification is sent

- (void)keyboardWillBeHidden:(NSNotification*)aNotification

{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField

{
activeField = textField;
}

- (void)textFieldDidEndEditing:(UITextField *)textField

{
activeField = nil;
}

包含 TextFields 的单元格在 CellForRowAtIndexPath 中处理如下(完整代码未显示)：

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case 2:
switch (indexPath.row) {
case 0:

prefCell.textLabel.text = @"";
prefCell.accessoryType = UITableViewCellAccessoryNone;
prefCell.highlighted = NO;
locationnameTextField.frame = CGRectMake(5, 12, 300, 30);
locationnameTextField.font = [UIFont systemFontOfSize:13.0f];
locationnameTextField.placeholder = @"Enter location name i.e. New York, NY";
locationnameTextField.delegate = self;
locationnameTextField.returnKeyType = UIReturnKeyDone;
[prefCell.contentView addSubview:locationnameTextField];

break;
case 1:
prefCell.textLabel.text = @"";
prefCell.accessoryType = UITableViewCellAccessoryNone;

locationaddressTextField.frame = CGRectMake(5, 12, 300, 30);
locationaddressTextField.font = [UIFont systemFontOfSize:13.0f];
locationaddressTextField.placeholder = @"Enter location address i.e. mcs.newyork.com";
locationaddressTextField.clearsOnBeginEditing = YES;
locationaddressTextField.delegate = self;
locationaddressTextField.returnKeyType = UIReturnKeyDone;

[prefCell.contentView addSubview:locationaddressTextField];

break;
}

在运行应用程序时，键盘会弹出，但没有任何反应。

Apples 示例适用于 View，因此我在上面更改的唯一代码是 self.view.frame 到 self.tableView.frame 无效。

我添加了 ScrollView 作为附加项，因为我没有。我的其他带有嵌入式 TableView 的 ViewController 不需要 ScrollView 来滚动。

层次结构如下：

enter

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- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
[yourTextField resignFirstResponder];
}