我在这里尝试了 Apple 的示例:
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:
@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 文件中都有 Synthesized。
我在 ViewController.m 中有 Apple 代码
- (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(未显示完整代码):
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,键盘弹出,没有任何反应。
Apple 的示例是针对 View 的,因此我在上面更改的唯一代码self.view.frame
无效self.tableView.frame
。
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:
任何帮助都会很棒,谢谢