如何从inputAccessoryView按钮单击获取UITextField

时间:2013-08-23 15:45:37

标签: ios objective-c uitextfield uitoolbar

我的动态编号UITextFields都有inputAccessoryView。它由UIToolbar组成,其上有一个按钮。按下此按钮时,它会调用一个方法,但是,在此方法中,我需要能够访问基础UITextField

请有人可以告知如何做到这一点吗?

// Create the toolbar controls
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(navigationBarDoneButtonPressed:)];
UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

// Setup the toolbar
navigationToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(10.0, 0.0, 310.0, 40.0)];
[navigationToolbar setItems:@[flexibleSpace, doneButton]];

// In a UITableView I create a number of cells which contain UITextFields....

// This is the method that gets called when a user presses the done button
- (void)navigationBarDoneButtonPressed:(id)sender
{
    NSLog(@"Based on sender I need to access the underlying UITextField.");
}

2 个答案:

答案 0 :(得分:6)

您可以跟踪变量中当前关注的UITextField,并在inputAccesoryView方法中使用该变量:

你的.h文件中的

:确保你符合UITextFieldDelegate协议:

@interface MyViewController : UIViewController <UITextFieldDelegate>

并添加此属性:

@property (assign, nonatomic) UITextField *activeTextField;

在.m文件中:创建动态文本字段时:

...
theTextField.delegate=self;
...

并添加UITextFieldDelegate协议的这些实现:

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    self.activeTextField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
    self.activeTextField = nil;
}

现在,在inputAccesoryView

调用的方法中
- (void)navigationBarDoneButtonPressed:(id)sender{//Just an example
    self.activeTextField.text=@"Test";
}

答案 1 :(得分:0)

我将使用委托创建UITableViewCell子类,例如

MyTextEditTableViewCell.h

@class MyTextEditTableViewCell;
@protocol MyTextEditTableViewCellDelegate <NSObject>
- (void)didDoneButtonPressed:(MyTextEditTableViewCell *)sender;
@end

@interface MyTextEditTableViewCell : UITableViewCell
@property (nonatomic, weak) id<MyTextEditTableViewCellDelegate> delegate;
@property (nonatomic, strong) UITextField *textField;
@end

MyTextEditTableViewCell.m

@implementation MyTextEditTableViewCell
- (void)navigationBarDoneButtonPressed:(id)sender
{
    // Call delegate
    if (self.delegate)
          [self.delegate didDoneButtonPressed:self];
}
@end

您的UIViewController子类(或UITableViewController)

...
- (void)didDoneButtonPressed:(MyTextEditTableViewCell *)sender {
    UITextField *cellTextField = sender.textField;
    // do some stuff with text field
}

在配置时,不要忘记将委托设置为单元格。