在UITextField键盘上添加取消按钮

Question

有没有办法在显示的键盘上添加取消按钮UITextField？查看UITextInputTraits协议参考,我找不到任何东西,包括尝试不同的键盘类型.

Answer 1

您可以创建一个输入附件视图,该视图可以在键盘上方显示UIToolBar,然后为此添加取消按钮.请查看下面的文档链接以获取inputAccessoryView属性.

http://developer.apple.com/library/ios/#documentation/uikit/reference/UITextField_Class/Reference/UITextField.html

这是我为TextView所做的一个例子.从"textViewDidBeginEditing"调用create input Accessory View方法.然后它创建输入附件视图,在我的例子中添加三个按钮和一个空格键.

我希望有所帮助.

-(void)textViewDidBeginEditing:(UITextView *)textView {

[self createInputAccessoryView];
[textView setInputAccessoryView:_inputAccessoryView];
self.myTextView = textView;  }

-(void)createInputAccessoryView {

_inputAccessoryView = [[UIToolbar alloc] init];
_inputAccessoryView.barStyle = UIBarStyleBlackOpaque;
[_inputAccessoryView sizeToFit];

_inputAccessoryView.frame = CGRectMake(0,_collageView.frame.size.height - 44, _collageView.frame.size.width, 44);

UIBarButtonItem *fontItem = [[UIBarButtonItem alloc] initWithTitle:@"Font"
                                                             style:UIBarButtonItemStyleBordered
                                                            target:self action:@selector(changeFont:)];
UIBarButtonItem *removeItem = [[UIBarButtonItem alloc] initWithTitle:@"Remove"
                                                             style:UIBarButtonItemStyleBordered
                                                            target:self action:@selector(removeTextView:)];
//Use this to put space in between your toolbox buttons
UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
                                                                          target:nil
                                                                          action:nil];
UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                             style:UIBarButtonItemStyleDone
                                                            target:self action:@selector(dismissKeyBoard:)];

NSArray *items = [NSArray arrayWithObjects:fontItem,removeItem,flexItem,doneItem, nil];
[_inputAccessoryView setItems:items animated:YES];
[_myTextView addSubview:_inputAccessoryView];
}