在UITextField键盘上添加取消按钮 [英] Adding a cancel button to UITextField keyboard

问题描述

有没有办法在 UITextField 显示的键盘上添加取消按钮？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。

Is there a way to add a cancel button to the keyboard displayed for UITextField? Looking over the UITextInputTraits Protocol Reference, I could not find anything, including trying out the different keyboard types.

推荐答案

您可以创建一个输入附件视图，它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，了解inputAccessoryView属性。

You can create a input accessory view which can display a UIToolBar Above the keyboard and then add a cancel button to this. Take a look at the documentation link below for the inputAccessoryView property.

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。然后它创建了输入附件视图，在我的例子中添加了三个按钮和一个空格键。

This is an example of one I did for a TextView. The create Input Accessory View method is called from "textViewDidBeginEditing". Then it creates the input accessory view and in my case adds three buttons and a space bar.

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];
}

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