IOS：使用 iPad 键盘的回车键操作
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IOS: action with enter key of iPad KeyBoard
提问by cyclingIsBetter
I have two textfield, in first textfield I write "Hello" and when I push enter in iPad keyboard, I want that in second textfield appear "World"; How can I use enter to create an action in my application?
我有两个文本字段，在第一个文本字段中我写了“Hello”，当我在 iPad 键盘中按下 Enter 键时，我希望在第二个文本字段中显示“世界”；如何使用 enter 在我的应用程序中创建操作？
回答by omz
You would typically assign your view controller as the text field's delegate and then implement the textFieldShouldReturn:method, e.g.:
您通常会将您的视图控制器分配为文本字段的委托，然后实现该textFieldShouldReturn:方法，例如：
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
otherTextField.text = @"World"
return YES;
}
回答by aroth
You can do that by implementing the UITextFieldDelegateprotocol in your controller. For instance you could do something like:
您可以通过实现做UITextFieldDelegate在控制器的协议。例如，您可以执行以下操作：
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
if (textField == theFirstTextField && [textField.text isEqualToString:@"Hello"]) {
theSecondTextField.text = @"World";
}
return YES;
}
回答by Michael Behan
Set your view controller to be the textfield's delegate then implement
将您的视图控制器设置为文本字段的委托，然后实现
-(BOOL)textFieldShouldReturn:(UITextField *)textField
this gets called when the enter button is pushed on the keyboard.
当按下键盘上的输入按钮时，它会被调用。
回答by Alfie Hanssen
This is roughly what you'd do. Tweaking to condition around device-type (if you truly want iPad only):
这大致就是你要做的。调整到周围设备类型条件（如果你真正想要的iPad只）：
#pragma mark - UITextField Delegate
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
if (textField == self.firstTextField && [textField.text isEqualToString:@"Hello"]) {
self.secondTextField.text = @"World";
}
return YES;
}
