macos iphone如何处理关键事件
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how to handle key events in iphone
提问by aqavi_paracha
Hi I am working on an iphone application and want to handle keyboard events in iphone. In Mac, there is a class NSEvent which handles both keyboard and mouse events, and in ios (iphone/ipad) the counterpart of NSEvent is UIEvent which handles only touch events. I know ios API does not provide this functionality, but how can i handle key events in iphone??? Any good tutorial or sth, to get started...
嗨，我正在开发一个 iphone 应用程序，想在 iphone 中处理键盘事件。在 Mac 中，有一个类 NSEvent 处理键盘和鼠标事件，而在 ios (iphone/ipad) 中，NSEvent 的对应物是 UIEvent，它只处理触摸事件。我知道 ios API 不提供此功能，但是我如何处理 iphone 中的关键事件？？？任何好的教程或某事，开始...
回答by Ishu
You cant directly code for keyboad;s key and there is no mouse in case of device.
您不能直接为键盘编码；s 键并且在设备的情况下没有鼠标。
you can make your logics for different kind of charectersets or you can make your logics in textField delgate methods or Textview Delegates method
您可以为不同类型的字符集制作逻辑，也可以在 textField 委托方法或 Textview 委托方法中制作逻辑
textView delegate
文本视图委托
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
textField delegate
文本字段委托
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
You can also use Notification for textField and Textview.
您还可以对 textField 和 Textview 使用通知。
For TextField use this
对于 TextField 使用这个
call this register method in viewDidLoad
在 viewDidLoad 中调用这个注册方法
-(void)registerForTextFieldNotifications {
NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
[notificationCenter addObserver:self
selector:@selector (handle_TextFieldTextChanged:)
name:UITextFieldTextDidChangeNotification
object:self.textField];
}
- (void) handle_TextFieldTextChanged:(id)notification {
if([iSinAppObj.passCodeString isEqualToString:lockTextField.text])
{
//code here
}
}
and for text view you need to change only event name like this
对于文本视图，您只需要像这样更改事件名称
[notificationCenter addObserver:self
selector:@selector (handle_TextFieldTextChanged:)
name:UITextViewTextDidChangeNotification
object:self.textField];
回答by Jose Cherian
You can use notifications to handle events as explained here: http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html
您可以使用通知来处理事件，如下所述：http: //developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html
But the functionality is very limited.
但是功能非常有限。
