iPhone 和输入,键盘相关的属性

最新推荐文章于 2025-07-23 16:43:18 发布

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本文介绍了如何使用UITextField来优化iOS应用中的文本输入体验。详细解释了清除按钮的显示模式、键盘类型、呈现风格、自动大写及纠正设置，以及返回键类型等特性。此外还提供了一个自定义键盘按钮的实例。

当文本输入时, 文本框有几中选择用于辅助输入:

textField.clearButtonMode = UITextFieldViewModeWhileEditing;

typedef enum {
    UITextFieldViewModeNever, //clear button 永远不出现
    UITextFieldViewModeWhileEditing, //编辑的时候出现
    UITextFieldViewModeUnlessEditing, //未编辑的时候出现
    UITextFieldViewModeAlways //永远都出现
} UITextFieldViewMode;

弹出的键盘类型也可以辅助快速输入:

textField.keyboardType = UIKeyboardTypeAlphabet;

typedef enum {
    UIKeyboardTypeDefault,                // Default type for the current input method.
    UIKeyboardTypeASCIICapable,           // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain active
    UIKeyboardTypeNumbersAndPunctuation,  // Numbers and assorted punctuation.
    UIKeyboardTypeURL,                    // A type optimized for URL entry (shows . / .com prominently).
    UIKeyboardTypeNumberPad,              // A number pad (0-9). Suitable for PIN entry.
    UIKeyboardTypePhonePad,               // A phone pad (1-9, *, 0, #, with letters under the numbers).
    UIKeyboardTypeNamePhonePad,           // A type optimized for entering a person's name or phone number.
    UIKeyboardTypeEmailAddress,           // A type optimized for multiple email address entry (shows space @ . prominently).

    UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated

} UIKeyboardType;

键盘的呈现风格:

textField..keyboardAppearance = UIKeyboardAppearanceAlert;

typedef enum {
    UIKeyboardAppearanceDefault,          // Default apperance for the current input method.
    UIKeyboardAppearanceAlert,            // Appearance suitable for use in "alert" scenarios.
} UIKeyboardAppearance;

键盘对输入字母的控制:

textField.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;

typedef enum {
    UITextAutocapitalizationTypeNone, //什么也不做
    UITextAutocapitalizationTypeWords, //单词首字母大写
    UITextAutocapitalizationTypeSentences, //句子首字母大些
    UITextAutocapitalizationTypeAllCharacters, //所有字母大些
} UITextAutocapitalizationType;

键盘对输入字母自动纠正

textField.autocorrectionType = UITextAutocorrectionTypeYes;

typedef enum {
    UITextAutocorrectionTypeDefault,
    UITextAutocorrectionTypeNo,
    UITextAutocorrectionTypeYes,
} UITextAutocorrectionType;

确认键的类型

textField.returnKeyType = UIReturnKeyDone;

typedef enum {
    UIReturnKeyDefault,
    UIReturnKeyGo,
    UIReturnKeyGoogle,
    UIReturnKeyJoin,
    UIReturnKeyNext,
    UIReturnKeyRoute,
    UIReturnKeySearch,
    UIReturnKeySend,
    UIReturnKeyYahoo,
    UIReturnKeyDone,
    UIReturnKeyEmergencyCall,
} UIReturnKeyType;

最后一个技巧,也是网上收集,键盘透明以及增加一个按键的应用:

[[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(keyboardWillShow:) 
                                                 name:UIKeyboardWillShowNotification 
                                               object:nil];



--------------------
- (void)keyboardWillShow:(NSNotification *)note {  
    // create custom button
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
    doneButton.frame = CGRectMake(0, 163, 106, 53);
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setImage:[UIImage imageNamed:@"DoneUp.png"] forState:UIControlStateNormal];
    [doneButton setImage:[UIImage imageNamed:@"DoneDown.png"] forState:UIControlStateHighlighted];
    [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];

    // locate keyboard view
    UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    UIView* keyboard;
    for(int i=0; i<[tempWindow.subviews count]; i++) {
        keyboard = [tempWindow.subviews objectAtIndex:i];
        // keyboard view found; add the custom button to it
        if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
            [keyboard addSubview:doneButton];
    }
}