设置输入键盘视图的特性

一、键盘风格   

UIKit框架支持8种风格键盘。

typedef enum {
    UIKeyboardTypeDefault,                // 默认键盘：支持所有字符
    UIKeyboardTypeASCIICapable,           // 支持ASCII的默认键盘
    UIKeyboardTypeNumbersAndPunctuation,  // 标准电话键盘，支持+*#等符号
    UIKeyboardTypeURL,                    // URL键盘，有.com按钮；只支持URL字符
    UIKeyboardTypeNumberPad,              //数字键盘
    UIKeyboardTypePhonePad,               // 电话键盘
    UIKeyboardTypeNamePhonePad,           // 电话键盘，也支持输入人名字
    UIKeyboardTypeEmailAddress,           // 用于输入电子邮件地址的键盘
} UIKeyboardType;

用法用例：

textView.keyboardtype = UIKeyboardTypeNumberPad;

二、键盘外观

typedef enum {
    UIKeyboardAppearanceDefault,    // 默认外观：浅灰色
    UIKeyboardAppearanceAlert,      //深灰/石墨色
} UIKeyboardAppearance;

用法用例：

textView.keyboardAppearance=UIKeyboardAppearanceDefault;

三、回车键

typedef enum {
    UIReturnKeyDefault,  //默认：灰色按钮，标有Return
    UIReturnKeyGo,  //标有Go的蓝色按钮
    UIReturnKeyGoogle,  //标有Google的蓝色按钮，用于搜索
    UIReturnKeyJoin,  //标有Join的蓝色按钮
    UIReturnKeyNext,  //标有Next的蓝色按钮
    UIReturnKeyRoute,  //标有Route的蓝色按钮
    UIReturnKeySearch,  //标有Search的蓝色按钮
    UIReturnKeySend,  //标有Send的蓝色按钮
    UIReturnKeyYahoo,  //标有Yahoo!的蓝色按钮，用于搜索
    UIReturnKeyDone,  //标有Done的蓝色按钮
    UIReturnKeyEmergencyCall,  //紧急呼叫按钮
} UIReturnKeyType;

用法用例：

textView.returnKeyType=UIReturnKeyGo;

四、自动大写

typedef enum {
    UITextAutocapitalizationTypeNone, //不自动大写
    UITextAutocapitalizationTypeWords, //单词首字母大写
    UITextAutocapitalizationTypeSentences, //句子首字母大写
    UITextAutocapitalizationTypeAllCharacters, //所有字母大写
} UITextAutocapitalizationType;

用法用例：

textField.autocapitalizationType = UITextAutocapitalizationTypeWords;

五、自动更正

typedef enum {
    UITextAutocorrectionTypeDefault,//默认
    UITextAutocorrectionTypeNo,//不自动更正
    UITextAutocorrectionTypeYes,//自动更正
} UITextAutocorrectionType;

用法用例：

textField.autocorrectionType = UITextAutocorrectionTypeYes;

六、安全文本输入

textView.secureTextEntry=YES;

开启安全输入主要是用于密码或一些私人数据的输入，此时会禁用自动更正和自动缓存。

七、参考协议

//
// UITextInputTraits
//
// Controls features of text widgets (or other custom objects that might wish
// to respond to keyboard input).
//
@protocol UITextInputTraits <NSObject>

@optional

@property(nonatomic) UITextAutocapitalizationType autocapitalizationType; // default is UITextAutocapitalizationTypeSentences
@property(nonatomic) UITextAutocorrectionType autocorrectionType;         // default is UITextAutocorrectionTypeDefault
@property(nonatomic) UITextSpellCheckingType spellCheckingType __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0); // default is UITextSpellCheckingTypeDefault;
@property(nonatomic) UIKeyboardType keyboardType;                         // default is UIKeyboardTypeDefault
@property(nonatomic) UIKeyboardAppearance keyboardAppearance;             // default is UIKeyboardAppearanceDefault
@property(nonatomic) UIReturnKeyType returnKeyType;                       // default is UIReturnKeyDefault (See note under UIReturnKeyType enum)
@property(nonatomic) BOOL enablesReturnKeyAutomatically;                  // default is NO (when YES, will automatically disable return key when text widget has zero-length contents, and will automatically enable when text widget has non-zero-length contents)
@property(nonatomic,getter=isSecureTextEntry) BOOL secureTextEntry;       // default is NO

@end