改变系统键盘的return键，UIReturnKeyTeype_uireturnkeyemergencycall-优快云博客

本文介绍了UIReturnKeyType枚举类型，该类型定义了iOS设备虚拟键盘返回键的不同显示文本选项，如默认显示为“Done”、“Go”、“Next”等，适用于iPhone OS 2.0及更高版本。

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UIReturnKeyType
The text string displayed in the “return” key of a keyboard.

typedef enum {
   UIReturnKeyDefault,
   UIReturnKeyGo,
   UIReturnKeyGoogle,
   UIReturnKeyJoin,
   UIReturnKeyNext,
   UIReturnKeyRoute,
   UIReturnKeySearch,
   UIReturnKeySend,
   UIReturnKeyYahoo,
   UIReturnKeyDone,
   UIReturnKeyEmergencyCall,
} UIReturnKeyType;
Constants
UIReturnKeyDefault
Set the text of the return key to “return”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyGo
Set the text of the return key to “Go”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyGoogle
Set the text of the return key to “Google”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyJoin
Set the text of the return key to “Join”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyNext
Set the text of the return key to “Next”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyRoute
Set the text of the return key to “Route”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeySearch
Set the text of the return key to “Search”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeySend
Set the text of the return key to “Send”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyYahoo
Set the text of the return key to “Yahoo”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyDone
Set the text of the return key to “Done”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.
UIReturnKeyEmergencyCall
Set the text of the return key to “Emergency Call”.
Available in iPhone OS 2.0 and later.
Declared in UITextInputTraits.h.