1.定位到文件UnityView+Keyboard.mm同如下路径:
2.打开该Objective-C脚本进行编辑,找到关键函数: createKeyboard:
- (void)createKeyboard
{
// only English keyboard layout is supported
NSString* baseLayout = @"1234567890-=qwertyuiop[]asdfghjkl;'\\`zxcvbnm,./!@#$%^&*()_+{}:\"|<>?~ \t\r\b\\";
NSString* numpadLayout = @"1234567890-=*+/.\r";
NSString* upperCaseLetters = @"QWERTYUIOPASDFGHJKLZXCVBNM";
size_t sizeOfKeyboardCommands = baseLayout.length + numpadLayout.length + upperCaseLetters.length + 11;
NSMutableArray* commands = [NSMutableArray arrayWithCapacity: sizeOfKeyboardCommands];
void (^addKey)(NSString *keyName, UIKeyModifierFlags modifierFlags) = ^(NSString *keyName, UIKeyModifierFlags modifierFlags)
{
UIKeyCommand* command = [UIKeyCommand keyCommandWithInput: keyName modifierFlags: modifierFlags action: @selector(handleCommand:)];
#if UNITY_HAS_IOSSDK_15_0
if (@available(iOS 15.0, tvOS 15.0, *))
command.wantsPriorityOverSystemBehavior = YES;
#endif
[commands addObject:command];
};
for (NSInteger i = 0; i < baseLayout.length; ++i)
{
NSString* input = [baseLayout substringWithRange: NSMakeRange(i, 1)];
NSLog(@"%@ !!!",input);
addKey(input, kNilOptions);
}
for (NSInteger i = 0; i < numpadLayout.length; ++i)
{
NSString* input = [numpadLayout substringWithRange: NSMakeRange(i, 1)];
addKey(input, UIKeyModifierNumericPad);
}
for (NSInteger i = 0; i < upperCaseLetters.length; ++i)
{
NSString* input = [upperCaseLetters substringWithRange: NSMakeRange(i, 1)];
addKey(input, UIKeyModifierShift);
}
// pageUp, pageDown
addKey(@"UIKeyInputPageUp", kNilOptions);
addKey(@"UIKeyInputPageDown", kNilOptions);
// up, down, left, right, esc
addKey(UIKeyInputUpArrow, kNilOptions);
addKey(UIKeyInputDownArrow, kNilOptions);
addKey(UIKeyInputLeftArrow, kNilOptions);
addKey(UIKeyInputRightArrow, kNilOptions);
addKey(UIKeyInputEscape, kNilOptions);
// caps Lock, shift, control, option, command
addKey(@"", UIKeyModifierAlphaShift);
addKey(@"", UIKeyModifierShift);
addKey(@"", UIKeyModifierControl);
addKey(@"", UIKeyModifierAlternate);
addKey(@"", UIKeyModifierCommand);
keyboardCommands = commands.copy;
}此函数由Unity定义,通过addKey函数负责初始化注册所有需要响应的按键.
void (^addKey)(NSString *keyName, UIKeyModifierFlags modifierFlags) = ^(NSString *keyName, UIKeyModifierFlags modifierFlags)
{
UIKeyCommand* command = [UIKeyCommand keyCommandWithInput: keyName modifierFlags: modifierFlags action: @selector(handleCommand:)];
#if UNITY_HAS_IOSSDK_15_0
if (@available(iOS 15.0, tvOS 15.0, *))
command.wantsPriorityOverSystemBehavior = YES;
#endif
[commands addObject:command];
};函数接受两个参数第一个是keyName表示接收的按键名称例如键盘上的a-z,第二个参数为UIKeyModifierFlags表示作为Modifier的按键种类如下:
typedef NS_OPTIONS(NSInteger, UIKeyModifierFlags) {
UIKeyModifierAlphaShift = 1 << 16, // This bit indicates CapsLock
UIKeyModifierShift = 1 << 17,
UIKeyModifierControl = 1 << 18,
UIKeyModifierAlternate = 1 << 19,
UIKeyModifierCommand = 1 << 20,
UIKeyModifierNumericPad = 1 << 21,
} API_AVAILABLE(ios(7.0));使用时例如用户需要接收处理command a,需调用addKey(@"a", UIKeyModifierCommand); 针对于特殊按键对应的NSString存储于UIResponder.h中:
// These are pre-defined constants for use with the input property of UIKeyCommand objects.
UIKIT_EXTERN NSString *const UIKeyInputUpArrow API_AVAILABLE(ios(7.0));
UIKIT_EXTERN NSString *const UIKeyInputDownArrow API_AVAILABLE(ios(7.0));
UIKIT_EXTERN NSString *const UIKeyInputLeftArrow API_AVAILABLE(ios(7.0));
UIKIT_EXTERN NSString *const UIKeyInputRightArrow API_AVAILABLE(ios(7.0));
UIKIT_EXTERN NSString *const UIKeyInputEscape API_AVAILABLE(ios(7.0));
UIKIT_EXTERN NSString *const UIKeyInputPageUp API_AVAILABLE(ios(8.0));
UIKIT_EXTERN NSString *const UIKeyInputPageDown API_AVAILABLE(ios(8.0));
UIKIT_EXTERN NSString *const UIKeyInputHome API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputEnd API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF1 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF1 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF2 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF3 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF4 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF5 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF6 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF7 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF8 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF9 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF10 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF11 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputF12 API_AVAILABLE(ios(13.4), tvos(13.4)) API_UNAVAILABLE(watchos);
UIKIT_EXTERN NSString *const UIKeyInputDelete API_AVAILABLE(ios(15.0), tvos(15.0)) API_UNAVAILABLE(watchos);此文档以F1-F12按键添加为例:使用addKey(UIKeyInputF4, kNilOptions);
addKey(UIKeyInputF1, kNilOptions);
addKey(UIKeyInputF2, kNilOptions);
addKey(UIKeyInputF3, kNilOptions);
addKey(UIKeyInputF4, kNilOptions);-
注册好按键后还需要在handleCommand函数中进行响应处理:
- (void)handleCommand:(UIKeyCommand *)command
{
NSString* input = command.input;
UIKeyModifierFlags modifierFlags = command.modifierFlags;
char inputChar = ([input length] > 0) ? [input characterAtIndex: 0] : 0;
int code = (int)inputChar; // ASCII code
UnitySendKeyboardCommand(command);
if (![self isValidCodeForButton: code])
{
code = 0;
}
if ((modifierFlags & UIKeyModifierAlphaShift) != 0)
code = UnityStringToKey("caps lock");
if ((modifierFlags & UIKeyModifierShift) != 0)
code = UnityStringToKey("left shift");
if ((modifierFlags & UIKeyModifierControl) != 0)
code = UnityStringToKey("left ctrl");
if ((modifierFlags & UIKeyModifierAlternate) != 0)
code = UnityStringToKey("left alt");
if ((modifierFlags & UIKeyModifierCommand) != 0)
code = UnityStringToKey("left cmd");
if ((modifierFlags & UIKeyModifierNumericPad) != 0)
{
switch (inputChar)
{
case '0':
code = UnityStringToKey("[0]");
break;
case '1':
code = UnityStringToKey("[1]");
break;
case '2':
code = UnityStringToKey("[2]");
break;
case '3':
code = UnityStringToKey("[3]");
break;
case '4':
code = UnityStringToKey("[4]");
break;
case '5':
code = UnityStringToKey("[5]");
break;
case '6':
code = UnityStringToKey("[6]");
break;
case '7':
code = UnityStringToKey("[7]");
break;
case '8':
code = UnityStringToKey("[8]");
break;
case '9':
code = UnityStringToKey("[9]");
break;
case '-':
code = UnityStringToKey("[-]");
break;
case '=':
code = UnityStringToKey("equals");
break;
case '*':
code = UnityStringToKey("[*]");
break;
case '+':
code = UnityStringToKey("[+]");
break;
case '/':
code = UnityStringToKey("[/]");
break;
case '.':
code = UnityStringToKey("[.]");
break;
case '\r':
code = UnityStringToKey("enter");
break;
default:
break;
}
}
if (input == UIKeyInputUpArrow)
code = UnityStringToKey("up");
else if (input == UIKeyInputDownArrow)
code = UnityStringToKey("down");
else if (input == UIKeyInputRightArrow)
code = UnityStringToKey("right");
else if (input == UIKeyInputLeftArrow)
code = UnityStringToKey("left");
else if (input == UIKeyInputEscape)
code = UnityStringToKey("escape");
else if ([input isEqualToString: @"UIKeyInputPageUp"])
code = UnityStringToKey("page up");
else if ([input isEqualToString: @"UIKeyInputPageDown"])
code = UnityStringToKey("page down");
KeyMap::iterator item = GetKeyMap().find(code);
if (item == GetKeyMap().end())
{
// New key is down, register it and its time
UnitySetKeyboardKeyState(code, true);
GetKeyMap()[code] = GetTimeInSeconds();
}
else
{
// Still holding the key, update its time
item->second = GetTimeInSeconds();
}
}函数中input表示createKeyboard函数注册对应的keyName,modifierFlags表示注册时传入的modifierFlags.函数中的Code对应Unity的KeyCodeEnum:
using System;
namespace UnityEngine
{
// Key codes returned by Event.keyCode. These map directly to a physical key on the keyboard.
public enum KeyCode
{
// Not assigned (never returned as the result of a keystroke)
None = 0,
// The backspace key
Backspace = 8,
// The forward delete key
Delete = 127,
// The tab key
Tab = 9,
// The Clear key
Clear = 12,
// Return key
Return = 13,
// Pause on PC machines
Pause = 19,
// Escape key
Escape = 27,
// Space key
Space = 32,
// Numeric keypad 0
Keypad0 = 256,
// Numeric keypad 1
Keypad1 = 257,前添加判断并给code进行赋值即可,F1-F12对应282-294以此为例代码如下:
if (input == UIKeyInputF1)
code = 282;
else if (input == UIKeyInputF2)
code = 283;
else if (input == UIKeyInputF3)
code = 284;-
测试结果如下:
