插入来自非活动应用程序的文本？

Question

我的应用程序在后台运行，并不总是处于活动状态。但是，我怎样才能将预定的文本插入到用户计算机上的当前光标位置，而不会使我的应用程序处于活动状态？

Answer 1

此代码使用Accessibility API。

CFTypeRef focusedUI; 
     AXUIElementCopyAttributeValue(AXUIElementCreateSystemWide(), kAXFocusedUIElementAttribute, &focusedUI); 

     if (focusedUI) { 
      CFTypeRef textValue, textRange; 
      // get text content and range 
      AXUIElementCopyAttributeValue(focusedUI, kAXValueAttribute, &textValue); 
      AXUIElementCopyAttributeValue(focusedUI, kAXSelectedTextRangeAttribute, &textRange); 

      NSRange range; 
      AXValueGetValue(textRange, kAXValueCFRangeType, &range); 
      // replace current range with new text 
      NSString *newTextValue = [(__bridge NSString *)textValue stringByReplacingCharactersInRange:range withString:@"hello"]; 
      AXUIElementSetAttributeValue(focusedUI, kAXValueAttribute, (__bridge CFStringRef)newTextValue); 
      // set cursor to correct position 
      range.length = 5; 
      range.location += 5; 
      AXValueRef valueRef = AXValueCreate(kAXValueCFRangeType, (const void *)&range); 
      AXUIElementSetAttributeValue(focusedUI, kAXSelectedTextRangeAttribute, valueRef); 

      CFRelease(textValue); 
      CFRelease(textRange); 
      CFRelease(focusedUI); 
     }