如何在插入電腦時監控iPhone的充電狀態？

Question

我正在製作一個程序，可以在插入電腦時監視iPhone的充電狀態。我如何在VB，BAT或C++中執行此操作？

Answer 1

您可以設置（在ObjC）的定時器如下：

-(NSString *)getBatteryPercent 
{ 
    CFTypeRef blob = IOPSCopyPowerSourcesInfo(); 
    CFArrayRef sources = IOPSCopyPowerSourcesList(blob); 

    CFDictionaryRef pSource = NULL; 
    const void *psValue; 

    int i; 
    int curCapacity = 0; 
    int maxCapacity = 0; 
    int percent = 0; 

    int numOfSources = CFArrayGetCount(sources); 
    //if (numOfSources == 0) return 1; 

    for (i = 0 ; i < numOfSources ; i++) 
    { 
     pSource = IOPSGetPowerSourceDescription(blob, CFArrayGetValueAtIndex(sources, i)); 

     psValue = (CFStringRef)CFDictionaryGetValue(pSource, CFSTR(kIOPSNameKey)); 

     psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSCurrentCapacityKey)); 
     CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity); 

     psValue = CFDictionaryGetValue(pSource, CFSTR(kIOPSMaxCapacityKey)); 
     CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity); 

     percent = (int)((double)curCapacity/(double)maxCapacity * 100); 
    } 
    return [NSString stringWithFormat:@"%d",percent]; 
} 

爲了讓電池的狀態：

-(NSString*)batteryStateStatus:(UIDeviceBatteryState)state 
{ 
    switch (state) 
    { 
     case UIDeviceBatteryStateUnknown: 
      return @"Unknown"; 
      break; 
     case UIDeviceBatteryStateUnplugged: 
      return @"Unplugged"; 
      break; 
     case UIDeviceBatteryStateCharging: 
      return @"Charging"; 
      break; 
     case UIDeviceBatteryStateFull: 
      return @"Charged"; 
      break; 
    } 

    return nil; 
} 

---

編輯：

需要IOKit.framework

#include <IOKit/IOKitLib.h> 
#include <IOKit/ps/IOPowerSources.h> 
#include <IOKit/ps/IOPSKeys.h>