我想获得电池电量,并且精确到1%。
我用Google搜索并找到了这个,

    CFTypeRef blob = IOPSCopyPowerSourcesInfo();
CFArrayRef sources = IOPSCopyPowerSourcesList(blob);

CFDictionaryRef pSource = NULL;
const void *psValue;

int numOfSources = CFArrayGetCount(sources);
if (numOfSources == 0) {
    NSLog(@"Error in CFArrayGetCount");
    return -1.0f;
}

for (int i = 0 ; i < numOfSources ; i++)
{
    pSource = IOPSGetPowerSourceDescription(blob, CFArrayGetValueAtIndex(sources, i));
    if (!pSource) {
        NSLog(@"Error in IOPSGetPowerSourceDescription");
        return -1.0f;
    }
    psValue = (CFStringRef)CFDictionaryGetValue(pSource, CFSTR(kIOPSNameKey));

    int curCapacity = 0;
    int maxCapacity = 0;
    double percent;

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

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

    percent = ((double)curCapacity/(double)maxCapacity * 100.0f);

    return percent;
}
return -1.0f;


但这是不准确的。
所以我在这里寻求帮助。

最佳答案

UIDevice Class Reference


  您可以使用UIDevice实例获取有关电池电量状态(由batteryState属性描述)和电量水平(由batteryLevel属性描述)的信息和通知。


[UIDevice currentDevice].batteryMonitoringEnabled = YES;
float batteryLevel = [UIDevice currentDevice].batteryLevel;

NSLog(@"battery level: %f", batteryLevel * 100);

关于ios - 如何准确获取iPhone的电池电量?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/16850480/

10-10 13:59