如何获取电池状态？

Question

如何获取iPhone上的电池状态？

Answer 1

UIDevice *myDevice = [UIDevice currentDevice]; 
[myDevice setBatteryMonitoringEnabled:YES]; 
float batLeft = [myDevice batteryLevel]; 
int i=[myDevice batteryState]; 

int batinfo=(batLeft*100); 

NSLog(@"Battry Level is :%d and Battery Status is :%d",batinfo,i); 

switch (i) 
{ 
    case UIDeviceBatteryStateUnplugged: 
    { 
     [BCStatus setText:NSLocalizedString(@"UnpluggedKey", @"")]; 
     break; 
    } 
    case UIDeviceBatteryStateCharging: 
    { 
     [BCStatus setText:NSLocalizedString(@"ChargingKey", @"")]; 
     break; 
    } 
    case UIDeviceBatteryStateFull: 
    { 
     [BCStatus setText:NSLocalizedString(@"FullKey", @"")]; 
     break; 
    } 
    default: 
    { 
     [BCStatus setText:NSLocalizedString(@"UnknownKey", @"")]; 
     break; 
    } 
} 

BCStatus是uilabel。

Answer 2

Iphone SDK 3.0 beta支持此功能。

Answer 3

现在已发布3.1 SDK，请在UIDevice的文档中查找获取设备电池状态部分。它是电池*特性的一部分。

Answer 4

下面是我用于我的字符串作为一种快速实用的方法，请注意，您必须启用电池监视才能获取值，然后如果您不想获取通知（显然要获得某些效率，因为他们给你关闭它的能力），那么你应该再后关闭它（就像我在这个功能做）：

NSString *statusString(void) 
{ 
    UIDevice *device = [UIDevice currentDevice]; 
    NSString *batteryStateString = nil; 
    switch(device.batteryState) 
    { 
     case UIDeviceBatteryStateUnplugged: batteryStateString = @"Unplugged"; break; 
     case UIDeviceBatteryStateCharging: batteryStateString = @"Charging"; break; 
     case UIDeviceBatteryStateFull: batteryStateString = @"Full"; break; 
     default: batteryStateString = @"Unknown"; break; 
    } 

    [device setBatteryMonitoringEnabled:YES]; 
    NSString *statusString = [NSString stringWithFormat:@"Battery Level - %d%%, Battery State - %@", 
           (int)round(device.batteryLevel * 100), batteryStateString]; 
    [device setBatteryMonitoringEnabled:NO]; 
    return statusString; 
} 

Answer 5

以上这些问题的答案都非常好，但他们都在Obj- C，我已经使用这些与其他示例在MonoTouch上执行相同的任务，因此我将代码放在这里以防万一需要：

try 
{ 
    UIDevice.CurrentDevice.BatteryMonitoringEnabled = true; 
    _Battery.Level = (int)(UIDevice.CurrentDevice.BatteryLevel * IOSBatteryLevelScalingFactor); 
    _Battery.State = UIDevice.CurrentDevice.BatteryState; 
} 
catch (Exception e) 
{ 
    ExceptionHandler.HandleException(e, "BatteryState.Update"); 
    throw new BatteryUpdateException(); 
} 
finally 
{ 
    UIDevice.CurrentDevice.BatteryMonitoringEnabled = false; 
} 

我也有一个完整的文章在我的博客给在here