获取设备电池电量及状态

来源：互联网发布：浮生知星辰txt百度云编辑：程序博客网时间：2024/05/16 21:30

1.获取当前设备的电量

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

if (batteryLevel < 0.0) {    // -1.0 means battery state is UIDeviceBatteryStateUnknown    self.levelLabel.text = @“Unknown”；}else {    static NSNumberFormatter *numberFormatter = nil;    if (numberFormatter == nil) {        numberFormatter = [[NSNumberFormatter alloc] init];        [numberFormatter setNumberStyle:NSNumberFormatterPercentStyle];        [numberFormatter setMaximumFractionDigits:1];    }    NSNumber *levelObj = [NSNumber numberWithFloat:batteryLevel];    self.levelLabel.text = [numberFormatter stringFromNumber:levelObj];}

2.获取设备的电池状态

NSArray *state = @[@"未知",@"不插电的",@"充电的",@"充满电的"];    UIDeviceBatteryState currentState = [UIDevice currentDevice].batteryState;for (int i  = 0; i < [state count]; i++) {        if (i+UIDeviceBatteryStateUnknown== currentState) {            self.statelLabel.text = state[i];        }else{            self.stateLabel.text = nil;        }    }

3.注册通知中心，观察设备电量变化

[[NSNotificationCenter defaultCenter] addObserver:selfselector:@selector(batteryLevelChanged:)name:UIDeviceBatteryLevelDidChangeNotification object:nil];[[NSNotificationCenter defaultCenter] addObserver:selfselector:@selector(batteryStateChanged:)name:UIDeviceBatteryStateDidChangeNotification object:nil];

0 0