iOS 绘制电池获取系统电量

前言

公司的一款新产品要求自己画一个电池并调用,搜索了一下发现画电池和调用的部分基本都是分开的,东西不算难,整理一下方便同行使用,菜鸟一枚,如有不对的地方欢迎指正.

一 如何使用

使用方式比较简单,首先要引用两个文件

import "IOPSKeys.h"

import "IOPowerSources.h"

只要定义一个View就可以了,电池大小根据需求

- (void)viewDidLoad {

    [super viewDidLoad];

    self.batteryView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 30, 15)];

    [self drawBattery:self.batteryView];

    [self.view addSubview:self.batteryView];

}

下面的部分复制可用,也可根据自己的习惯改写.

二 Bezier曲线画电池

- (void)drawBattery: (UIView *)view {

//绘制电池

    UIBezierPath *path1 = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, view.frame.size.width * 49 / 50, view.frame.size.height) cornerRadius:2];

    CAShapeLayer *batteryLayer = [CAShapeLayer layer];

    batteryLayer.lineWidth = 1;

    batteryLayer.strokeColor = [UIColor blackColor].CGColor;

    batteryLayer.fillColor = [UIColor whiteColor].CGColor;

    batteryLayer.path = [path1 CGPath];

    [view.layer addSublayer:batteryLayer];

    UIBezierPath *path2 = [UIBezierPath bezierPath];

    [path2 moveToPoint:CGPointMake(view.frame.size.width * 49 / 50 + 1, view.frame.size.height / 3)];

    [path2 addLineToPoint:CGPointMake(view.frame.size.width * 49 / 50 + 1, view.frame.size.height * 2 / 3)];

    CAShapeLayer *layer2 = [CAShapeLayer layer];

    layer2.lineWidth = view.frame.size.width / 50;

    layer2.strokeColor = [UIColor blackColor].CGColor;

    layer2.fillColor = [UIColor blackColor].CGColor;

    layer2.path = [path2 CGPath];

    [view.layer addSublayer:layer2];

    //绘制电量

    UIView *eleView = [[UIView alloc] initWithFrame:CGRectMake(1, 1, 0, view.frame.size.height - 2)];

    eleView.layer.cornerRadius = 2;

    NSInteger ele = [self getCurrentBatteryLevel];

    if (ele <= 20) {

        eleView.backgroundColor = [UIColor redColor];

    } else {

        eleView.backgroundColor = [UIColor greenColor];

    }

    [view addSubview:eleView];

    //绘制数字电量

    UILabel *eleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, view.frame.size.width, self.batteryView.frame.size.height)];

    eleLabel.backgroundColor = [UIColor clearColor];

    eleLabel.font = [UIFont systemFontOfSize:12];

    eleLabel.textAlignment = NSTextAlignmentCenter;

    eleLabel.text = [NSString stringWithFormat:@"%ld%@", (long)ele, @"%"];

    [view addSubview:eleLabel];

    [self runProgress:view.frame.size.width * 49 / 5000 * ele - 2 view:eleView];//bleBattery为电池电量

}

三 调用系统电量

- (NSInteger)getCurrentBatteryLevel {

    CFTypeRef blob = IOPSCopyPowerSourcesInfo();

    CFArrayRef sources = IOPSCopyPowerSourcesList(blob);

    CFDictionaryRef pSource = NULL;

    const void *psValue;

    NSInteger numOfSources = CFArrayGetCount(sources);

    if (numOfSources == 0) {

    NSLog(@"Error in CFArrayGetCount");

    return -1.0f;

}

    int curCapacity = 0;

    for (int i = 0 ; i < numOfSources ; i++) {

        //Returns a CFDictionary with readable information about the specific power source.

        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 -curCapacity;

}

四 填充电量

- (void)runProgress:(NSInteger)progressValue view:(UIView *)view {

[UIView animateWithDuration:1 animations:^{

CGRect frame = view.frame;

frame.size.width = progressValue;

view.frame = frame;

}];

}

五 引用库

需要引用库IOKit.可以自己下载或者加QQ:346991576备注IOKit发给你