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iOS页面响应、电量、流量分析

ming1016 edited this page Mar 28, 2016 · 2 revisions

页面响应

页面响应采用检测iOS的APP性能的一些方法里的子线程监控主线程方式就能够检测到。

电量

三种方式可以获取电量,分别是通过Instruments的Energy Diagnostics,UIDevice和IOKit framework

Instruments的Energy Diagnostics

可以获取到iphone特定时段的电量消耗信息。具体步骤: 打开Developer选项中的Start Logging —> 断开iphone与PC连接 —> 一系列的用户操作 —> Stop Logging —> 连接iphone与PC, 将电量消耗数据导入Instruments。

UIDevice

UIDevice提供了设备的详细信息,如systemVersion, batteryLevel等。

UIDevice.currentDevice.batteryMonitoringEnabled = true
let batteryLevel = UIDevice.currentDevice().batteryLevel
UIDevice.currentDevice.batteryMonitoringEnabled = false

IOKit framework

IOKit framework在IOS中用来跟硬件或内核服务通信,常用于获取硬件详细信息。 首先,需要将IOPowerSources.h,IOPSKeys.h,IOKit三个文件导入到工程中。把batteryMonitoringEnabled置为true,然后即可通过如下代码获取1%精确度的电量信息:

-(double) getBatteryLevel{
    // returns a blob of power source information in an opaque CFTypeRef
    CFTypeRef blob = IOPSCopyPowerSourcesInfo();
    // returns a CFArray of power source handles, each of type CFTypeRef
    CFArrayRef sources = IOPSCopyPowerSourcesList(blob);
    CFDictionaryRef pSource = NULL;
    const void *psValue;
    // returns the number of values currently in an array
    int numOfSources = CFArrayGetCount(sources);
    // error in CFArrayGetCount
    if (numOfSources == 0) {
        NSLog(@"Error in CFArrayGetCount");
        return -1.0f;
    }

    // calculating the remaining energy
    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 percentage;

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

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

        percentage = ((double) curCapacity / (double) maxCapacity * 100.0f);
        NSLog(@"curCapacity : %d / maxCapacity: %d , percentage: %.1f ", curCapacity, maxCapacity, percentage);
        return percentage;
    }
    return -1.0f;
}

流量

使用Instruments的Network来,这个工具它可以获取到各个线程每秒发送的字节数量,每秒接受字节数量,发包的数量和接收包的数量。跟踪 TCP/IP 和 UDP/IP 连接

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