获取手机电池状态，手机内存总容量大小，当前可用容量，手机IP地址，手机当前所连接Wi-Fi的名称

闲来没事 研究一写开发中不常用的知识，直接上代码

//  ViewController.m

//  GetMemory
//
//  Created by 冯闯 on 17/4/25.
//  Copyright © 2017年冯闯. All rights reserved.
//

#import "ViewController.h"
#include <sys/mount.h>//获取手机磁盘容量
#import <SystemConfiguration/CaptiveNetwork.h>//获取手机当前Wi-Fi名称
#import <ifaddrs.h>//获取手机IP
#import <arpa/inet.h>//获取手机IP
#define USER_APP_PATH @“/ User / Applications /”

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self getTotalDiskSize];
    [self getAvailableDiskSize];
    [self getWifiName];
    [self getvsion];
    [self deviceIPAdress];
    [self getBatteryQuantity];
}
//******************************************************
//获取手机磁盘总容量
-(long long)getTotalDiskSize
{
    struct statfs buf;
    unsigned long long freeSpace = -1;
    if (statfs("/var", &buf) >=0)
    {
        freeSpace = (unsignedlong long)(buf.f_bsize* buf.f_blocks);
    }
    NSLog(@"手机总容量%@",[selffileSizeToString:freeSpace]);
    return freeSpace;
}

//获取手机磁盘当前可用容量
-(long long)getAvailableDiskSize
{
    struct statfs buf;
    unsigned long long freeSpace = -1;
    if (statfs("/var", &buf) >=0)
    {
        freeSpace = (unsignedlong long)(buf.f_bsize * buf.f_bavail);
    }
    NSLog(@"手机可用容量%@",[selffileSizeToString:freeSpace]);
    return freeSpace;
}

-(NSString *)fileSizeToString:(unsignedlong long)fileSize
{
    NSInteger KB = 1024;
    NSInteger MB = KB*KB;
    NSInteger GB = MB*KB;
   
    if (fileSize < 10)  {
        return @"0 B";
    }else if (fileSize < KB)    {
        return @"< 1 KB";
    }else if (fileSize < MB)    {
        return [NSString stringWithFormat:@"%.1f KB",((CGFloat)fileSize)/KB];
    }else if (fileSize < GB)    {
        return [NSString stringWithFormat:@"%.1f MB",((CGFloat)fileSize)/MB];
    }else  {
        return [NSString stringWithFormat:@"%.1f GB",((CGFloat)fileSize)/GB];
    }
}
//******************************************************

//获取手机当前所连接Wi-Fi的名称

- (NSString *)getWifiName
{
    NSString *wifiName = nil;
    CFArrayRef wifiInterfaces = CNCopySupportedInterfaces();
    if (!wifiInterfaces) {
        return nil;
    }
    NSArray *interfaces = (__bridgeNSArray *)wifiInterfaces;
    for (NSString *interfaceName in interfaces) {
        CFDictionaryRefdictRef = CNCopyCurrentNetworkInfo((__bridgeCFStringRef)(interfaceName));
       
        if (dictRef) {
            NSDictionary*networkInfo = (__bridgeNSDictionary *)dictRef;
           
            wifiName = [networkInfo objectForKey:(__bridgeNSString *)kCNNetworkInfoKeySSID];
           
            CFRelease(dictRef);
        }
    }
    CFRelease(wifiInterfaces);
    NSLog(@"手机连接Wi-Fi名称是:%@",wifiName);
   
    return wifiName;
}

//******************************************************
//获取手机当前系统版本

-(CGFloat)getvsion{
 CGFloat vsion =   [[[UIDevicecurrentDevice]systemVersion]floatValue] ;
    NSLog(@"手机系用版本：%f",vsion);
    return vsion;
}

//******************************************************
//获取手机IP
- (NSString *)deviceIPAdress {
    NSString *address = @"an error occurred when obtaining ip address";
    struct ifaddrs *interfaces =NULL;
    struct ifaddrs *temp_addr =NULL;
    int success = 0;
    success = getifaddrs(&interfaces);
    if (success == 0) {// 0 表示获取成功
        temp_addr = interfaces;
        while (temp_addr != NULL) {
            if( temp_addr->ifa_addr->sa_family== AF_INET) {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name]isEqualToString:@"en0"]) {
                    // Get NSString from C String
                    address = [NSStringstringWithUTF8String:inet_ntoa(((structsockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    freeifaddrs(interfaces);
    NSLog(@"手机IP地址：%@",address);
    return address;
}

//******************************************************
//获取电池电量
-(CGFloat)getBatteryQuantity
{
    NSLog(@"手机当前电量：%f",[[UIDevicecurrentDevice] batteryLevel]);
    return [[UIDevice currentDevice] batteryLevel];
}

@end