iOS常用的公共方法详解

//磁盘总空间
+ (cgfloat)diskofallsizembytes{
 cgfloat size = 0.0;
 nserror *error;
 nsdictionary *dic = [[nsfilemanager defaultmanager] attributesoffilesystemforpath:nshomedirectory() error:&error];
 if (error) {
#ifdef debug
 nslog(@"error: %@", error.localizeddescription);
#endif
 }else{
 nsnumber *number = [dic objectforkey:nsfilesystemsize];
 size = [number floatvalue]/1024/1024;
 }
 return size;
}

//磁盘可用空间
+ (cgfloat)diskoffreesizembytes{
 cgfloat size = 0.0;
 nserror *error;
 nsdictionary *dic = [[nsfilemanager defaultmanager] attributesoffilesystemforpath:nshomedirectory() error:&error];
 if (error) {
#ifdef debug
 nslog(@"error: %@", error.localizeddescription);
#endif
 }else{
 nsnumber *number = [dic objectforkey:nsfilesystemfreesize];
 size = [number floatvalue]/1024/1024;
 }
 return size;
}

//获取文件大小
+ (long long)filesizeatpath:(nsstring *)filepath{
 nsfilemanager *filemanager = [nsfilemanager defaultmanager];
 if (![filemanager fileexistsatpath:filepath]) return 0;
 return [[filemanager attributesofitematpath:filepath error:nil] filesize];
}

//获取文件夹下所有文件的大小
+ (long long)foldersizeatpath:(nsstring *)folderpath{
 nsfilemanager *filemanager = [nsfilemanager defaultmanager];
 if (![filemanager fileexistsatpath:folderpath]) return 0;
 nsenumerator *filesenumerator = [[filemanager subpathsatpath:folderpath] objectenumerator];
 nsstring *filename;
 long long folersize = 0;
 while ((filename = [filesenumerator nextobject]) != nil) {
 nsstring *filepath = [folderpath stringbyappendingpathcomponent:filename];
 folersize += [self filesizeatpath:filepath];
 }
 return folersize;
}

//获取字符串(或汉字)首字母
+ (nsstring *)firstcharacterwithstring:(nsstring *)string{
 nsmutablestring *str = [nsmutablestring stringwithstring:string];
 cfstringtransform((cfmutablestringref)str, null, kcfstringtransformmandarinlatin, no);
 cfstringtransform((cfmutablestringref)str, null, kcfstringtransformstripdiacritics, no);
 nsstring *pingyin = [str capitalizedstring];
 return [pingyin substringtoindex:1];
}

//将字符串数组按照元素首字母顺序进行排序分组
+ (nsdictionary *)dictionaryorderbycharacterwithoriginalarray:(nsarray *)array{
 if (array.count == 0) {
 return nil;
 }
 for (id obj in array) {
 if (![obj iskindofclass:[nsstring class]]) {
  return nil;
 }
 }
 uilocalizedindexedcollation *indexedcollation = [uilocalizedindexedcollation currentcollation];
 nsmutablearray *objects = [nsmutablearray arraywithcapacity:indexedcollation.sectiontitles.count];
 //创建27个分组数组
 for (int i = 0; i < indexedcollation.sectiontitles.count; i++) {
 nsmutablearray *obj = [nsmutablearray array];
 [objects addobject:obj];
 }
 nsmutablearray *keys = [nsmutablearray arraywithcapacity:objects.count];
 //按字母顺序进行分组
 nsinteger lastindex = -1;
 for (int i = 0; i < array.count; i++) {
 nsinteger index = [indexedcollation sectionforobject:array[i] collationstringselector:@selector(uppercasestring)];
 [[objects objectatindex:index] addobject:array[i]];
 lastindex = index;
 }
 //去掉空数组
 for (int i = 0; i < objects.count; i++) {
 nsmutablearray *obj = objects[i];
 if (obj.count == 0) {
  [objects removeobject:obj];
 }
 }
 //获取索引字母
 for (nsmutablearray *obj in objects) {
 nsstring *str = obj[0];
 nsstring *key = [self firstcharacterwithstring:str];
 [keys addobject:key];
 }
 nsmutabledictionary *dic = [nsmutabledictionary dictionary];
 [dic setobject:objects forkey:keys];
 return dic;
}
//获取字符串(或汉字)首字母
+ (nsstring *)firstcharacterwithstring:(nsstring *)string{
 nsmutablestring *str = [nsmutablestring stringwithstring:string];
 cfstringtransform((cfmutablestringref)str, null, kcfstringtransformmandarinlatin, no);
 cfstringtransform((cfmutablestringref)str, null, kcfstringtransformstripdiacritics, no);
 nsstring *pingyin = [str capitalizedstring];
 return [pingyin substringtoindex:1];
}

nsarray *arr = @[@"guangzhou", @"shanghai", @"北京", @"henan", @"hainan"];
nsdictionary *dic = [utilities dictionaryorderbycharacterwithoriginalarray:arr];
nslog(@"\n\ndic: %@", dic);

//获取当前时间
//format: @"yyyy-mm-dd hh:mm:ss"、@"yyyy年mm月dd日 hh时mm分ss秒"
+ (nsstring *)currentdatewithformat:(nsstring *)format{
 nsdateformatter *dateformatter = [[nsdateformatter alloc] init];
 [dateformatter setdateformat:format];
 return [dateformatter stringfromdate:[nsdate date]];
}

/**
 * 计算上次日期距离现在多久
 *
 * @param lasttime 上次日期(需要和格式对应)
 * @param format1  上次日期格式
 * @param currenttime 最近日期(需要和格式对应)
 * @param format2  最近日期格式
 *
 * @return xx分钟前、xx小时前、xx天前
 */
+ (nsstring *)timeintervalfromlasttime:(nsstring *)lasttime
      lasttimeformat:(nsstring *)format1
       tocurrenttime:(nsstring *)currenttime
      currenttimeformat:(nsstring *)format2{
 //上次时间
 nsdateformatter *dateformatter1 = [[nsdateformatter alloc]init];
 dateformatter1.dateformat = format1;
 nsdate *lastdate = [dateformatter1 datefromstring:lasttime];
 //当前时间
 nsdateformatter *dateformatter2 = [[nsdateformatter alloc]init];
 dateformatter2.dateformat = format2;
 nsdate *currentdate = [dateformatter2 datefromstring:currenttime];
 return [utilities timeintervalfromlasttime:lastdate tocurrenttime:currentdate];
}
+ (nsstring *)timeintervalfromlasttime:(nsdate *)lasttime tocurrenttime:(nsdate *)currenttime{
 nstimezone *timezone = [nstimezone systemtimezone];
 //上次时间
 nsdate *lastdate = [lasttime datebyaddingtimeinterval:[timezone secondsfromgmtfordate:lasttime]];
 //当前时间
 nsdate *currentdate = [currenttime datebyaddingtimeinterval:[timezone secondsfromgmtfordate:currenttime]];
 //时间间隔
 nsinteger intevaltime = [currentdate timeintervalsincereferencedate] - [lastdate timeintervalsincereferencedate];
 //秒、分、小时、天、月、年
 nsinteger minutes = intevaltime / 60;
 nsinteger hours = intevaltime / 60 / 60;
 nsinteger day = intevaltime / 60 / 60 / 24;
 nsinteger month = intevaltime / 60 / 60 / 24 / 30;
 nsinteger yers = intevaltime / 60 / 60 / 24 / 365;
 if (minutes <= 10) {
  return @"刚刚";
 }else if (minutes < 60){
  return [nsstring stringwithformat: @"%ld分钟前",(long)minutes];
 }else if (hours < 24){
  return [nsstring stringwithformat: @"%ld小时前",(long)hours];
 }else if (day < 30){
  return [nsstring stringwithformat: @"%ld天前",(long)day];
 }else if (month < 12){
  nsdateformatter * df =[[nsdateformatter alloc]init];
  df.dateformat = @"m月d日";
  nsstring * time = [df stringfromdate:lastdate];
  return time;
 }else if (yers >= 1){
  nsdateformatter * df =[[nsdateformatter alloc]init];
  df.dateformat = @"yyyy年m月d日";
  nsstring * time = [df stringfromdate:lastdate];
  return time;
 }
 return @"";
}

nslog(@"\n\nresult: %@", [utilities timeintervalfromlasttime:@"2015年12月8日 15:50"
lasttimeformat:@"yyyy年mm月dd日 hh:mm"
tocurrenttime:@"2015/12/08 16:12"
currenttimeformat:@"yyyy/mm/dd hh:mm"]);

//判断手机号码格式是否正确
+ (bool)valimobile:(nsstring *)mobile{
 mobile = [mobile stringbyreplacingoccurrencesofstring:@" " withstring:@""];
 if (mobile.length != 11)
 {
  return no;
 }else{
  /**
   * 移动号段正则表达式
   */
  nsstring *cm_num = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
  /**
   * 联通号段正则表达式
   */
  nsstring *cu_num = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
  /**
   * 电信号段正则表达式
   */
  nsstring *ct_num = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
  nspredicate *pred1 = [nspredicate predicatewithformat:@"self matches %@", cm_num];
  bool ismatch1 = [pred1 evaluatewithobject:mobile];
  nspredicate *pred2 = [nspredicate predicatewithformat:@"self matches %@", cu_num];
  bool ismatch2 = [pred2 evaluatewithobject:mobile];
  nspredicate *pred3 = [nspredicate predicatewithformat:@"self matches %@", ct_num];
  bool ismatch3 = [pred3 evaluatewithobject:mobile];
  if (ismatch1 || ismatch2 || ismatch3) {
   return yes;
  }else{
   return no;
  }
 }
}

//利用正则表达式验证
+ (bool)isavailableemail:(nsstring *)email {
 nsstring *emailregex = @"[a-z0-9a-z._%+-]+@[a-za-z0-9.-]+\\.[a-za-z]{2,4}";
 nspredicate *emailtest = [nspredicate predicatewithformat:@"self matches %@", emailregex];
 return [emailtest evaluatewithobject:email];
}

//将十六进制颜色转换为 uicolor 对象
+ (uicolor *)colorwithhexstring:(nsstring *)color{
 nsstring *cstring = [[color stringbytrimmingcharactersinset:[nscharacterset whitespaceandnewlinecharacterset]] uppercasestring];
 // string should be 6 or 8 characters
 if ([cstring length] < 6) {
  return [uicolor clearcolor];
 }
 // strip "0x" or "#" if it appears
 if ([cstring hasprefix:@"0x"])
  cstring = [cstring substringfromindex:2];
 if ([cstring hasprefix:@"#"])
  cstring = [cstring substringfromindex:1];
 if ([cstring length] != 6)
  return [uicolor clearcolor];
 // separate into r, g, b substrings
 nsrange range;
 range.location = 0;
 range.length = 2;
 //r
 nsstring *rstring = [cstring substringwithrange:range];
 //g
 range.location = 2;
 nsstring *gstring = [cstring substringwithrange:range];
 //b
 range.location = 4;
 nsstring *bstring = [cstring substringwithrange:range];
 // scan values
 unsigned int r, g, b;
 [[nsscanner scannerwithstring:rstring] scanhexint:&r];
 [[nsscanner scannerwithstring:gstring] scanhexint:&g];
 [[nsscanner scannerwithstring:bstring] scanhexint:&b];
 return [uicolor colorwithred:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}

#pragma mark - 对图片进行滤镜处理
// 怀旧 --> ciphotoeffectinstant       单色 --> ciphotoeffectmono
// 黑白 --> ciphotoeffectnoir       褪色 --> ciphotoeffectfade
// 色调 --> ciphotoeffecttonal       冲印 --> ciphotoeffectprocess
// 岁月 --> ciphotoeffecttransfer      铬黄 --> ciphotoeffectchrome
// cilineartosrgbtonecurve, cisrgbtonecurvetolinear, cigaussianblur, ciboxblur, cidiscblur, cisepiatone, cidepthoffield
+ (uiimage *)filterwithoriginalimage:(uiimage *)image filtername:(nsstring *)name{
 cicontext *context = [cicontext contextwithoptions:nil];
 ciimage *inputimage = [[ciimage alloc] initwithimage:image];
 cifilter *filter = [cifilter filterwithname:name];
 [filter setvalue:inputimage forkey:kciinputimagekey];
 ciimage *result = [filter valueforkey:kcioutputimagekey];
 cgimageref cgimage = [context createcgimage:result fromrect:[result extent]];
 uiimage *resultimage = [uiimage imagewithcgimage:cgimage];
 cgimagerelease(cgimage);
 return resultimage;
}

#pragma mark - 对图片进行模糊处理
// cigaussianblur ---> 高斯模糊
// ciboxblur  ---> 均值模糊(available in ios 9.0 and later)
// cidiscblur  ---> 环形卷积模糊(available in ios 9.0 and later)
// cimedianfilter ---> 中值模糊, 用于消除图像噪点, 无需设置radius(available in ios 9.0 and later)
// cimotionblur ---> 运动模糊, 用于模拟相机移动拍摄时的扫尾效果(available in ios 9.0 and later)
+ (uiimage *)blurwithoriginalimage:(uiimage *)image blurname:(nsstring *)name radius:(nsinteger)radius{
 cicontext *context = [cicontext contextwithoptions:nil];
 ciimage *inputimage = [[ciimage alloc] initwithimage:image];
 cifilter *filter;
 if (name.length != 0) {
  filter = [cifilter filterwithname:name];
  [filter setvalue:inputimage forkey:kciinputimagekey];
  if (![name isequaltostring:@"cimedianfilter"]) {
   [filter setvalue:@(radius) forkey:@"inputradius"];
  }
  ciimage *result = [filter valueforkey:kcioutputimagekey];
  cgimageref cgimage = [context createcgimage:result fromrect:[result extent]];
  uiimage *resultimage = [uiimage imagewithcgimage:cgimage];
  cgimagerelease(cgimage);
  return resultimage;
 }else{
  return nil;
 }
}

/**
 * 调整图片饱和度, 亮度, 对比度
 *
 * @param image  目标图片
 * @param saturation 饱和度
 * @param brightness 亮度: -1.0 ~ 1.0
 * @param contrast 对比度
 *
 */
+ (uiimage *)colorcontrolswithoriginalimage:(uiimage *)image
         saturation:(cgfloat)saturation
         brightness:(cgfloat)brightness
         contrast:(cgfloat)contrast{
 cicontext *context = [cicontext contextwithoptions:nil];
 ciimage *inputimage = [[ciimage alloc] initwithimage:image];
 cifilter *filter = [cifilter filterwithname:@"cicolorcontrols"];
 [filter setvalue:inputimage forkey:kciinputimagekey];
 [filter setvalue:@(saturation) forkey:@"inputsaturation"];
 [filter setvalue:@(brightness) forkey:@"inputbrightness"];
 [filter setvalue:@(contrast) forkey:@"inputcontrast"];
 ciimage *result = [filter valueforkey:kcioutputimagekey];
 cgimageref cgimage = [context createcgimage:result fromrect:[result extent]];
 uiimage *resultimage = [uiimage imagewithcgimage:cgimage];
 cgimagerelease(cgimage);
 return resultimage;
}

//avilable in ios 8.0 and later
+ (uivisualeffectview *)effectviewwithframe:(cgrect)frame{
 uiblureffect *effect = [uiblureffect effectwithstyle:uiblureffectstylelight];
 uivisualeffectview *effectview = [[uivisualeffectview alloc] initwitheffect:effect];
 effectview.frame = frame;
 return effectview;
}

//全屏截图
+ (uiimage *)shotscreen{
 uiwindow *window = [uiapplication sharedapplication].keywindow;
 uigraphicsbeginimagecontext(window.bounds.size);
 [window.layer renderincontext:uigraphicsgetcurrentcontext()];
 uiimage *image = uigraphicsgetimagefromcurrentimagecontext();
 uigraphicsendimagecontext();
 return image;
}

//截取view生成一张图片
+ (uiimage *)shotwithview:(uiview *)view{
 uigraphicsbeginimagecontext(view.bounds.size);
 [view.layer renderincontext:uigraphicsgetcurrentcontext()];
 uiimage *image = uigraphicsgetimagefromcurrentimagecontext();
 uigraphicsendimagecontext();
 return image;
}

+ (uiimage *)shotwithview:(uiview *)view scope:(cgrect)scope{
 cgimageref imageref = cgimagecreatewithimageinrect([self shotwithview:view].cgimage, scope);
 uigraphicsbeginimagecontext(scope.size);
 cgcontextref context = uigraphicsgetcurrentcontext();
 cgrect rect = cgrectmake(0, 0, scope.size.width, scope.size.height);
 cgcontexttranslatectm(context, 0, rect.size.height);//下移
 cgcontextscalectm(context, 1.0f, -1.0f);//上翻
 cgcontextdrawimage(context, rect, imageref);
 uiimage *image = uigraphicsgetimagefromcurrentimagecontext();
 uigraphicsendimagecontext();
 cgimagerelease(imageref);
 cgcontextrelease(context);
 return image;
}

//压缩图片到指定尺寸大小
+ (uiimage *)compressoriginalimage:(uiimage *)image tosize:(cgsize)size{
 uiimage *resultimage = image;
 uigraphicsbeginimagecontext(size);
 [resultimage drawinrect:cgrectmake(0, 0, size.width, size.height)];
 uigraphicsendimagecontext();
 return resultimage;
}

//压缩图片到指定文件大小
+ (nsdata *)compressoriginalimage:(uiimage *)image tomaxdatasizekbytes:(cgfloat)size{
 nsdata *data = uiimagejpegrepresentation(image, 1.0);
 cgfloat datakbytes = data.length/1000.0;
 cgfloat maxquality = 0.9f;
 cgfloat lastdata = datakbytes;
 while (datakbytes > size && maxquality > 0.01f) {
  maxquality = maxquality - 0.01f;
  data = uiimagejpegrepresentation(image, maxquality);
  datakbytes = data.length/1000.0;
  if (lastdata == datakbytes) {
   break;
  }else{
   lastdata = datakbytes;
  }
 }
 return data;
}

#import <ifaddrs.h>
#import <arpa/inet.h>

//获取设备 ip 地址
+ (nsstring *)getipaddress {
 nsstring *address = @"error";
 struct ifaddrs *interfaces = null;
 struct ifaddrs *temp_addr = null;
 int success = 0;
 success = getifaddrs(&interfaces);
 if (success == 0) {
  temp_addr = interfaces;
  while(temp_addr != null) {
   if(temp_addr->ifa_addr->sa_family == af_inet) {
    if([[nsstring stringwithutf8string:temp_addr->ifa_name] isequaltostring:@"en0"]) {
     address = [nsstring stringwithutf8string:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
    }
   }
   temp_addr = temp_addr->ifa_next;
  }
 }
 freeifaddrs(interfaces);
 return address;
}

+ (bool)ishavespaceinstring:(nsstring *)string{
 nsrange _range = [string rangeofstring:@" "];
 if (_range.location != nsnotfound) {
  return yes;
 }else {
  return no;
 }
}

+ (bool)ishavestring:(nsstring *)string1 instring:(nsstring *)string2{
 nsrange _range = [string2 rangeofstring:string1];
 if (_range.location != nsnotfound) {
  return yes;
 }else {
  return no;
 }
}

+ (bool)ishavechineseinstring:(nsstring *)string{
 for(nsinteger i = 0; i < [string length]; i++){
  int a = [string characteratindex:i];
  if (a > 0x4e00 && a < 0x9fff) {
   return yes;
  }
 }
 return no;
}

+ (bool)isallnum:(nsstring *)string{
 unichar c;
 for (int i=0; i<string.length; i++) {
  c=[string characteratindex:i];
  if (!isdigit(c)) {
   return no;
  }
 }
 return yes;
}

/*
 ** lineframe:  虚线的 frame
 ** length:  虚线中短线的宽度
 ** spacing:  虚线中短线之间的间距
 ** color:   虚线中短线的颜色
*/
+ (uiview *)createdashedlinewithframe:(cgrect)lineframe
       linelength:(int)length
       linespacing:(int)spacing
       linecolor:(uicolor *)color{
 uiview *dashedline = [[uiview alloc] initwithframe:lineframe];
 dashedline.backgroundcolor = [uicolor clearcolor];
 cashapelayer *shapelayer = [cashapelayer layer];
 [shapelayer setbounds:dashedline.bounds];
 [shapelayer setposition:cgpointmake(cgrectgetwidth(dashedline.frame) / 2, cgrectgetheight(dashedline.frame))];
 [shapelayer setfillcolor:[uicolor clearcolor].cgcolor];
 [shapelayer setstrokecolor:color.cgcolor];
 [shapelayer setlinewidth:cgrectgetheight(dashedline.frame)];
 [shapelayer setlinejoin:kcalinejoinround];
 [shapelayer setlinedashpattern:[nsarray arraywithobjects:[nsnumber numberwithint:length], [nsnumber numberwithint:spacing], nil]];
 cgmutablepathref path = cgpathcreatemutable();
 cgpathmovetopoint(path, null, 0, 0);
 cgpathaddlinetopoint(path, null, cgrectgetwidth(dashedline.frame), 0);
 [shapelayer setpath:path];
 cgpathrelease(path);
 [dashedline.layer addsublayer:shapelayer];
 return dashedline;
}

+ (nsstring *)jsonprettystringencoded:(nsdictionary *)dictionary{
 if ([nsjsonserialization isvalidjsonobject:dictionary ]) {
  nserror *error;
  nsdata *jsondata = [nsjsonserialization datawithjsonobject:dictionary options:nsjsonwritingprettyprinted error:&error];
  if (!error) {
   nsstring *json = [[nsstring alloc] initwithdata:jsondata encoding:nsutf8stringencoding];
   return json;
  }
 }
 return nil;
}

+ (nsstring *)jsonprettystringencoded:(nsarray *)array{
 if ([nsjsonserialization isvalidjsonobject:array]) {
  nserror *error;
  nsdata *jsondata = [nsjsonserialization datawithjsonobject:array options:nsjsonwritingprettyprinted error:&error];
  if (!error) {
   nsstring *json = [[nsstring alloc] initwithdata:jsondata encoding:nsutf8stringencoding];
   return json;
  }
 }
 return nil;
}

//获取 wifi 信息
- (nsdictionary *)fetchssidinfo {
 nsarray *ifs = (__bridge_transfer nsarray *)cncopysupportedinterfaces();
 if (!ifs) {
  return nil;
 }
 nsdictionary *info = nil;
 for (nsstring *ifnam in ifs) {
  info = (__bridge_transfer nsdictionary *)cncopycurrentnetworkinfo((__bridge cfstringref)ifnam);
  if (info && [info count]) { break; }
 }
 return info;
}

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px menlo; color: #ff4647}span.s1 {font-variant-ligatures: no-common-ligatures; color: #eb905a}span.s2 {font-variant-ligatures: no-common-ligatures}
#import <ifaddrs.h>
#import <arpa/inet.h>

//获取广播地址、本机地址、子网掩码、端口信息
- (nsmutabledictionary *)getlocalinfoforcurrentwifi {
 nsmutabledictionary *dict = [nsmutabledictionary dictionary];
 struct ifaddrs *interfaces = null;
 struct ifaddrs *temp_addr = null;
 int success = 0;
 // retrieve the current interfaces - returns 0 on success
 success = getifaddrs(&interfaces);
 if (success == 0) {
  // loop through linked list of interfaces
  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"]) {
     //广播地址
     nsstring *broadcast = [nsstring stringwithutf8string:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)];
     if (broadcast) {
      [dict setobject:broadcast forkey:@"broadcast"];
     }
//     nslog(@"broadcast address--%@",broadcast);
     //本机地址
     nsstring *localip = [nsstring stringwithutf8string:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
     if (localip) {
      [dict setobject:localip forkey:@"localip"];
     }
//     nslog(@"local device ip--%@",localip);
     //子网掩码地址
     nsstring *netmask = [nsstring stringwithutf8string:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];
     if (netmask) {
      [dict setobject:netmask forkey:@"netmask"];
     }
//     nslog(@"netmask--%@",netmask);
     //--en0 端口地址
     nsstring *interface = [nsstring stringwithutf8string:temp_addr->ifa_name];
     if (interface) {
      [dict setobject:interface forkey:@"interface"];
     }
//     nslog(@"interface--%@",interface);
     return dict;
    }
   }
   temp_addr = temp_addr->ifa_next;
  }
 }
 // free memory
 freeifaddrs(interfaces);
 return dict;
}