iOS常用公共方法

作者: jianshu_wl | 来源:发表于2016-05-26 14:16 被阅读8526次

1. 获取磁盘总空间大小

//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;
}

2. 获取磁盘可用空间大小

//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;
}

3. 获取指定路径下某个文件的大小

//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];
}

4. 获取文件夹下所有文件的大小

//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;
}

5. 获取字符串(或汉字)首字母

//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];
}

6. 将字符串数组按照元素首字母顺序进行排序分组

//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];
}

使用如下:

NSArray *arr = @[@"guangzhou", @"shanghai", @"北京", @"henan", @"hainan"];
NSDictionary *dic = [Utilities dictionaryOrderByCharacterWithOriginalArray:arr];
NSLog(@"\n\ndic: %@", dic);

输出结果如下:

�输出结果

7. 获取当前时间

//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]];
}

8. 计算上次日期距离现在多久, 如 xx 小时前、xx 分钟前等

/**
 *  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 @"";
}

使用如下:

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"]);

输出结果如下:

输出结果

9. 判断手机号码格式是否正确

//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;
        }
    }
}

10. 判断邮箱格式是否正确

//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];
}

11. 将十六进制颜色转换为 UIColor 对象

//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];
}

12. 对图片进行滤镜处理

#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;
}

13. 对图片进行�模糊处理

#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;
    }
}

14. 调整图片饱和度、亮度、对比度

/**
 *  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;
}

15. 创建一张实时模糊效果 View (毛玻璃效果)

//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;
}

16. 全屏截图

//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;
}

17. �截取�一张 view 生成图片

//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;
}

18. 截取view中某个区域生成一张图片

//截取view中某个区域生成一张图片
+ (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;
}

19. 压缩图片到指定尺寸大小

//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;
}

20. 压缩图片到指定文件大小

//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;
}

21. 获取设备 IP 地址

需要先引入下头文件:

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

代码:

//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;
}

22. �判断字符串中是否含有空格

+ (BOOL)isHaveSpaceInString:(NSString *)string{
    NSRange _range = [string rangeOfString:@" "];
    if (_range.location != NSNotFound) {
        return YES;
    }else {
        return NO;
    }
}

23. �判断字符串中是否含有�某个字符串

+ (BOOL)isHaveString:(NSString *)string1 InString:(NSString *)string2{
    NSRange _range = [string2 rangeOfString:string1];
    if (_range.location != NSNotFound) {
        return YES;
    }else {
        return NO;
    }
}

24. �判断字符串中是否含有��中文

+ (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;
}

25. �判断字符串是否全部为数字

+ (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;
}

26. 绘制虚线

/*
  ** 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;
}

27. 将字典对象转换为 JSON 字符串

+ (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;
}

28.将数组对象转换为 JSON 字符串

+ (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;
}

29. 获取 WiFi 信息

需要引入头文件:

#import <SystemConfiguration/CaptiveNetwork.h>

代码:

//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;
}

30. 获取广播地址、本机地址、子网掩码、端口信息

需要引入头文件:

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;
}

*若还有其它常用的公共方法, 请与我联系, 我会在这里添加您提供的方法, 并注明提供者信息, 以便能够更好的分享给大家使用! 欢迎大家积极提供! 谢谢! *

网友评论

何必轻言流年:很细致，谢谢作者分享。
903615cfd441:作者，你好问一下，第6个方法怎样获取Key值对应的Value呢?dict[@"B"];获取到的是空
903615cfd441:@jianshu_wl 谢谢，已经解决！
jianshu_wl:字典里面的 key、value 都是数组, 你这样取不对
GOOGxu:马克
羽辰梦:+ (NSString *)firstCharacterWithString:(NSString *)string
NSString *s = [XWTool firstCharacterWithString:@"呵呵"];
获取到的是A 这怎么解释啊？
羽辰梦:@jianshu_wl 好吧，没有解决这个问题的方法么？
jianshu_wl:微信也是这样
e2b0136199df:菜鸟福利， mark
83445de57a78:有用
攻城:
__________mo:mark~
你家毕老师:很有用，继续更新啊
KChuck:MARK
GiantForJade:666
asdfeng:获取 IP 地址那个支持 IPv6吗
瞬csr:写的太棒了
顺扬sky:mark
mile_zzz:mark
萌小菜:mark mark mark
HQFlying:好用多谢总结
好看的昵称:太有用了，谢谢大大
齐刘海姑娘: 哈喽~您的文章已收录专题【我不是程序猿，请叫我攻城狮】http://www.jianshu.com/collection/db91065b98c6，欢迎关注投稿哦~
kinmo:楼主，那个可用磁盘空间的方法，检测真机的时候，算出来的值会比系统设置里面显示的多200M左右。模拟器算出来的值是相近的。知道是什么原因吗？
kinmo:楼主，请问第三个方法获取的大小单位是什么？我传NSHomeDirectory()这个路径进去打印出来的是204，但是那个文件大小是77KB？？？
kinmo:@jianshu_wl 额(°_°)…好吧，搞到我还谷歌了好久
jianshu_wl:@July丶ye 这个问题, 其它app也一样, 像"爱奇艺"、"腾讯视频", 都会多出来200M左右. 具体原因不清楚. 不影响使用就行, 如果磁盘空间不足, 系统会提示清理空间的.
小凡凡520:楼主邮箱怎么验证出错啦输入 “chenfadflnk@q.com” 不是@qq.com
jianshu_wl:@小凡凡520 可以按自己的要求改一下正则表达式。
WillyGeek:感谢分享
kinmo:mark
0aaab0583f64:这是干什么的？
122971e34fcc:可以的
你的小福蝶:mark
BB区块链开发:6666
山水域:太棒了
19e797f82e62:不错
莫莫H:很不错，谢谢分享
lovedrose:好東西
昨夜雨轻栏:大部分都用过，实用派。
XDC:赞一个
我什么都不知道额:mark
無漾:mark
狗娃_:mark
i丶子木:嗯.以后会用到的
d5465e434539:好多对我有用的
bacon_iOS:mark
e74c5c710811:棒
以技术之名:傻瓜式教学，我喜欢⸔⸕
f3969479e601:mark
dcdb9e0934f1:mark
c0d75622ebf0:不错
AllenZYQ:nice
82aa66b02d24:看的一脸懵逼的我，我还以为是什么是使用上的小技巧。😂😂😂
jianshu_wl:@音桑
2a392233fc62:写的不错，先Mark下。
jianshu_wl:@noaicooder 多谢支持, 还有什么好的方法, 可以一起来完善!
邱读书:6. 将字符串数组按照元素首字母顺序进行排序分组中的Utilities 报错，是不是需要引入什么头文件？？？／
jianshu_wl:@邱读书这是我自己写的一个工具类, 里面放的是这些常用的公共方法, 用起来比较方便.
邱读书:@jianshu_wl 你那个Utilities 怎么来的？？？
jianshu_wl:@邱读书现在可以了, 这个方法是结合第5个方法使用的.
诸葛俊伟:请问你这是用oc写的吧？
jianshu_wl:@诸葛俊伟嗯嗯