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 }

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;

 }

    returnsize;
}
   

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);

   
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:

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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"]);
9. 判断手机号码格式是否正确
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//判断手机号码格式是否正确
+ (BOOL)valiMobile:(NSString*)mobile{
    mobile= [mobile stringByReplacingOccurrencesOfString:@" " withString:@""];
    if(mobile.length!= 11)
    {
        returnNO;
    }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];
        BOOLisMatch1 =[pred1 evaluateWithObject:mobile];
        NSPredicate*pred2 =[NSPredicate predicateWithFormat:@"SELF MATCHES %@",CU_NUM];
        BOOLisMatch2 =[pred2 evaluateWithObject:mobile];
        NSPredicate*pred3 =[NSPredicate predicateWithFormat:@"SELF MATCHES %@",CT_NUM];
        BOOLisMatch3 =[pred3 evaluateWithObject:mobile];
 
        if(isMatch1|| isMatch2|| isMatch3){
            returnYES;
        }else{
            returnNO;
        }
    }
}

10. 判断邮箱格式是否正确

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//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

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//将十六进制颜色转换为 UIColor 对象
+ (UIColor*)colorWithHexString:(NSString*)color{
    NSString*cString =[[color stringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]] uppercaseString];
    // String should be 6 or 8 characters
    if([cStringlength]< 6){
        return[UIColorclearColor];
    }
    // strip "0X" or "#" if it appears
    if([cString hasPrefix:@"0X"])
        cString= [cString substringFromIndex:2];
    if([cString hasPrefix:@"#"])
        cString= [cString substringFromIndex:1];
    if([cStringlength]!= 6)
        return[UIColorclearColor];
    // Separate into r, g, b substrings
    NSRangerange;
    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
    unsignedint 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

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#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 =[[CIImagealloc] initWithImage:image];
    CIFilter*filter =[CIFilter filterWithName:name];
    [filter setValue:inputImage forKey:kCIInputImageKey];
    CIImage*result =[filter valueForKey:kCIOutputImageKey];
    CGImageRefcgImage =[context createCGImage:result fromRect:[resultextent]];
    UIImage*resultImage =[UIImage imageWithCGImage:cgImage];
    CGImageRelease(cgImage);
    returnresultImage;
}

13. 对图片进行模糊处理

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#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 =[[CIImagealloc] 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];
        CGImageRefcgImage =[context createCGImage:result fromRect:[resultextent]];
        UIImage*resultImage =[UIImage imageWithCGImage:cgImage];
        CGImageRelease(cgImage);
        returnresultImage;
    }else{
        returnnil;
    }
}

14. 调整图片饱和度、亮度、对比度

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/**
*  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 =[[CIImagealloc] 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];
    CGImageRefcgImage =[context createCGImage:result fromRect:[resultextent]];
    UIImage*resultImage =[UIImage imageWithCGImage:cgImage];
    CGImageRelease(cgImage);
    returnresultImage;
}

15. 创建一张实时模糊效果 View (毛玻璃效果)

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//Avilable in iOS 8.0 and later
+ (UIVisualEffectView*)effectViewWithFrame:(CGRect)frame{
    UIBlurEffect*effect =[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    UIVisualEffectView*effectView =[[UIVisualEffectViewalloc] initWithEffect:effect];
    effectView.frame= frame;
    returneffectView;
}

16. 全屏截图

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//全屏截图
+ (UIImage*)shotScreen{
    UIWindow*window =[UIApplicationsharedApplication].keyWindow;
    UIGraphicsBeginImageContext(window.bounds.size);
    [window.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage*image =UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    returnimage;
}

17. 截取一张 view 生成图片

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//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();
    returnimage;
}

18. 截取view中某个区域生成一张图片

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//截取view中某个区域生成一张图片
+ (UIImage*)shotWithView:(UIView*)view scope:(CGRect)scope{
    CGImageRefimageRef =CGImageCreateWithImageInRect([self shotWithView:view].CGImage,scope);
    UIGraphicsBeginImageContext(scope.size);
    CGContextRefcontext =UIGraphicsGetCurrentContext();
    CGRectrect =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);
    returnimage;
}

19. 压缩图片到指定尺寸大小

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//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();
    returnresultImage;
}

20. 压缩图片到指定文件大小

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//压缩图片到指定文件大小
+ (NSData*)compressOriginalImage:(UIImage*)image toMaxDataSizeKBytes:(CGFloat)size{
    NSData*data =UIImageJPEGRepresentation(image,1.0);
    CGFloatdataKBytes =data.length/1000.0;
    CGFloatmaxQuality =0.9f;
    CGFloatlastData =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;
        }
    }
    returndata;
}
21. 获取设备 IP 地址

需要先引入下头文件:

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

代码:

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//获取设备 IP 地址
+ (NSString*)getIPAddress{
    NSString*address =@"error";
    structifaddrs *interfaces= NULL;
    structifaddrs *temp_addr= NULL;
    intsuccess =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(((structsockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr= temp_addr->ifa_next;
        }
    }
    freeifaddrs(interfaces);
    returnaddress;
}

22. 判断字符串中是否含有空格

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+(BOOL)isHaveSpaceInString:(NSString*)string{
    NSRange_range =[string rangeOfString:@" "];
    if(_range.location!= NSNotFound){
        returnYES;
    }else{
        returnNO;
    }
}

23. 判断字符串中是否含有某个字符串

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+(BOOL)isHaveString:(NSString*)string1 InString:(NSString*)string2{
    NSRange_range =[string2 rangeOfString:string1];
    if(_range.location!= NSNotFound){
        returnYES;
    }else{
        returnNO;
    }
}

24. 判断字符串中是否含有中文

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+(BOOL)isHaveChineseInString:(NSString*)string{
    for(NSIntegeri =0;i <[string length];i++){
        inta =[string characterAtIndex:i];
        if(a> 0x4e00&& a< 0x9fff){
            returnYES;
        }
    }
    returnNO;
}

25. 判断字符串是否全部为数字

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+(BOOL)isAllNum:(NSString*)string{
    unicharc;
    for(inti=0;i<string.length;i++){
        c=[string characterAtIndex:i];
        if(!isdigit(c)){
            returnNO;
        }
    }
    returnYES;
}

26. 绘制虚线

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/*
  ** 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 =[[UIViewalloc] initWithFrame:lineFrame];
    dashedLine.backgroundColor= [UIColorclearColor];
    CAShapeLayer*shapeLayer =[CAShapeLayerlayer];
    [shapeLayer setBounds:dashedLine.bounds];
    [shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame)/ 2,CGRectGetHeight(dashedLine.frame))];
    [shapeLayer setFillColor:[UIColorclearColor].CGColor];
    [shapeLayer setStrokeColor:color.CGColor];
    [shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
    [shapeLayer setLineJoin:kCALineJoinRound];
    [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length],[NSNumber numberWithInt:spacing],nil]];
    CGMutablePathRefpath =CGPathCreateMutable();
    CGPathMoveToPoint(path,NULL,0,0);
    CGPathAddLineToPoint(path,NULL,CGRectGetWidth(dashedLine.frame),0);
    [shapeLayer setPath:path];
    CGPathRelease(path);
    [dashedLine.layer addSublayer:shapeLayer];
    returndashedLine

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