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 

 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  #import 

 //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

 /* ** 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  #import  

 //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; }