+(UIViewController *)findNearsetViewController:(UIView *)view;+(unsigned long long)fileSizeForPath:(NSString *)path;+(BOOL)checkStrIsSpecial:(NSString *)str;+(BOOL)checkPhoneStr:(NSString *)str;+(BOOL)isSystemVersioniOS8;+(BOOL)isAllowedNotification;+(BOOL)stringContainsEmoji:(NSString *)string;+(BOOL)isAllowPhoto;+(BOOL)isAllowTakePhoto;+(BOOL)isBlankString:(NSString *)string;+(int)backAlertViewNumber;//+(CAGradientLayer *)shadowAsInverse;//替换null  == ""+(NSDictionary *)nullDic:(NSDictionary *)myDic;+(NSArray *)nullArr:(NSArray *)myArr;+(NSString *)stringToString:(NSString *)string;+(NSString *)nullToString;+(id)changeType:(id)myObj;

//*************************************************//

> +(UIViewController *)findNearsetViewController:(UIView *)view {    UIViewController *viewController = nil;    for (UIView *next = [view superview]; next; next = next.superview) {        UIResponder *nextResponder = [next nextResponder];        if ([nextResponder isKindOfClass:[UIViewController class]]) {            viewController = (UIViewController *)nextResponder;            break;        }    }    return viewController;}

/**

• 得到目标路径文件的大小

• @param path 文件路径

• @return 文件大小

  */

  > +(unsigned long long)fileSizeForPath:(NSString *)path {

  signed long long fileSize = 0;   NSFileManager *fileManager = [NSFileManager new]; // default is not thread safe   if ([fileManager fileExistsAtPath:path]) {       NSError *error = nil;       NSDictionary *fileDict = [fileManager attributesOfItemAtPath:path error:&error];       if (!error && fileDict) {           fileSize = [fileDict fileSize];       }   }   return fileSize;

  }

//判断特殊字符

> + (BOOL)checkStrIsSpecial:(NSString *)str{    NSArray *arr = [NSArray arrayWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K",@"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z",@"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",nil];    for (int i = 0; i < str.length; i++) {        NSString *checkStr = [str substringWithRange:NSMakeRange(i, 1)];        NSString *newCheckStr = [checkStr uppercaseString];        if (![arr containsObject:newCheckStr] ) {            return NO;        }    }    return YES;}

//判断是否全是数字

> +(BOOL)checkPhoneStr:(NSString *)str{    NSArray *arr = [NSArray arrayWithObjects:@"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",nil];    for (int i = 0; i < str.length; i++) {        NSString *checkStr = [str substringWithRange:NSMakeRange(i, 1)];        if (![arr containsObject:checkStr] ) {            return NO;        }    }    return YES;}

//判断系统

> +(BOOL)isSystemVersioniOS8{    //check systemVersion of device    UIDevice *device = [UIDevice currentDevice];    float sysVersion = [device.systemVersion floatValue];    if (sysVersion >= 8.0) {        return YES;    }    return NO;}

//判断 是否开启通知

> +(BOOL)isAllowedNotification{    if ([CommonTool isSystemVersioniOS8]) {//ios8        UIUserNotificationSettings *setting = [[UIApplication sharedApplication] currentUserNotificationSettings];        if (UIUserNotificationTypeNone != setting.types) {            return YES;        }    }else{//ios7        UIRemoteNotificationType type = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];        if (UIRemoteNotificationTypeNone != type) {            return YES;        }    }    return NO;}

//判断是否有emoji表情

> +(BOOL)stringContainsEmoji:(NSString *)string{    __block BOOL returnValue = NO;        [string enumerateSubstringsInRange:NSMakeRange(0, [string length])                               options:NSStringEnumerationByComposedCharacterSequences                            usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {                                const unichar hs = [substring characterAtIndex:0];                                if (0xd800 <= hs && hs <= 0xdbff) {                                    if (substring.length > 1) {                                        const unichar ls = [substring characterAtIndex:1];                                        const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;                                        if (0x1d000 <= uc && uc <= 0x1f77f) {                                            returnValue = YES;                                        }                                    }                                } else if (substring.length > 1) {                                    const unichar ls = [substring characterAtIndex:1];                                    if (ls == 0x20e3) {                                        returnValue = YES;                                    }                                } else {                                    if (0x2100 <= hs && hs <= 0x27ff) {                                        returnValue = YES;                                    } else if (0x2B05 <= hs && hs <= 0x2b07) {                                        returnValue = YES;                                    } else if (0x2934 <= hs && hs <= 0x2935) {                                        returnValue = YES;                                    } else if (0x3297 <= hs && hs <= 0x3299) {                                        returnValue = YES;                                    } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {                                        returnValue = YES;                                    }                                }                            }];    return returnValue;}

//判断 是否有相册权限

> +(BOOL)isAllowPhoto{    ALAuthorizationStatus author = [ALAssetsLibrary authorizationStatus];    if (author == ALAuthorizationStatusRestricted || author == ALAuthorizationStatusDenied)    {        //无权限        return NO;    }    return YES;}

//判断 是否有拍照权限

> +(BOOL)isAllowTakePhoto{    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];    if (authStatus == AVAuthorizationStatusRestricted || authStatus ==AVAuthorizationStatusDenied)    {        //无权限        return NO;    }    return YES;}

//判断字符串空和 空格

> +(BOOL)isBlankString:(NSString *)string{    if (string == nil) {        return YES;    }    if (string == NULL) {        return YES;    }    if ([string isKindOfClass:[NSNull class]]) {        return YES;    }    if ([[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length]==0) {        return YES;    }    return NO;}

//返回window上有几个alertview

> +(int)backAlertViewNumber{     AppDelegate *appDelegate=[[UIApplication sharedApplication] delegate];    int count = 0;    for (UIWindow* window in [UIApplication sharedApplication].windows) {        for (UIView* view in window.subviews) {            if ([view isKindOfClass:[UIAlertView class]]) {                count ++;            }        }    }    return count;}

//使用cagradientlayer设置view的渐变效果

> +(CAGradientLayer *)shadowAsInverse{    CAGradientLayer *newShadow = [[CAGradientLayer alloc] init];    CGRect newShadowFrame = CGRectMake(0, 0, 320, );    newShadow.frame = newShadowFrame;    //添加渐变的颜色组合    newShadow.colors = [NSArray arrayWithObjects:(id)[UIColor whiteColor].CGColor,(id)[UIColor blackColor].CGColor,nil];    return newShadow;}

//将NSDictionary中的Null类型的项目转化成@""

> +(NSDictionary *)nullDic:(NSDictionary *)myDic{    NSArray *keyArr = [myDic allKeys];    NSMutableDictionary *resDic = [[NSMutableDictionary alloc]init];    for (int i = 0; i < keyArr.count; i ++)    {        id obj = [myDic objectForKey:keyArr[i]];                obj = [self changeType:obj];                [resDic setObject:obj forKey:keyArr[i]];    }    return resDic;}

//将NSDictionary中的Null类型的项目转化成@""

> +(NSArray *)nullArr:(NSArray *)myArr{    NSMutableArray *resArr = [[NSMutableArray alloc] init];    for (int i = 0; i < myArr.count; i ++)    {        id obj = myArr[i];                obj = [self changeType:obj];                [resArr addObject:obj];    }    return resArr;}

//将NSString类型的原路返回

> +(NSString *)stringToString:(NSString *)string{    return string;}

//将Null类型的项目转化成@""

> +(NSString *)nullToString{    return @"";}

//类型识别:将所有的NSNull类型转化成@""

> +(id)changeType:(id)myObj{    if ([myObj isKindOfClass:[NSDictionary class]])    {        return [self nullDic:myObj];    }    else if([myObj isKindOfClass:[NSArray class]])    {        return [self nullArr:myObj];    }    else if([myObj isKindOfClass:[NSString class]])    {        return [self stringToString:myObj];    }    else if([myObj isKindOfClass:[NSNull class]])    {        return [self nullToString];    }    else    {        return myObj;    }}