UIUtils的常用方法(格式化字符串/计算文件的大小)

//获取Documents下文件的路径

+ (NSString *)pathOfDocument:(NSString *)fileName {

    NSString *p = [NSString stringWithFormat:@"Documents/%@",fileName];

    NSString *homePath = NSHomeDirectory(); //获取沙盒的根路径

    NSString *path = [homePath stringByAppendingPathComponent:p];

    NSLog(@"%@",path);

    return path;

}

//删除指定路径的文件

+ (BOOL)deleteFile:(NSString *)path {

    NSFileManager *fileManager = [NSFileManager defaultManager];

    if ([fileManager fileExistsAtPath:path]) {

        return [fileManager removeItemAtPath:path error:nil];

    }

    return NO;

}

//将字符串格式化成日期对象

+ (NSDate *)dateFromString:(NSString *)datestring formate:(NSString *)formate {

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setDateFormat:formate];

    NSDate *date = [dateFormatter dateFromString:datestring];

    [dateFormatter release];

    return date;

}

//将日期格式化成字符串对象

+ (NSString *)stringFromDate:(NSDate *)date formate:(NSString *)formate {

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setDateFormat:formate];

    NSString *datestring = [dateFormatter stringFromDate:date];

    [dateFormatter release];

    return datestring;

}

//计算目录下面所有文件的大小

+ (long long)countDirectorySize:(NSString *)directory {

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSArray *fileNames = [fileManager subpathsOfDirectoryAtPath:directory error:nil];

    long long sum = 0;

    for (NSString *name in fileNames) {

        NSString *filePath = [directory stringByAppendingPathComponent:name];

        NSDictionary *attribute = [fileManager attributesOfItemAtPath:filePath error:nil];

//        NSNumber *filesize = [attribute objectForKey:NSFileSize];

        long long size = [attribute fileSize];

        sum += size;

    }

    return sum;

}

UIUtils的常用方法(格式化字符串/计算文件的大小)

原文：http://blog.csdn.net/xhm294304668/article/details/19424607