//获得指定文件距离上次修改时间是否达到了指定值(秒)timeout
+(BOOL)isTimeout:(NSString *)path time:(NSTimeInterval)timeout
{
//获得当前时间
NSTimeInterval now = [[NSDate date] timeIntervalSince1970];
NSDictionary *dict = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:nil];
// 取得了文件上次修改的时间
NSDate *d = [dict objectForKey:NSFileModificationDate];
if (now-[d timeIntervalSince1970]>timeout) {
return YES;
}
return NO;
}
//计算文件夹下文件的总大小
+(float)fileSizeForDir:(NSString*)path
{
NSFileManager *fileManager = [NSFileManager defaultManager];
//记录总值
unsigned long long totalSize =0;
//获得指定路径path的所有内容(文件和文件夹)
NSArray* array = [fileManager contentsOfDirectoryAtPath:path error:nil];
for(int i = 0; i<[array count]; i++)
{
//拼接全路径
NSString *fullPath = [path stringByAppendingPathComponent:[array objectAtIndex:i]];
BOOL isDir;
//如果指定路径存在并且不是文件夹
//NSLog(@"fullPath:%@",fullPath);
//先判断是否存在，再判断是文件夹还是文件
if ([fileManager fileExistsAtPath:fullPath isDirectory:&isDir] && !isDir)
{
//获得文件属性
NSDictionary *fileAttributeDic=[fileManager attributesOfItemAtPath:fullPath error:nil];
totalSize+=[[fileAttributeDic objectForKey:NSFileSize] unsignedLongLongValue];
}
else
{
//如果是文件夹，递归
totalSize+=[self fileSizeForDir:fullPath];
}
}
return totalSize;
}