检查设备剩余内存

#pragma mark 检查设备剩余内存

-(void)usedSpaceAndfreeSpace

{

    NSFileManager* fileManager = [[NSFileManager alloc ]init];

    NSDictionary *fileSysAttributes = [fileManager attributesOfFileSystemForPath:DocumentsPath error:nil];

    NSNumber *freeSpace = [fileSysAttributes objectForKey:NSFileSystemFreeSize];

    NSNumber *totalSpace = [fileSysAttributes objectForKey:NSFileSystemSize];

    NSString  * str= [NSString stringWithFormat:@"已占用%0.1fG/剩余%0.1fG",([totalSpace longLongValue] - [freeSpace longLongValue])/1024.0/1024.0/1024.0,[freeSpace longLongValue]/1024.0/1024.0/1024.0];

    NSLog(@"--------%@",str);

}

--------已占用359.1G/剩余571.6G