check enough space on iphone device before downloading files

Question

right now i am able to download remote files successfully,

but this is only if user can select one file if user select multiple file names and press download. So before downloading files i want to check is there enough space on iphone if yes then download and if not then user can see message box "not enough space" and he will uncheck few filename and then he can download files from server...

is there any way to check free space before downloading?

thank you in advance

score 19 · Answer 1 · edited Jan 15 '15 at 09:19

19

+ (long long)getFreeSpace {  
long long freeSpace = 0.0f;  
NSError *error = nil;  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];  

if (dictionary) {  
    NSNumber *fileSystemFreeSizeInBytes = [dictionary objectForKey: NSFileSystemFreeSize];  
    freeSpace = [fileSystemFreeSizeInBytes longLongValue];  
} else { 
  //Handle error
}  
return freeSpace; }

Use this code to query the filesystem for available free space.

edited Jan 15 '15 at 09:19

Deniss Fedotovs

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answered Mar 15 '11 at 10:46

Saurabh G

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NSFileSystemFreeSize is determined by statfs(). It should give the value for f_bavail, which is declared as long instead of float. This answer would be better to return long and call [fileSystemFreeSizeInBytes longValue] instead of floatValue. – Adam Lockhart Jun 18 '13 at 19:10

score 8 · Accepted Answer · edited Oct 01 '14 at 12:16

8

Use this function:

#include <sys/param.h>  
#include <sys/mount.h>  

+(float) diskSpace {  
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
    struct statfs tStats;  
    statfs([[paths lastObject] cString], &tStats);  
    float total_space = (float)(tStats.f_blocks * tStats.f_bsize);  

    return total_space;  

    // for freespace:
    // float free_space = (float)(tStats.f_bavail * tStats.f_bsize);
    // return free_space
}

edited Oct 01 '14 at 12:16

chakrit

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answered Mar 15 '11 at 10:44

Max

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this will give you total space, not free available. Replace f_blocks with f_bavail – Jan Gressmann Dec 10 '11 at 01:57
I agree with Jan Gressmann, should be changed if it is the excepted answer. – Matthew Ferguson Aug 15 '14 at 23:25
Edited it in as comments. – chakrit Oct 01 '14 at 12:16

check enough space on iphone device before downloading files

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