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//  UIDevice+Manager.h




#import <mach/mach.h>

@interface  (DiskManager)

- (BOOL)availableDiskSpace;

@end

//  UIDevice+DiskManager.m

#import "UIDevice+Manager.h"

@implementation  (DiskManager)

- (BOOL)availableDiskSpace{
    if ([self availableMemory] > 0) {
        return TRUE;
    }
    return FALSE;
}


- (double)availableMemory{
    vm_statistics_data_t vmStats;
    mach_msg_type_number_t infoCount = HOST_VM_INFO_COUNT;
    kern_return_t kernReturn = host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&vmStats, &infoCount);
    if (kernReturn != KERN_SUCCESS ) {
        return NSNotFound;
    }
    double availableMem = ((vm_page_size* vmStats.free_count) / 1024.0)/1024.0;
    NSLog(@"可使用内存大小为: %f",availableMem);
    return availableMem;
}



@end