IOS obtains the code snippet of the device's remaining Bucket

First, introduce the relevant header file. The header file code is as follows:

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

The function for obtaining the remaining bucket is as follows:

+ (Nsstring *) freediskspaceinbytes {struct statfs Buf; long freespace =-1; if (statfs ("/Var", & BUF)> = 0) {freespace = (long) (BUF. f_bsize * Buf. f_bfree);} return [nsstring stringwithformat: @ "remaining mobile phone storage space: % Qi MB", freespace/1024/1024];}

IOS obtains the code snippet of the current device type:

- (NSString *) platformString{    // Gets a string with the device model    size_t size;    sysctlbyname("hw.machine", NULL, &size, NULL, 0);    char *machine = malloc(size);    sysctlbyname("hw.machine", machine, &size, NULL, 0);    NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];    free(machine);    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 2G";    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4";    if ([platform isEqualToString:@"iPhone3,2"])    return @"iPhone 4";    if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";    if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5";    if ([platform isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";        if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch (1 Gen)";    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch (2 Gen)";    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch (3 Gen)";    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch (4 Gen)";    if ([platform isEqualToString:@"iPod5,1"])      return @"iPod Touch (5 Gen)";        if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";    if ([platform isEqualToString:@"iPad1,2"])      return @"iPad 3G";    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2";    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";    if ([platform isEqualToString:@"iPad2,4"])      return @"iPad 2";    if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";    if ([platform isEqualToString:@"iPad2,6"])      return @"iPad Mini";    if ([platform isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3";    if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";    if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 4";    if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";        if ([platform isEqualToString:@"i386"])         return @"Simulator";    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";    return platform;}