获取手机系统大小、可用空间大小,设备可用内存及当前应用所占内存等

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设备可用内存及当前应用所占内存

// 获取当前设备可用内存及所占内存的头文件  
#import <sys/sysctl.h>  
#import <mach/mach.h>  // 获取当前设备可用内存(单位：MB）  
- (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;  }  return ((vm_page_size *vmStats.free_count) / 1024.0) / 1024.0;  
}  // 获取当前任务所占用的内存（单位：MB）  
- (double)usedMemory  
{  task_basic_info_data_t taskInfo;  mach_msg_type_number_t infoCount = TASK_BASIC_INFO_COUNT;  kern_return_t kernReturn = task_info(mach_task_self(),   TASK_BASIC_INFO,   (task_info_t)&taskInfo,   &infoCount);  if (kernReturn != KERN_SUCCESS  ) {  return NSNotFound;  }  return taskInfo.resident_size / 1024.0 / 1024.0;  
}

手机系统大小、可用空间大小

+(uint64_t)getFreeDiskspace {uint64_t totalSpace = 0.0f;uint64_t totalFreeSpace = 0.0f;NSError *error = nil;NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];if (dictionary) {NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];totalSpace = [fileSystemSizeInBytes floatValue];totalFreeSpace = [freeFileSystemSizeInBytes floatValue];NSLog(@"Memory Capacity of %llu GB with %llu GB Free memory available.", ((totalSpace/1024ll)/1024ll/1024ll), ((totalFreeSpace/1024ll)/1024ll/1024ll));} else {NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %d", [error domain], [error code]);}return totalFreeSpace;
}

其中