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

设备可用内存及当前应用所占内存

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// 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

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+(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

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attributesOfFileSystemForPath:error:

返回的是一个字典。感兴趣的同学可用自己看下里面的其他信息