一、获取设备内存大小方法
//返回存储内存占用比例
- (NSString *)getFreeDiskspaceRate{ float totalSpace;
float totalFreeSpace=.f; 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]/1024.0f/1024.0f/1024.0f;
totalFreeSpace = [freeFileSystemSizeInBytes floatValue]/1024.0f/1024.0f/1024.0f; //totalString、freeString是定义两个全局变量 进度条上显示大小数据用
totalString = [self getFileSizeString:[fileSystemSizeInBytes floatValue]];
freeString = [self getFileSizeString:[freeFileSystemSizeInBytes floatValue]];
NSLog(@"打印totalString：%@,freeString:%@",totalString,freeString); NSLog(@"Memory Capacity of %.2f GB with %.2f GB Free memory available.", totalSpace, totalFreeSpace); } else {
NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]); }
NSString *freeStr = [NSString stringWithFormat:@"%.3f",(totalSpace-totalFreeSpace)/totalSpace];//进度条比例
return freeStr;
}
//补充：另一种获取内存大小的方法
首先导入#include <sys/param.h>和#include <sys/mount.h>
方法：
NSFileManager *fm = [NSFileManager defaultManager];
NSDictionary *fat = [fm attributesOfFileSystemForPath:NSHomeDirectory() error:nil];
NSLog(@"容量：%lldG 可用容量：%lldG",[[fat objectForKey:NSFileSystemSize]longLongValue]/,[[fat objectForKey:NSFileSystemFreeSize]longLongValue]/);
struct statfs buf;
long long freespace = -;
if(statfs("/var", &buf) >= ){
freespace = (long long)(buf.f_bsize * buf.f_bfree);
}
NSLog(@"%@",[NSString stringWithFormat:@"手机剩余存储空间为：%qi GB" ,freespace///]);
二、转换内存大小为单位数值的方法（根据实际情况得到G、M、KB单位）
-(NSString *)getFileSizeString:(CGFloat)size
{
if (size>**){
return [NSString stringWithFormat:@"%.1fG",size///];//大于1G，则转化成G单位的字符串
}
else if(size<**&&size>=*)//大于1M，则转化成M单位的字符串
{
return [NSString stringWithFormat:@"%.1fM",size//];
}
else if(size>=&&size<*) //不到1M,但是超过了1KB，则转化成KB单位
{
return [NSString stringWithFormat:@"%.1fK",size/];
}
else//剩下的都是小于1K的，则转化成B单位
{
return [NSString stringWithFormat:@"%.1fB",size];
}
}
三、虚拟机上的效果图（这里截图显示的空间大小数值比较大，说明实际是电脑的内存情况，真机上显示就正常了）
四、其他
参考网址：http://www.bubuko.com/infodetail-922638.html