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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手机系统大小、可用空间大小#import // 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; }
+(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 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
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