發現網上計算磁盤大小都不準確,所以自己總結了一下,與騰訊手機管家的對比過,數值一樣
- iOS11才出的方法,只適合 iOS11
- 在 iOS11 中 1G == 1000M 而不是1024M, iOS11 之前是 1024
if (@available(iOS 11.0, *)) {
NSDictionary *results = [fileURL resourceValuesForKeys:@[NSURLVolumeAvailableCapacityForImportantUsageKey] error:&error];
if (!results) {
NSLog(@"Error retrieving resource keys: %@%@",[error localizedDescription], [error userInfo]);
abort();
}
NSLog(@"Available capacity for important usage: %@",results);
} else {
// Fallback on earlier versions
}
- 自己寫的方法
// 空余硬盤大小
+ (CGFloat)freeDiskSpaceInBytes{
CGFloat totalFreeSpace = 0.0;
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
if (dictionary) {
NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
totalFreeSpace = [freeFileSystemSizeInBytes floatValue];
NSLog(@" %f GB Free memory available.", ((totalFreeSpace/1024.f)/1024.f)/1024.f);
} else {
NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
}
if (@available(iOS 11.0, *)) {
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:NSTemporaryDirectory()];
NSDictionary *results = [fileURL resourceValuesForKeys:@[NSURLVolumeAvailableCapacityForImportantUsageKey] error:&error];
if (!results) {
NSLog(@"Error retrieving resource keys: %@%@",[error localizedDescription], [error userInfo]);
abort();
}
NSLog(@"Available capacity for important usage: %lf",[[results objectForKey:NSURLVolumeAvailableCapacityForImportantUsageKey] floatValue]);
totalFreeSpace = [[results objectForKey:NSURLVolumeAvailableCapacityForImportantUsageKey] floatValue];
} else {
}
return totalFreeSpace;
}
// 總共硬盤大小
+ (CGFloat)totalDiskSpace{
CGFloat totalSpace = 0.0;
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];
totalSpace = [fileSystemSizeInBytes floatValue];
NSLog(@"Memory Capacity of %f GB .", ((totalSpace/1024.f)/1024.f/1024.f));
} else {
NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
}
return totalSpace;
}
- 轉換
+(NSString *)fileSizeToString:(CGFloat)fileSize
{
NSInteger KB;
if (iOS11Later) {
KB = 1000.f;
}else{
KB = 1024.f;
}
NSInteger MB = KB*KB;
NSInteger GB = MB*KB;
if (fileSize < 10.f) {
return @"0 B";
}else if (fileSize < KB) {
return @"< 1 KB";
}else if (fileSize < MB) {
return [NSString stringWithFormat:@"%.1f KB",((float)fileSize)/KB];
}else if (fileSize < GB) {
return [NSString stringWithFormat:@"%.1f MB",((float)fileSize)/MB];
}else {
return [NSString stringWithFormat:@"%.1f GB",((float)fileSize)/GB];
}
}
