I have a path to file contained in an NSString. Is there a method to get its file size?
This one liner can help people:
unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:someFilePath error:nil] fileSize];
This returns the file size in Bytes.
Bear in mind that fileAttributesAtPath:traverseLink: is deprecated as of Mac OS X v10.5. Use attributesOfItemAtPath:error:
instead, described at the same URL thesamet mentions.
With the caveat that I'm an Objective-C newbie, and I'm ignoring errors that might occur in calling attributesOfItemAtPath:error:
, you can do the following:
NSString *yourPath = @"Whatever.txt";
NSFileManager *man = [NSFileManager defaultManager];
NSDictionary *attrs = [man attributesOfItemAtPath: yourPath error: NULL];
UInt32 result = [attrs fileSize];
In case some one needs a Swift version:
let attr: NSDictionary = try! NSFileManager.defaultManager().attributesOfItemAtPath(path)
print(attr.fileSize())
CPU raises with attributesOfItemAtPath:error:
You should use stat .
#import <sys/stat.h>
struct stat stat1;
if( stat([inFilePath fileSystemRepresentation], &stat1) ) {
// something is wrong
}
long long size = stat1.st_size;
printf("Size: %lld\n", stat1.st_size);
根据Oded Ben Dov的回答,我宁愿在这里使用一个对象:
NSNumber * mySize = [NSNumber numberWithUnsignedLongLong:[[[NSFileManager defaultManager] attributesOfItemAtPath:someFilePath error:nil] fileSize]];
If you want only file size with bytes just use,
unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:nil] fileSize];
NSByteCountFormatter string conversion of filesize (from Bytes) with precise KB, MB, GB ... Its returns like 120 MB
or 120 KB
NSError *error = nil;
NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:&error];
if (attrs) {
NSString *string = [NSByteCountFormatter stringFromByteCount:fileSize countStyle:NSByteCountFormatterCountStyleBinary];
NSLog(@"%@", string);
}
Swift 2.2:
do {
let attr: NSDictionary = try NSFileManager.defaultManager().attributesOfItemAtPath(path)
print(attr.fileSize())
} catch {
print(error)
}
它将以字节为单位给出文件大小...
uint64_t fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:_filePath error:nil] fileSize];
Swift4:
let attributes = try! FileManager.default.attributesOfItem(atPath: path)
let fileSize = attributes[.size] as! NSNumber
In Swift 3.x and above you can use:
do {
//return [FileAttributeKey : Any]
let attr = try FileManager.default.attributesOfItem(atPath: filePath)
fileSize = attr[FileAttributeKey.size] as! UInt64
//or you can convert to NSDictionary, then get file size old way as well.
let attrDict: NSDictionary = try FileManager.default.attributesOfItem(atPath: filePath) as NSDictionary
fileSize = dict.fileSize()
} catch {
print("Error: \(error)")
}
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