objective-c 如何获取给定路径的文件大小？
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How to get the file size given a path?
提问by hekevintran
I have a path to file contained in an NSString. Is there a method to get its file size?
我有一个包含在 NSString 中的文件路径。有没有办法获得它的文件大小？
回答by Oded Ben Dov
This one liner can help people:
这种衬垫可以帮助人们：
unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:someFilePath error:nil] fileSize];
This returns the file size in Bytes.
这将返回以字节为单位的文件大小。
回答by Frank Shearar
Bear in mind that fileAttributesAtPath:traverseLink: is deprecated as of Mac OS X v10.5. Use attributesOfItemAtPath:error:instead, described at the same URLthesamet mentions.
请记住，fileAttributesAtPath:traverseLink: 自 Mac OS X v10.5 起已弃用。attributesOfItemAtPath:error:改为使用，在相同的 URL 中描述。
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:
需要注意的是，我是一个 Objective-C 新手，并且我忽略了调用中可能发生的错误attributesOfItemAtPath:error:，您可以执行以下操作：
NSString *yourPath = @"Whatever.txt";
NSFileManager *man = [NSFileManager defaultManager];
NSDictionary *attrs = [man attributesOfItemAtPath: yourPath error: NULL];
UInt32 result = [attrs fileSize];
回答by Tyler Long
In case some one needs a Swift version:
如果有人需要 Swift 版本：
let attr: NSDictionary = try! NSFileManager.defaultManager().attributesOfItemAtPath(path)
print(attr.fileSize())
回答by Parag Bafna
CPU raises with attributesOfItemAtPath:error:
You should use stat.
CPU 使用 attributesOfItemAtPath:error:
你应该使用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);
回答by Sk Borhan Uddin
If you want only file size with bytes just use,
如果你只想使用字节的文件大小，
unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:nil] fileSize];
NSByteCountFormatterstring conversion of filesize (from Bytes) with precise KB, MB, GB ... Its returns like 120 MBor 120 KB
NSByteCountFormatter文件大小（从字节）的字符串转换与精确的 KB、MB、GB ......它的返回像120 MB或120 KB
NSError *error = nil;
NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:yourAssetPath error:&error];
if (attrs) {
NSString *string = [NSByteCountFormatter stringFromByteCount:fileSize countStyle:NSByteCountFormatterCountStyleBinary];
NSLog(@"%@", string);
}
回答by Apollo
Following the answer from Oded Ben Dov, I would rather use an object here:
按照 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]];
回答by Bill Chan
Swift 2.2:
斯威夫特 2.2：
do {
let attr: NSDictionary = try NSFileManager.defaultManager().attributesOfItemAtPath(path)
print(attr.fileSize())
} catch {
print(error)
}
回答by Akshay Phulare
It will give File size in Byte...
它将以字节为单位给出文件大小...
uint64_t fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:_filePath error:nil] fileSize];
回答by Denis Kreshikhin
Swift4:
斯威夫特4：
let attributes = try! FileManager.default.attributesOfItem(atPath: path)
let fileSize = attributes[.size] as! NSNumber
回答by d0ping
In Swift 3.x and above you can use:
在 Swift 3.x 及更高版本中，您可以使用：
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)")
}
