[英]Can not make path to the file in Swift
I try to open the file in Swift. 我尝试在Swift中打开文件。 For it I create the file path. 为此,我创建了文件路径。 It doesn't work. 没用
maaaacy:~ $ pwd
/Users/tsypa
maaaacy:~ $ cat a.txt
test
maaaacy:~ $ ./a.swift
nil!
maaaacy:~ $
The script: 剧本:
#!/usr/bin/xcrun swift
import Foundation
var filePath = NSBundle.mainBundle().pathForResource("a", ofType: "txt", inDirectory: "/Users/tsypa")
if let file = filePath {
println("file path \(file)")
// reading content of the file will be here
} else {
println("nil!")
}
What's wrong? 怎么了?
When using Swift REPL, the NSBundle.mainBundle()
's path actually points to: 使用Swift REPL时, NSBundle.mainBundle()
的路径实际上指向:
/Applications/Xcode6-Beta6.app/Contents/SharedFrameworks/LLDB.framework/Versions/A/Resources
You may have to use NSFileManager instead: 您可能必须改用NSFileManager :
let manager = NSFileManager.defaultManager()
if manager.fileExistsAtPath("/Users/tsypa/a.txt") {
// file exists, read
} else {
// file doesn't exist
}
Note: You can actually automatically expand tilde in the path to avoid hardcoding the full user's home path: 注意:实际上,您可以自动在路径中扩展代字号,以避免对完整用户的主路径进行硬编码:
"~/a.txt".stringByExpandingTildeInPath // prints /Users/<your user>/a.txt
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