问题遇到的现象和发生背景
有如下文本
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x000000000123456 0x1abcdef + 12345
1 libsystem_kernel.dylib 0x000000000123452 0x1abcdef + 12345
Thread 1 name: com.apple.thread.kindtwo
Thread 1:
0 CoreFoundation.dylib 0x000000000123456 0x1abcdef + 12345
Thread 2:
0 Foundation 0x000000000123456 0x1abcdef + 12345
1 CFNetwork 0x000000000123456 0x1abcdef + 12345
希望通过正则拆分获取每个Thread所属的内容段
问题相关代码,请勿粘贴截图
// string
let content =
"""
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x000000000123456 0x1abcdef + 12345
1 libsystem_kernel.dylib 0x000000000123452 0x1abcdef + 12345
Thread 1 name: com.apple.thread.kindtwo
Thread 1:
0 CoreFoundation.dylib 0x000000000123456 0x1abcdef + 12345
Thread 2:
0 Foundation 0x000000000123456 0x1abcdef + 12345
1 CFNetwork 0x000000000123456 0x1abcdef + 12345
"""
// regex
let pattern = "\\s+?Thread\\s+(\\d+)+(?:\\s+name:\\s+(.*)$)(?:\\sThread\\s+\\d+\\s?(Crashed)?:$)?\\n(.*?)(?:\\n\\s*\\n|$)"
let re = try! Regex(pattern, options: [.anchorsMatchLines, .caseInsensitive])
print(re.findAll(content))
extension String {
subscript (r: Range<Int>) -> String? {
get {
let nsRange = NSRange(r)
return self.substring(with: nsRange)
}
}
func matchGroups(fromResult result: NSTextCheckingResult) -> [String] {
let number = result.numberOfRanges
if number == 1 {
if let range = Range(result.range(at:0)) {
if let subString = self[range] {
return [subString]
}
}
return []
}
var groups = [String]()
for index in 1..<number {
if let range = Range(result.range(at: index)) {
groups.append(self[range] ?? "")
}
}
return groups
}
var nsRange: NSRange {
return NSRange(self.startIndex..<self.endIndex, in: self)
}
func substring(with nsrange: NSRange) -> String? {
guard let range = Range(nsrange, in: self) else { return nil }
return String(self[range])
}
}
public struct Regex {
let regex: NSRegularExpression
public init(_ pattern: String,
options: NSRegularExpression.Options = []) throws {
try regex = NSRegularExpression(pattern: pattern,
options: options)
}
public func findFirst(_ string: String,
options: NSRegularExpression.MatchingOptions = []) -> [String]? {
guard let ret = regex.firstMatch(in: string,
options: options,
range: string.nsRange) else {
return nil
}
return string.matchGroups(fromResult: ret)
}
public func findAll(_ string: String,
options: NSRegularExpression.MatchingOptions = []) -> [[String]]? {
let ret = regex.matches(in: string,
options: options,
range: string.nsRange)
guard ret.count != 0 else { return nil }
return ret.map { string.matchGroups(fromResult: $0) }
}
public func match(_ string: String,
options: NSRegularExpression.MatchingOptions = []) -> [String]? {
findFirst(string, options: options)
}
public func findFirstRange(_ string: String,
options: NSRegularExpression.MatchingOptions = []) -> NSRange? {
let nsRange = string.nsRange
let range = regex.rangeOfFirstMatch(in: string, options: options, range: nsRange)
guard range.location < (nsRange.location + nsRange.length) else {
return nil
}
return range
}
public func findAllRange(_ string: String,
options: NSRegularExpression.MatchingOptions = []) -> [NSRange]? {
let matches = regex.matches(in: string, options: options, range: string.nsRange)
guard matches.count != 0 else { return nil }
return matches.map { $0.range }
}
}
运行结果及报错内容
Optional([["1", "com.apple.thread.kindtwo", "0 CoreFoundation.dylib 0x000000000123456 0x1abcdef + 12345"]])
我的解答思路和尝试过的方法
我知道([\\w\\W\\s]*)
可以匹配多行,但是由于开头都比较类似,所以一旦用了([\\w\\W\\s]*)
不论结尾怎么写都无法在下一个Thread之前停下捕获~
我想要达到的结果
[
["0", "Dispatch queue: com.apple.main-thread", "Crashed", "0 libsystem_kernel.dylib 0x000000000123456 0x1abcdef + 12345\n1 libsystem_kernel.dylib 0x000000000123456 0x1abcdef + 12345"],
["1", "com.apple.thread.kindtwo", "", "CoreFoundation.dylib 0x000000000123456 0x1abcdef + 12345"],
["2", "", "", "0 Foundation 0x000000000123456 0x1abcdef + 12345\n1 CFNetwork 0x000000000123456 0x1abcdef + 12345"]
]