swift string转为html,将字符串编码为HTML字符串Swift 3

func testEscape()throws {

let text = "Hello &<> Å å π 新 there ¾ © »"

let escapedAscii = Entities.escape(text, OutputSettings().encoder(String.Encoding.ascii).escapeMode(Entities.EscapeMode.base))

let escapedAsciiFull = Entities.escape(text, OutputSettings().charset(String.Encoding.ascii).escapeMode(Entities.EscapeMode.extended))

let escapedAsciiXhtml = Entities.escape(text, OutputSettings().charset(String.Encoding.ascii).escapeMode(Entities.EscapeMode.xhtml))

let escapedUtfFull = Entities.escape(text, OutputSettings().charset(String.Encoding.utf8).escapeMode(Entities.EscapeMode.extended))

let escapedUtfMin = Entities.escape(text, OutputSettings().charset(String.Encoding.utf8).escapeMode(Entities.EscapeMode.xhtml))

XCTAssertEqual("Hello &<> Å å π 新 there ¾ © »", escapedAscii)

XCTAssertEqual("Hello &<> &angst; å π 新 there ¾ © »", escapedAsciiFull)

XCTAssertEqual("Hello &<> Å å π 新 there ¾ © »", escapedAsciiXhtml)

XCTAssertEqual("Hello &<> Å å π 新 there ¾ © »", escapedUtfFull)

XCTAssertEqual("Hello &<> Å å π 新 there ¾ © »", escapedUtfMin)

// odd that it's defined as aring in base but angst in full

// round trip

XCTAssertEqual(text, try Entities.unescape(escapedAscii))

XCTAssertEqual(text, try Entities.unescape(escapedAsciiFull))

XCTAssertEqual(text, try Entities.unescape(escapedAsciiXhtml))

XCTAssertEqual(text, try Entities.unescape(escapedUtfFull))

XCTAssertEqual(text, try Entities.unescape(escapedUtfMin))

}