本例中服务器返回的是base64 字符串，也可以直接返回byte[]，看server接口的定义
拿到nsData以后，把pdf写到device
使用webview显示PDF
let nsData = NSData(base64Encoded: data!!)
拿到nsData以后，把pdf写到device
let theData = ServiceProxy().CallGetPayslipFile(recordId: payslip.recordId)//"204586"
var docURL = (FileManager.default.urls(for: .documentDirectory,in: .userDomainMask)).last as NSURL?
docURL = docURL?.appendingPathComponent( "myPayslip.pdf")! as NSURL?
//Lastly,write your file to the disk.
theData.write(to: docURL! as URL,atomically: true)
使用webview显示PDF
func loadPDF(filename: String) {
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,.userDomainMask,true)[0]
let filePath = "\(documentsPath)/\(filename)"
let url = NSURL(fileURLWithPath: filePath)
let urlRequest = NSURLRequest(url: url as URL)
webView.loadRequest(urlRequest as URLRequest)
}
