{"id":655,"date":"2023-05-29T14:39:27","date_gmt":"2023-05-29T06:39:27","guid":{"rendered":"https:\/\/www.zhidianwl.com\/zhidian\/?p=655"},"modified":"2023-05-29T14:39:27","modified_gmt":"2023-05-29T06:39:27","slug":"%e5%9c%a8ios%e4%b8%8a%e7%bb%98%e5%88%b6%e8%87%aa%e7%84%b6%e7%9a%84%e7%ad%be%e5%90%8d%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.zhidianwl.com\/zhidian\/2023\/655\/","title":{"rendered":"\u5728ios\u4e0a\u7ed8\u5236\u81ea\u7136\u7684\u7b7e\u540d\u600e\u4e48\u5b9e\u73b0\uff1f"},"content":{"rendered":"
\u5728iOS\u4e0a\u7ed8\u5236\u81ea\u7136\u7684\u7b7e\u540d\u662f\u4e00\u9879\u975e\u5e38\u6709\u8da3\u7684\u4efb\u52a1\uff0c\u56e0\u4e3a\u8fd9\u9700\u8981\u6211\u4eec\u5229\u7528\u89e6\u6478\u4e8b\u4ef6\u548c\u753b\u5e03\u6280\u672f\u6765\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u6807\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Swift\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u7b7e\u540d\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
\u7b7e\u540d\u5e94\u7528\u7a0b\u5e8f\u7684\u57fa\u672c\u539f\u7406\u662f\u5c06\u89e6\u6478\u4e8b\u4ef6\u8f6c\u6362\u4e3a\u7ebf\u6bb5\uff0c\u7136\u540e\u5c06\u8fd9\u4e9b\u7ebf\u6bb5\u7ed8\u5236\u5728\u753b\u5e03\u4e0a\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528UIBezierPath\u5bf9\u8c61\u6765\u7ed8\u5236\u7ebf\u6bb5\uff0c\u5e76\u5728UIView\u5b50\u7c7b\u4e2d\u5b9e\u73b0\u89e6\u6478\u4e8b\u4ef6\u7684\u5904\u7406\u7a0b\u5e8f\u6765\u6355\u83b7\u7528\u6237\u7684\u624b\u52bf\u3002<\/p>\n
\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u201cSignatureView\u201d\u7684UIView\u5b50\u7c7b\uff0c\u8be5\u7c7b\u5c06\u8d1f\u8d23\u7ed8\u5236\u7b7e\u540d\u3002\u6211\u4eec\u5c06\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u6dfb\u52a0\u4e00\u4e2aUIBezierPath\u5bf9\u8c61\uff0c\u4ee5\u4fbf\u6211\u4eec\u53ef\u4ee5\u8ddf\u8e2a\u7528\u6237\u7684\u624b\u52bf\u8f68\u8ff9\u3002\u6211\u4eec\u8fd8\u5c06\u6dfb\u52a0\u4e00\u4e2a\u6355\u83b7\u89e6\u6478\u4e8b\u4ef6\u7684\u5904\u7406\u7a0b\u5e8f\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u4ee3\u7801\uff1a<\/p>\n
“`swift<\/p>\n
import UIKit<\/p>\n
class SignatureView: UIView {<\/p>\n<\/p>\n
var path = UIBezierPath()<\/p>\n<\/p>\n
override func touchesBegan(_ touches: Set, with event: UIEvent?) {<\/p>\n
if let touch = touches.first {<\/p>\n
let location = touch.location(in: self)<\/p>\n
path.move(to: location)<\/p>\n
}<\/p>\n
}<\/p>\n<\/p>\n
override func touchesMoved(_ touches: Set, with event: UIEvent?) {<\/p>\n
if let touch = touches.first {<\/p>\n
let location = touch.location(in: self)<\/p>\n
path.addLine(to: location)<\/p>\n
self.setNeedsDisplay()<\/p>\n
}<\/p>\n
}<\/p>\n<\/p>\n
override func draw(_ rect: CGRect) {<\/p>\n
UIColor.black.setStroke()<\/p>\n
path.stroke()<\/p>\n
}<\/p>\n
}<\/p>\n
“`<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a\u201cpath\u201d\u7684UIBezierPath\u5bf9\u8c61\uff0c\u5e76\u5728\u201ctouchesBegan\u201d\u65b9\u6cd5\u4e2d\u5c06\u5176\u79fb\u52a8\u5230\u89e6\u6478\u4f4d\u7f6e\u3002\u5728\u201ctouchesMoved\u201d\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u5c06\u7ebf\u6bb5\u6dfb\u52a0\u5230\u8def\u5f84\u4e2d\uff0c\u5e76\u8c03\u7528\u201csetNeeds\u82f9\u679c\u8bc1\u4e66\u5b89\u88c5\u4e0d\u4e86<\/a>Display\u201d\u65b9\u6cd5\u6765\u8bf7\u6c42\u89c6\u56fe\u91cd\u65b0\u7ed8\u5236\u3002\u5728\u201cdraw\u201d\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u9ed1\u8272\u7b14\u5237\u7ed8\u5236\u8def\u5f84\u3002<\/p>\n \u73b0\u5728\uff0c\u6211\u4eec\u5df2\u7ecf\u521b\u5efa\u4e86\u4e00\u4e2a\u53ef\u4ee5\u6355\u83b7\u7528\u6237\u8f93\u5165\u7684\u89c6\u56fe\uff0c\u8ba9\u6211\u4eec\u5c06\u5176\u6dfb\u52a0\u5230\u89c6\u56fe\u63a7\u5236\u5668\u4e2d\u3002\u5728\u6211\u4eec\u7684\u89c6\u56fe\u63a7\u5236\u5668\u4e2d\uff0c\u6211\u4eec\u5c06\u6dfb\u52a0\u4e00\u4e2aSignatureView\u5bf9\u8c61\uff0c\u5e76\u5728\u5176\u4e0b\u65b9\u6dfb\u52a0\u4e00\u4e2a\u201cClear\u201d\u6309\u94ae\uff0c\u4ee5\u4fbf\u7528\u6237\u53ef\u4ee5\u6e05\u9664\u7b7e\u540d\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u4ee3\u7801\uff1a<\/p>\n “`swift<\/p>\n import UIKit<\/p>\n class ViewController: UIViewController {<\/p>\n<\/p>\n var signatureView: SignatureView!<\/p>\n<\/p>\n override func viewDidLoad() {<\/p>\n super.viewDidLoad()<\/p>\n<\/p>\n signatureView = SignatureView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height – 50))<\/p>\n self.view.addSubview(signatureView)<\/p>\n<\/p>\n let clearButton = UIButton(frame: CGRect(x: 0, y: self.view.frame.height – 50, width: self.view.frame.width, height: 50))<\/p>\n clearButton.setTitle(“Clear”, for: .normal)<\/p>\n clearButton.setTitleColor(UIColor.black, for: .normal)<\/p>\n clearButton.addTarget(self, action: #selector(clearSignature), for: .touchUpInside)<\/p>\n self.view.addSubview(clearButton)<\/p>\n }<\/p>\n<\/p>\n @objc func clearSignature() {<\/p>\n