iOS本地动态生成验证码的方法
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2024-02-18 20:34:40
前几天app注册被人攻击了,从网上找了这个先保存下。。。。
用于ios本地动态生成验证码,效果如下:
导入coregraphics.framework...
前几天app注册被人攻击了,从网上找了这个先保存下。。。。
用于ios本地动态生成验证码,效果如下:
- 导入coregraphics.framework
用于绘制图形
- 封装uiview,便捷使用,代码如下:
authcodeview.h #import <uikit/uikit.h> @interface authcodeview : uiview @property (strong, nonatomic) nsarray *dataarray;//字符素材数组 @property (strong, nonatomic) nsmutablestring *authcodestr;//验证码字符串 @end authcodeview.m #import "authcodeview.h" #define krandomcolor [uicolor colorwithred:arc4random() % 256 / 256.0 green:arc4random() % 256 / 256.0 blue:arc4random() % 256 / 256.0 alpha:1.0]; #define klinecount 6 #define klinewidth 1.0 #define kcharcount 6 #define kfontsize [uifont systemfontofsize:arc4random() % 5 + 15] @implementation authcodeview /* // only override drawrect: if you perform custom drawing. // an empty implementation adversely affects performance during animation. - (void)drawrect:(cgrect)rect { // drawing code } */ - (instancetype)initwithframe:(cgrect)frame { self = [super initwithframe:frame]; if (self) { self.layer.cornerradius = 5.0f; self.layer.maskstobounds = yes; self.backgroundcolor = krandomcolor; [self getauthcode];//获得随机验证码 } return self; } #pragma mark 获得随机验证码 - (void)getauthcode { //字符串素材 _dataarray = [[nsarray alloc] initwithobjects:@"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",@"i",@"j",@"k",@"l",@"m",@"n",@"o",@"p",@"q",@"r",@"s",@"t",@"u",@"v",@"w",@"x",@"y",@"z",@"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",@"i",@"j",@"k",@"l",@"m",@"n",@"o",@"p",@"q",@"r",@"s",@"t",@"u",@"v",@"w",@"x",@"y",@"z",nil]; _authcodestr = [[nsmutablestring alloc] initwithcapacity:kcharcount]; //随机从数组中选取需要个数的字符串,拼接为验证码字符串 for (int i = 0; i < kcharcount; i++) { nsinteger index = arc4random() % (_dataarray.count-1); nsstring *tempstr = [_dataarray objectatindex:index]; _authcodestr = (nsmutablestring *)[_authcodestr stringbyappendingstring:tempstr]; } } #pragma mark 点击界面切换验证码 - (void)touchesbegan:(nsset *)touches withevent:(uievent *)event { [self getauthcode]; //setneedsdisplay调用drawrect方法来实现view的绘制 [self setneedsdisplay]; } - (void)drawrect:(cgrect)rect { [super drawrect:rect]; //设置随机背景颜色 self.backgroundcolor = krandomcolor; //根据要显示的验证码字符串,根据长度,计算每个字符串显示的位置 nsstring *text = [nsstring stringwithformat:@"%@",_authcodestr]; cgsize csize = [@"a" sizewithattributes:@{nsfontattributename:[uifont systemfontofsize:20]}]; int width = rect.size.width/text.length - csize.width; int height = rect.size.height - csize.height; cgpoint point; //依次绘制每一个字符,可以设置显示的每个字符的字体大小、颜色、样式等 float px,py; for ( int i = 0; i<text.length; i++) { px = arc4random() % width + rect.size.width/text.length * i; py = arc4random() % height; point = cgpointmake(px, py); unichar c = [text characteratindex:i]; nsstring *textc = [nsstring stringwithformat:@"%c", c]; [textc drawatpoint:point withattributes:@{nsfontattributename:kfontsize}]; } //调用drawrect:之前,系统会向栈中压入一个cgcontextref,调用uigraphicsgetcurrentcontext()会取栈顶的cgcontextref cgcontextref context = uigraphicsgetcurrentcontext(); //设置线条宽度 cgcontextsetlinewidth(context, klinewidth); //绘制干扰线 for (int i = 0; i < klinecount; i++) { uicolor *color = krandomcolor; cgcontextsetstrokecolorwithcolor(context, color.cgcolor);//设置线条填充色 //设置线的起点 px = arc4random() % (int)rect.size.width; py = arc4random() % (int)rect.size.height; cgcontextmovetopoint(context, px, py); //设置线终点 px = arc4random() % (int)rect.size.width; py = arc4random() % (int)rect.size.height; cgcontextaddlinetopoint(context, px, py); //画线 cgcontextstrokepath(context); } } @end
- 界面添加验证码
@interface authcodeviewcontroller ()<uitextfielddelegate, uialertviewdelegate> { authcodeview *authcodeview; uitextfield *_input; } @end @implementation authcodeviewcontroller - (void)viewdidload { [super viewdidload]; // do any additional setup after loading the view. self.view.backgroundcolor = [uicolor whitecolor]; //显示验证码界面 authcodeview = [[authcodeview alloc] initwithframe:cgrectmake(30, 100, self.view.frame.size.width-60, 40)]; [self.view addsubview:authcodeview]; //提示文字 uilabel *label = [[uilabel alloc] initwithframe:cgrectmake(50, 160, self.view.frame.size.width-100, 40)]; label.text = @"点击图片换验证码"; label.font = [uifont systemfontofsize:12]; label.textcolor = [uicolor graycolor]; [self.view addsubview:label]; //添加输入框 _input = [[uitextfield alloc] initwithframe:cgrectmake(30, 220, self.view.frame.size.width-60, 40)]; _input.layer.bordercolor = [uicolor lightgraycolor].cgcolor; _input.layer.borderwidth = 2.0; _input.layer.cornerradius = 5.0; _input.font = [uifont systemfontofsize:21]; _input.placeholder = @"请输入验证码!"; _input.clearbuttonmode = uitextfieldviewmodewhileediting; _input.backgroundcolor = [uicolor clearcolor]; _input.textalignment = nstextalignmentcenter; _input.returnkeytype = uireturnkeydone; _input.delegate = self; [self.view addsubview:_input]; } #pragma mark 输入框代理,点击return 按钮 - (bool)textfieldshouldreturn:(uitextfield *)textfield { //判断输入的是否为验证图片中显示的验证码 if ([_input.text isequaltostring:authcodeview.authcodestr]) { //正确弹出警告款提示正确 uialertview *alview = [[uialertview alloc] initwithtitle:@"恭喜您 ^o^" message:@"验证成功" delegate:self cancelbuttontitle:@"ok" otherbuttontitles:nil, nil]; [alview show]; } else { //验证不匹配,验证码和输入框抖动 cakeyframeanimation *anim = [cakeyframeanimation animationwithkeypath:@"transform.translation.x"]; anim.repeatcount = 1; anim.values = @[@-20,@20,@-20]; // [authcodeview.layer addanimation:anim forkey:nil]; [_input.layer addanimation:anim forkey:nil]; } return yes; } #pragma mark 警告框中方法 -(void)alertview:(uialertview *)alertview clickedbuttonatindex:(nsinteger)buttonindex { //清空输入框内容,收回键盘 if (buttonindex==0) { _input.text = @""; [_input resignfirstresponder]; } }
以上所述是小编给大家介绍的ios本地动态生成验证码的方法,希望对大家有所帮助