iOS 生成图片验证码绘制实例代码
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2023-12-22 20:09:16
登录注册时用的验证码效果图
viewdidload调用即可
_poocodeview = [[poocodeview alloc] initwithf...
登录注册时用的验证码效果图
viewdidload调用即可
_poocodeview = [[poocodeview alloc] initwithframe:cgrectmake(50, 100, 82, 32)]; uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(tapclick:)]; [_poocodeview addgesturerecognizer:tap]; [self.view addsubview:_poocodeview]; #import <uikit/uikit.h> @interface poocodeview : uiview @property (nonatomic, retain) nsarray *changearray; @property (nonatomic, retain) nsmutablestring *changestring; @property (nonatomic, retain) uilabel *codelabel; -(void)changecode; @end #import "poocodeview.h" @implementation poocodeview @synthesize changearray = _changearray; @synthesize changestring = _changestring; @synthesize codelabel = _codelabel; - (id)initwithframe:(cgrect)frame { self = [super initwithframe:frame]; if (self) { // initialization code // self.layer.cornerradius = 5.0; // self.layer.maskstobounds = yes; float red = arc4random() % 100 / 100.0; float green = arc4random() % 100 / 100.0; float blue = arc4random() % 100 / 100.0; uicolor *color = [uicolor colorwithred:red green:green blue:blue alpha:0.2]; self.backgroundcolor = color; [self change]; } return self; } //-(void)touchesbegan:(nsset *)touches withevent:(uievent *)event //{ // [self change]; // [self setneedsdisplay]; //} -(void)changecode{ [self change]; [self setneedsdisplay]; } - (void)change { self.changearray = [[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]; nsmutablestring *getstr = [[nsmutablestring alloc] initwithcapacity:5]; self.changestring = [[nsmutablestring alloc] initwithcapacity:6]; for(nsinteger i = 0; i < 4; i++) { nsinteger index = arc4random() % ([self.changearray count] - 1); getstr = [self.changearray objectatindex:index]; self.changestring = (nsmutablestring *)[self.changestring stringbyappendingstring:getstr]; } } - (void)drawrect:(cgrect)rect { [super drawrect:rect]; float red = arc4random() % 100 / 100.0; float green = arc4random() % 100 / 100.0; float blue = arc4random() % 100 / 100.0; uicolor *color = [uicolor colorwithred:red green:green blue:blue alpha:0.5]; [self setbackgroundcolor:color]; nsstring *text = [nsstring stringwithformat:@"%@",self.changestring]; cgsize csize = [@"s" sizewithfont:[uifont systemfontofsize:20]]; int width = rect.size.width / text.length - csize.width; int height = rect.size.height - csize.height; cgpoint point; 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 withfont:[uifont systemfontofsize:20]]; } cgcontextref context = uigraphicsgetcurrentcontext(); cgcontextsetlinewidth(context, 1.0); for(int cout = 0; cout < 10; cout++) { red = arc4random() % 100 / 100.0; green = arc4random() % 100 / 100.0; blue = arc4random() % 100 / 100.0; color = [uicolor colorwithred:red green:green blue:blue alpha:0.2]; cgcontextsetstrokecolorwithcolor(context, [color cgcolor]); px = arc4random() % (int)rect.size.width; py = arc4random() % (int)rect.size.height; cgcontextmovetopoint(context, px, py); px = arc4random() % (int)rect.size.width; py = arc4random() % (int)rect.size.height; cgcontextaddlinetopoint(context, px, py); cgcontextstrokepath(context); } } @end
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