前言:
公司項(xiàng)目需求獲取短信驗(yàn)證碼前需要輸入圖形驗(yàn)證碼防止羊毛客使用腳本批量注冊(cè)平臺(tái)賬號(hào)
想了想還是自己重新實(shí)現(xiàn)了一下.
思路
1.容器創(chuàng)建
1.1 代碼創(chuàng)建
1.2 nib文件使用
2.創(chuàng)建驗(yàn)證碼字符串
2.繪圖
2.1 繪字
2.2 繪干擾線
4.點(diǎn)擊刷新機(jī)制
代碼實(shí)例
//
// ImageCodeView.h
// VerCodeView
//
// Created by hpjr on 2016/12/22.
// Copyright ? 2016年 sands. All rights reserved.
//
#import "ImageCodeView.h"
#define CODE_LENGTH 4
#define ARCNUMBER arc4random() % 100 / 100.0
#define ARC_COLOR [UIColor colorWithRed:ARCNUMBER green:ARCNUMBER blue:ARCNUMBER alpha:0.2]
@implementation ImageCodeView
//初始化
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self setupUI];
}
return self;
}
//兼容nib使用
- (void)awakeFromNib{
[super awakeFromNib];
[self setupUI];
}
//設(shè)置默認(rèn)參數(shù)
- (void)setupUI{
self.CodeArr = @[@"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"];
UITapGestureRecognizer* changeCode = [[UITapGestureRecognizer alloc]initWithTarget:self
action:@selector(changeCode)];
[self addGestureRecognizer:changeCode];
self.backgroundColor = ARC_COLOR;
[self getStrCode];
}
//隨機(jī)生成驗(yàn)證碼字符串
- (void)getStrCode{
self.backgroundColor = ARC_COLOR;
NSMutableString* tmpStr = [[NSMutableString alloc] initWithCapacity:5];;
for (int i = 0; i < CODE_LENGTH; i++) {
NSInteger index = arc4random() % (self.CodeArr.count-1);
[tmpStr appendString:[self.CodeArr objectAtIndex:index]];
}
self.CodeStr = [NSString stringWithFormat:@"%@",tmpStr];
}
//刷新驗(yàn)證碼
- (void)changeCode{
[self getStrCode];
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect {
[super drawRect:rect];
CGSize cSize = [@"A" sizeWithAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:20]}];//計(jì)算單個(gè)字所需空間
int width = rect.size.width / self.CodeStr.length - cSize.width;//間距
int height = rect.size.height - cSize.height;//可浮動(dòng)高度
CGPoint point;
//繪碼
float pX, pY;
for (int i = 0; i < self.CodeStr.length; i++)
{
pX = arc4random() % width + rect.size.width / self.CodeStr.length * i;
pY = arc4random() % height;
point = CGPointMake(pX, pY);
unichar c = [self.CodeStr characterAtIndex:i];
NSString *textC = [NSString stringWithFormat:@"%C", c];
[textC drawAtPoint:point withAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:20]}];
}
//干擾線
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context, 1.0);
for(int cout = 0; cout < 10; cout++)
{
CGContextSetStrokeColorWithColor(context, [ARC_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
最終效果
項(xiàng)目代碼地址
