正文

iOS动态验证码实现代码

︶ㄣSDDLL学院 メ
SDDLL学院V管理员 / 阅读
0919
本文通过实例代码给大家介绍了ios动态验证码的实现方法，代码简单易懂，非常不错，具有参考借鉴价值，需要的朋友参考下吧

本文通过实例代码给大家介绍了ios动态验证码的实现方法，代码简单易懂，非常不错，具有参考借鉴价值，需要的朋友参考下吧

具体代码如下所示:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
//
// AuthcodeView.h
// BSbracelet
//
// Created by Christopher on 17/5/16.
// Copyright © 2017年 ZTracy. All rights reserved.
//
#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
// BSbracelet
//
// Created by Christopher on 17/5/16.
// Copyright © 2017年 ZTracy. All rights reserved.
//
#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 4
#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
使用
-(void)recordBtnClick:(UIButton *)recordBtn
{
  DomodelView = [[UIView alloc]initWithFrame:CGRectMake(0,0,kScreenWidth,kScreenHeight)];
  DomodelView.backgroundColor = [UIColor colorWithRed:0.3 green:0.3 blue:0.3 alpha:0.6];
  authBgview = [[UIView alloc]initWithFrame:CGRectMake(30, 120, self.view.frame.size.width-60, 220)];
  authBgview.backgroundColor = [UIColor whiteColor]; //显示验证码界面
  authBgview.layer.cornerRadius = 8;
  authBgview.layer.masksToBounds = YES;
  authCodeView = [[AuthcodeView alloc] initWithFrame:CGRectMake(10, 10, kScreenWidth-80, 45)];
  [authBgview addSubview:authCodeView];
    //提示文字
  UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 65, kScreenWidth-80, 40)];
  label.text = @"点击图片换验证码";
  label.font = [UIFont systemFontOfSize:15];
  label.textColor = [UIColor grayColor];
  [authBgview addSubview:label];
  //添加输入框
  _input = [[UITextField alloc] initWithFrame:CGRectMake(10, 120, kScreenWidth-80, 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;
  [authBgview addSubview:_input];
  UIButton *closeBtn = [[UIButton alloc] initWithFrame:CGRectMake(10,170, kScreenWidth-80, 40)];
  [closeBtn addTarget:self action:@selector(removeview) forControlEvents:UIControlEventTouchUpInside];
  closeBtn.backgroundColor = RGBCOLOR(34,151,216);
  [closeBtn setTitle: @"关闭" forState: UIControlStateNormal];
  [authBgview addSubview:closeBtn];
  [DomodelView addSubview:authBgview];
   [self.view addSubview:DomodelView];
//  InvoiceRecordViewController *InvoiceRecordVc = [[InvoiceRecordViewController alloc] initWithNibName:@"InvoiceRecordViewController" bundle:nil];
//  [self.navigationController pushViewController:InvoiceRecordVc animated:YES];
}
#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 compare:authCodeView.authCodeStr options:NSCaseInsensitiveSearch |NSNumericSearch] ==NSOrderedSame)
  {
    //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];
    [DomodelView removeFromSuperview];
    InvoiceRecordViewController *InvoiceRecordVc = [[InvoiceRecordViewController alloc] initWithNibName:@"InvoiceRecordViewController" bundle:nil];
    [self.navigationController pushViewController:InvoiceRecordVc animated:YES];
  }
  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;
}

总结

以上所述是小编给大家介绍的iOS动态验证码实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对米米素材网网站的支持！

原文链接：https://blog.csdn.net/mscinsidious/article/details/79994764