1.创建一个图形验证码视图1
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11#import <UIKit/UIKit.h>
@interface CodeView : UIView
@property (nonatomic,strong) NSArray *changeArray;
@property (nonatomic,strong) NSMutableString *changeString;
@property (nonatomic,strong) UILabel *codeLabel;
-(void)changeCode;
@end
具体实现：1
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83#import "CodeView.h"
@implementation CodeView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
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)changeCode
{
[self change];
}
- (void)change
{
//实际可以从后台请求数据
NSInteger arcNum = arc4random_uniform(10000);
self.changeString = [[NSMutableString alloc]initWithString:[NSString stringWithFormat:@"%ld",arcNum]];
NSLog(@"%@",self.changeString);
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect
{
[super drawRect:rect];
if (self.changeString.length > 0) {
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" sizeWithAttributes:@{NSFontAttributeName:[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 withAttributes:@{NSFontAttributeName:[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);
}
}
}
2.使用1
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6//验证码view
self.codeView = [[TGCodeView alloc]init];
UITapGestureRecognizer *codeTapGes = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(codeViewTapEvent)];
[self.codeView addGestureRecognizer:codeTapGes];
self.codeView.frame = CGRectMake(70, 100, 70, 30);
[self.view addSubview:self.codeView];
验证码视图的点击事件：1
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3- (void)codeViewTapEvent {
[self.codeView changeCode];
}