登录注册时用的验证码效果图
ViewDidload调用即可
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_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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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/fa2c3fb3dcfb?utm_source=tuicool&utm_medium=referral