封装的圆形验证码输入框，输入框的大小、数量、颜色、距离等都可以自行设定！
只需几行代码即可:
NNValidationCodeView *view = [[NNValidationCodeView alloc] initWithFrame:CGRectMake(80, 100, 300, 45) andLabelCount:4 andLabelDistance:10];
[self.view addSubview:view];
view.changedColor = [UIColor yellowColor];
view.codeBlock = ^(NSString *codeString) {
NSLog(@"验证码:%@", codeString);
};
This repositorie is released under the under MIT License