一个可以快速集成的登录页面，通过获取验证码登录，以及登录页面的一个服务条款和隐私条款的跳转！纯代码布局页面，用到了sd_autolayout，以及自己写的几个封装的类。
具体的实现方式直接看demo吧！

Simulator Screen Shot 2016年10月31日 下午3.46.40.png

几个核心的代码块说明一下
一个是验证码倒计时这里

-(void)startTime{
    self.isTimeing = YES;
    __block int timeout = 60; //倒计时时间 60s
    queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue);
    dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行
    dispatch_source_set_event_handler(_timer, ^{
        if(timeout<=0){ //倒计时结束，关闭
            dispatch_source_cancel(_timer);
            dispatch_async(dispatch_get_main_queue(), ^{
                //设置界面的按钮显示 根据自己需求设置
                self.isTimeing = NO;
                [VerCode setTitle:@"验证" forState:UIControlStateNormal];
                if (phoneNum.text.length > 0) {
                    [VerCode setBackgroundColor:key_BgColorF6E];
                    VerCode.enabled = YES;
                }
            });
        }else{
            int seconds = timeout % 61;
            NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
            dispatch_async(dispatch_get_main_queue(), ^{
                //设置界面的按钮显示 根据自己需求设置
                //NSLog(@"____%@",strTime);
                [UIView beginAnimations:nil context:nil];
                [UIView setAnimationDuration:1];
                [VerCode setTitle:[NSString stringWithFormat:@"%@s",strTime] forState:UIControlStateNormal];
                [UIView commitAnimations];
                VerCode.enabled = NO;
                [VerCode setBackgroundColor:key_BgColorB2];
                if (timeout == 50) {
                    canNotGetYZMLab.userInteractionEnabled = YES;
                    canNotGetYZMLab.textColor = key_BgColorF6E;
                }
                if (phoneNum.text.length == 0) {
                    timeout = 0;
                    passwordNum.text = @"";
                }
            });
            timeout--;
        }
    });
    dispatch_resume(_timer);
}

一个是服务条款和隐私条款的格式

    float tw =[self widthForString:str fontSize:14 andHeight:20];
    tw =([UIScreen mainScreen].bounds.size.width-tw)/2;
    
    NSDictionary* style3 = @{@"body":[UIFont fontWithName:@"HelveticaNeue" size:12.0],
                             @"help":[WPAttributedStyleAction styledActionWithAction:^{
                                 NSLog(@"Help action");
                                 
                                 RemarkViewController *remark = [[RemarkViewController alloc]init];
                                 remark.type =0;
                                 [self.navigationController pushViewController:remark animated:YES];
                             }],
                             @"settings":[WPAttributedStyleAction styledActionWithAction:^{
                                 NSLog(@"Settings action");
                                 
                                 RemarkViewController *remark = [[RemarkViewController alloc]init];
                                 remark.type = 1;
                                 [self.navigationController pushViewController:remark animated:YES];
                             }],
                             @"link": key_BgColorF6E};
    
    baoXian.textAlignment = NSTextAlignmentCenter;
    baoXian.textColor = key_BgColor4D;
    baoXian.attributedText = [@"点击开始使用,即表示您同意<help>服务条款</help>及<settings>隐私条款</settings>" attributedStringWithStyleBook:style3];

demo地址:https://github.com/shaoxionghua/CreatLogion