ios开发之--新手引导页的添加

以往在写启动页面的时候，有时候会直接在启动页里面写，或者自带的vc里面直接写，但是那样并不是很方便，启动页里面往往会添加很多的东西，所以封装成一个单独的类，可以直接使用，即便是后期的更换，或者是其他的工程项目里面需要，直接拖过去，就可以直接使用非常方便！

具体代码就不上传了，附demo的下载地址：

https://github.com/hgl753951/launchTest.git

早先在cocoachina上上传的一个demo：

http://code.cocoachina.com/view/131777

比较简单，可以直接下载demo来看！

下面写一个带有倒计时的广告页功能：

1，新创建一个集成于UIView的类：

@interface hDisplayView : UIView

2，.m文件

a，准备

@interface hDisplayView ()
{
    NSInteger imgTag;
    NSString *picURl;
    UIImageView *imageView;
    UIImageView *smallImg;
    UIButton *timerBtn;

    int secondsCountDown; //倒计时总时长
    NSTimer *countDownTimer;
}

@property(nonatomic,strong)NSFileManager *fileManager;
@property(nonatomic,strong)NSFileHandle *writeHandle;
@property(nonatomic,assign)long long sumLength;
@property(nonatomic,assign)long long currentLength;
@property(nonatomic,strong)UIImage *savedImage;

b，具体实现

@implementation hDisplayView

-(instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];

    if (self) {
        imageView = [[UIImageView alloc]initWithFrame:CGRectMake(, , MainScreen_width, MainScreen_height)];//大背景图片

        if (IS_IPHONE4 == YES) {
            imageView.image = [UIImage imageNamed:@"start_ios-1"];
        }else
        {
            imageView.image = [UIImage imageNamed:@"start_ios"];
        }

        imageView.userInteractionEnabled = YES;
        [self addSubview:imageView];

        smallImg = [[UIImageView alloc]initWithFrame:CGRectMake(, , MainScreen_width, MainScreen_height-)];
//        smallImg.image = [UIImage imageNamed:@"start-ad"];
        [imageView addSubview:smallImg];

        timerBtn = [[UIButton alloc]initWithFrame:CGRectMake(MainScreen_width -  - , , , )];

        [self initView];
    }
    return self;
}

-(void)initBtn
{

    timerBtn.clipsToBounds = YES;
    timerBtn.layer.cornerRadius = ;
    [timerBtn setTitleColor:RGB(, , ) forState:UIControlStateNormal];
    timerBtn.titleLabel.font = [UIFont systemFontOfSize:];
    [timerBtn addTarget:self action:@selector(jumpBtnClick:) forControlEvents:UIControlEventTouchUpInside];
    [imageView addSubview:timerBtn];
    timerBtn.titleLabel.numberOfLines = ;
    timerBtn.titleLabel.textAlignment = NSTextAlignmentCenter;
    timerBtn.backgroundColor = RGBA(, , , 0.5);

    //开始倒计时
    countDownTimer = [NSTimer scheduledTimerWithTimeInterval: target:self selector:@selector(timeFireMethod) userInfo:nil repeats:YES]; //启动倒计时后会每秒钟调用一次方法 timeFireMethod
    [[NSRunLoop mainRunLoop] addTimer:countDownTimer forMode:NSDefaultRunLoopMode];

    //[NSThread detachNewThreadSelector:@selector(starTimer) toTarget:self withObject:nil];

    //设置倒计时显示的时间
    //设置倒计时总时长
    secondsCountDown = ;//60秒倒计时
    [timerBtn setTitle:[NSString stringWithFormat:@"跳过\n%ds",secondsCountDown] forState:UIControlStateNormal];

//     NSTimeInterval period = 1.0; //设置时间间隔
//     dispatch_queue_t 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), period * NSEC_PER_SEC, 0); //每秒执行
//     dispatch_source_set_event_handler(_timer, ^{
//              //在这里执行事件
//         if (secondsCountDown<=0) {
//             dispatch_source_cancel(_timer);
//             dispatch_async(dispatch_get_main_queue(), ^{
//                 self.hidden = YES;
//             });
//
//         }else{
//             dispatch_async(dispatch_get_main_queue(), ^{
//
//                 if (secondsCountDown==0) {
//                     self.hidden = YES;
//                 }else{
//                    [timerBtn setTitle:[NSString stringWithFormat:@"跳过\n%ds",secondsCountDown] forState:UIControlStateNormal];
//                 }
//             });
//             secondsCountDown--;
//         }
//         NSLog(@"循环执行");
//         //[self timeFireMethod];
//         });
//     dispatch_resume(_timer);

}

-(void)initView
{
    //先进行判断，1：如果是第一次启动不显示此启动图片，2：如果不是第一次启动，那么加载此启动图片，如果图片不存在就下载，如果图片存在就读取缓存
    hUser *huser = [[hUser alloc]init];
    [hHttpEngine getStartupPicRequest:huser success:^(id response) {
        NSLog(@"respons  ----%@",response);
        NSDictionary *dict = (NSDictionary *)response;
        NSString *stautes = [NSString stringWithFormat:@"%@",[dict objectForKey:@"status"]];
        if ([stautes isEqualToString:@""]) {
            picURl = [NSString stringWithFormat:@"%@",[dict objectForKey:@"pic"]];
            NSLog(@"picurl is %@",picURl);
            [smallImg sd_setImageWithURL:[NSURL URLWithString:picURl] placeholderImage:[UIImage imageNamed:@""]];
            smallImg.userInteractionEnabled = YES;
            [self initBtn];
        }
    }failure:^(NSError *err) {
        self.hidden = YES;
    }];

}

-(void)jumpBtnClick:(id)sender
{
    self.hidden = YES;
}

-(void)timeFireMethod{

    //倒计时-1
    secondsCountDown--;
    //修改倒计时标签现实内容
    [timerBtn setTitle:[NSString stringWithFormat:@"跳过\n%ds",secondsCountDown] forState:UIControlStateNormal];

    //当倒计时到0时，做需要的操作，比如验证码过期不能提交
    if(secondsCountDown==){
        [countDownTimer invalidate];
        self.hidden = YES;
    }
}

@end

具体效果就不上传了，可以直接复制上面的代码，自行运行查看效果；

c，在AppDelegate里面添加，就是给当前window添加一个根视图：

    hDisplayView *hVC = [[hDisplayView alloc] initWithFrame:CGRectMake(, , MainScreen_width,  MainScreen_height)];
    hVC.hidden = NO;
    [self.window.rootViewController.view addSubview:hVC];
    [self.window bringSubviewToFront:hVC];

搞定，这两个效果可以结合用，判断第一次运行app，引导页出现，反之则出现广告业！