分分钟解决iOS开发中App启动广告的功能

Posted 2020-08-03 小敏的博客

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前不久有朋友需要一个启动广告的功能，我说网上有挺多的，他说，看的不是很理想。想让我写一个，于是乎，抽空写了一个，代码通俗易懂，简单的封装了一下，各种事件用block回调的，有俩种样式的广告，一种是全屏广告，另一种是下面露logo的，类似网页新闻的启动广告。依赖SDWebImage主要用来下载网络的广告图片，一般项目里面网络图片都用的这个框架，所以在此不做过多的阐述。下面让我们来看看我封装的过程，对于新手来说，可以学习一下这种封装的思想。

1.首先建一个继承View的LBLaunchImageAdView

.H文件代码如下：

//

//  LBLaunchImageAdView.h

//  LBLaunchImageAd

//  技术交流群：534926022（免费） 511040024(0.8/人付费)

//  Created by gold on 16/6/8.

//  Copyright © 2016年 Bison. All rights reserved.

//  ios开发学习app下载https://itunes.apple.com/cn/app/it-blog-for-ios-developers/id1067787090?mt=8

typedef enum {



    FullScreenAdType = 1,//全屏的广告

    LogoAdType = 0,//带logo的广告



}AdType;

#import <UIKit/UIKit.h>

#import "UIImageView+WebCache.h"

#define mainHeight      [[UIScreen mainScreen] bounds].size.height

#define mainWidth       [[UIScreen mainScreen] bounds].size.width

typedef void (^LBClick) (NSInteger tag);

@interface LBLaunchImageAdView : UIView

@property (strong, nonatomic) UIImageView *aDImgView;

@property (strong, nonatomic) UIWindow *window;

@property (assign, nonatomic) NSInteger adTime; //倒计时总时长,默认6秒

@property (strong, nonatomic) UIButton *skipBtn;

@property (nonatomic, copy)LBClick clickBlock;

- (instancetype)initWithWindow:(UIWindow *)window andType:(NSInteger)type andImgUrl:(NSString *)url;

@end

里面主要重写了init方法，init方法方便我们在调用封装的类初始化时传递一些参数，在此，我只传递了三个必要的参数，其他参数都用@property属性来调配，达到自己想要的效果，再有就是一个block的回调函数，主要处理各种事件。下面我们看看.m文件里面实现的部分

//

//  LBLaunchImageAdView.m

//  LBLaunchImageAd

//  技术交流群：534926022（免费） 511040024(0.8/人付费)

//  Created by gold on 16/6/8.

//  Copyright © 2016年 Bison. All rights reserved.

//  iOS开发学习app下载https://itunes.apple.com/cn/app/it-blog-for-ios-developers/id1067787090?mt=8

#import "LBLaunchImageAdView.h"

@interface LBLaunchImageAdView()

{

    NSTimer *countDownTimer;

}

@property (strong, nonatomic) NSString *isClick;

@property (assign, nonatomic) NSInteger secondsCountDown; //倒计时总时长

@end

@implementation LBLaunchImageAdView

- (instancetype)initWithWindow:(UIWindow *)window andType:(NSInteger)type andImgUrl:(NSString *)url

{

    self = [super init];

    if (self) {

        self.window = window;

        _secondsCountDown = 0;

        [window makeKeyAndVisible];

        //获取启动图片

        CGSize viewSize = window.bounds.size;

        //横屏请设置成 @"Landscape"

        NSString *viewOrientation = @"Portrait";



        NSString *launchImageName = nil;



        NSArray* imagesDict = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"UILaunchImages"];

        for (NSDictionary* dict in imagesDict)



        {

            CGSize imageSize = CGSizeFromString(dict[@"UILaunchImageSize"]);

            if (CGSizeEqualToSize(imageSize, viewSize) && [viewOrientation isEqualToString:dict[@"UILaunchImageOrientation"]])



            {

                launchImageName = dict[@"UILaunchImageName"];

            }



        }

        UIImage * launchImage = [UIImage imageNamed:launchImageName];

        self.backgroundColor = [UIColor colorWithPatternImage:launchImage];

        self.frame = CGRectMake(0, 0, mainWidth, mainHeight);

        if (type == FullScreenAdType) {

            self.aDImgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, mainWidth, mainHeight)];



        }else{

            self.aDImgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, mainWidth, mainHeight - mainWidth/3)];

        }



        self.skipBtn = [UIButton buttonWithType:UIButtonTypeCustom];

        self.skipBtn.frame = CGRectMake(mainWidth - 70, 20, 60, 30);

        self.skipBtn.backgroundColor = [UIColor brownColor];

        self.skipBtn.titleLabel.font = [UIFont systemFontOfSize:14];

        [self.skipBtn addTarget:self action:@selector(skipBtnClick) forControlEvents:UIControlEventTouchUpInside];

        [self.aDImgView addSubview:self.skipBtn];

        UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.skipBtn.bounds byRoundingCorners:UIRectCornerBottomRight | UIRectCornerTopRight cornerRadii:CGSizeMake(15, 15)];

        CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];

        maskLayer.frame = self.skipBtn.bounds;

        maskLayer.path = maskPath.CGPath;

        self.skipBtn.layer.mask = maskLayer;

        SDWebImageManager *manager = [SDWebImageManager sharedManager];

        [manager downloadImageWithURL:[NSURL URLWithString:url] options:0 progress:^(NSInteger receivedSize, NSInteger expectedSize) {



        } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {

            if (image) {

                 [self.aDImgView setImage:[self imageCompressForWidth:image targetWidth:mainWidth]];

            }

        }];

        self.aDImgView.tag = 1101;

        self.aDImgView.backgroundColor = [UIColor redColor];

        [self addSubview:self.aDImgView];

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(activiTap:)];

        // 允许用户交互

        self.aDImgView.userInteractionEnabled = YES;

        [self.aDImgView addGestureRecognizer:tap];



        CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];

        opacityAnimation.duration = 0.8;

        opacityAnimation.fromValue = [NSNumber numberWithFloat:0.0];

        opacityAnimation.toValue = [NSNumber numberWithFloat:0.8];



        opacityAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];



        [self.aDImgView.layer addAnimation:opacityAnimation forKey:@"animateOpacity"];

        countDownTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

        [self.window addSubview:self];

    }

    return self;

}

#pragma mark - 点击广告

- (void)activiTap:(UITapGestureRecognizer*)recognizer{

    _isClick = @"1";

    [self startcloseAnimation];

}

#pragma mark - 开启关闭动画

- (void)startcloseAnimation{

    CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];

    opacityAnimation.duration = 0.5;

    opacityAnimation.fromValue = [NSNumber numberWithFloat:1.0];

    opacityAnimation.toValue = [NSNumber numberWithFloat:0.3];

    opacityAnimation.removedOnCompletion = NO;

    opacityAnimation.fillMode = kCAFillModeForwards;



    [self.aDImgView.layer addAnimation:opacityAnimation forKey:@"animateOpacity"];

    [NSTimer scheduledTimerWithTimeInterval:opacityAnimation.duration

                                     target:self

                                   selector:@selector(closeAddImgAnimation)

                                   userInfo:nil

                                    repeats:NO];



}

- (void)skipBtnClick{

    _isClick = @"2";

    [self startcloseAnimation];

}

#pragma mark - 关闭动画完成时处理事件

-(void)closeAddImgAnimation

{

    [countDownTimer invalidate];

    countDownTimer = nil;

    self.hidden = YES;

    self.aDImgView.hidden = YES;

    self.hidden = YES;

    if ([_isClick integerValue] == 1) {



        if (self.clickBlock) {//点击广告

            self.clickBlock(1100);

        }

    }else if([_isClick integerValue] == 2){

        if (self.clickBlock) {//点击跳过

            self.clickBlock(1101);

        }

    }else{

        if (self.clickBlock) {//点击跳过

            self.clickBlock(1102);

        }

    }







}

- (void)onTimer {



    if (_adTime == 0) {

        _adTime = 6;

    }

    if (_secondsCountDown < _adTime) {

        _secondsCountDown++;

        [self.skipBtn setTitle:[NSString stringWithFormat:@"%ld | 跳过",_secondsCountDown] forState:UIControlStateNormal];

    }else{



        [countDownTimer invalidate];

        countDownTimer = nil;

        [self startcloseAnimation];



    }

}

#pragma mark - 指定宽度按比例缩放

- (UIImage *)imageCompressForWidth:(UIImage *)sourceImage targetWidth:(CGFloat)defineWidth {

    UIImage *newImage = nil;

    CGSize imageSize = sourceImage.size;

    CGFloat width = imageSize.width;

    CGFloat height = imageSize.height;

    CGFloat targetWidth = defineWidth;

    CGFloat targetHeight = height / (width / targetWidth);

    CGSize size = CGSizeMake(targetWidth, targetHeight);

    CGFloat scaleFactor = 0.0;

    CGFloat scaledWidth = targetWidth;

    CGFloat scaledHeight = targetHeight;

    CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);



    if(CGSizeEqualToSize(imageSize, size) == NO){



        CGFloat widthFactor = targetWidth / width;

        CGFloat heightFactor = targetHeight / height;



        if(widthFactor > heightFactor){

            scaleFactor = widthFactor;

        }

        else{

            scaleFactor = heightFactor;

        }

        scaledWidth = width * scaleFactor;

        scaledHeight = height * scaleFactor;



        if(widthFactor > heightFactor){



            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;



        }else if(widthFactor < heightFactor){



            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;

        }

    }



    //    UIGraphicsBeginImageContext(size);

    UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);

    CGRect thumbnailRect = CGRectZero;

    thumbnailRect.origin = thumbnailPoint;

    thumbnailRect.size.width = scaledWidth;

    thumbnailRect.size.height = scaledHeight;



    [sourceImage drawInRect:thumbnailRect];



    newImage = UIGraphicsGetImageFromCurrentImageContext();



    if(newImage == nil){

        NSLog(@"scale image fail");

    }



    UIGraphicsEndImageContext();

    return newImage;

}

@end