前不久有朋友需要一個啟動廣告的功能，我說網上有挺多的，他說，看的不是很理想。想讓我寫一個，於是乎，抽空寫了一個，程式碼通俗易懂，簡單的封裝了一下，各種事件用block回撥的，有倆種樣式的廣告，一種是全屏廣告，另一種是下面露logo的，類似網頁新聞的啟動廣告。依賴SDWebImage主要用來下載網路的廣告圖片，一般專案裡面網路圖片都用的這個框架，所以在此不做過多的闡述。下面讓我們來看看我封裝的過程，對於新手來說，可以學習一下這種封裝的思想。
1.首先建一個繼承View的LBLaunchImageAdView
.H檔案 程式碼如下：
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// // LBLaunchImageAdView.h // LBLaunchImageAd // 技術交流群：534926022（免費） 511040024(0.8/人付費) // Created by gold on 16/6/8. // Copyright © 2016年 Bison. All rights reserved. // iOS開發學習app下載https://itunes.apple.com/cn/app/it-blog-for-ios-developers/id1067787090?mt=8 typedef enum { FullScreenAdType = 1,//全屏的廣告 LogoAdType = 0,//帶logo的廣告 }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; //倒數計時總時長,預設6秒 @property (strong, nonatomic) UIButton *skipBtn; @property (nonatomic, copy)LBClick clickBlock; - (instancetype)initWithWindow:(UIWindow *)window andType:(NSInteger)type andImgUrl:(NSString *)url; @end |
裡面主要重寫了init方法，init方法方便我們在呼叫封裝的類初始化時傳遞一些引數，在此，我只傳遞了三個必要的引數，其他引數都用@property屬性來調配，達到自己想要的效果，再有就是一個block的回撥函式，主要處理各種事件。下面我們看看.m檔案裡面實現的部分
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// // LBLaunchImageAdView.m // LBLaunchImageAd // 技術交流群：534926022（免費） 511040024(0.8/人付費) // Created by gold on 16/6/8. // Copyright © 2016年 Bison. All rights reserved. // iOS開發學習app下載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; //倒數計時總時長 @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]; //獲取啟動圖片 CGSize viewSize = window.bounds.size; //橫屏請設定成 @"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:)]; // 允許使用者互動 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 - 點選廣告 - (void)activiTap:(UITapGestureRecognizer*)recognizer{ _isClick = @"1"; [self startcloseAnimation]; } #pragma mark - 開啟關閉動畫 - (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 - 關閉動畫完成時處理事件 -(void)closeAddImgAnimation { [countDownTimer invalidate]; countDownTimer = nil; self.hidden = YES; self.aDImgView.hidden = YES; self.hidden = YES; if ([_isClick integerValue] == 1) { if (self.clickBlock) {//點選廣告 self.clickBlock(1100); } }else if([_isClick integerValue] == 2){ if (self.clickBlock) {//點選跳過 self.clickBlock(1101); } }else{ if (self.clickBlock) {//點選跳過 self.clickBlock(1102); } } } - (void)onTimer { if (_adTime == 0) { _adTime = 6; } if (_secondsCountDown < _adTime) { _secondsCountDown++; [self.skipBtn setTitle:[NSString stringWithFormat:@"%ld | 跳過",_secondsCountDown] forState:UIControlStateNormal]; }else{ [countDownTimer invalidate]; countDownTimer = nil; [self startcloseAnimation]; } } #pragma mark - 指定寬度按比例縮放 - (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 |
UI部分由於沒有什麼需要重用的地方，所以沒有再另外抽取出來方法，全部放在init方法裡面，顯得有點臃腫。UI部分在此不做過多的闡述，裡邊主要運用了一個漸變的動畫，利用CABasicAnimation中的opacity,有興趣的朋友可以看看原始碼， 再有就是一個圖片重構的方法，防止圖片變形。
下面我們說下怎麼整合我封裝的這個功能吧，挺簡單的，首先來看看程式碼：
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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { /* FullScreenAdType 全屏廣告 * LogoAdType 帶logo的廣告類似網易廣告，值得注意的是啟動圖片必須帶logo圖 * ImgUrl 圖片url */ LBLaunchImageAdView * adView = [[LBLaunchImageAdView alloc]initWithWindow:self.window andType:LogoAdType andImgUrl:@"http://www.uisheji.com/wp-content/uploads/2013/04/19/app-design-uisheji-ui-icon20121_55.jpg"]; //各種回撥 adView.clickBlock = ^(NSInteger tag){ switch (tag) { case 1100:{ NSLog(@"點選廣告回撥"); TestViewController *vc = [[TestViewController alloc]init]; vc.view.backgroundColor = [UIColor whiteColor]; [self.window.rootViewController presentViewController:vc animated:YES completion:^{ }]; } break; case 1101: NSLog(@"點選跳過回撥"); break; case 1102: NSLog(@"倒數計時完成後的回撥"); break; default: break; } }; return YES; } |
首先在AppDelegate.m匯入標頭檔案#import “LBLaunchImageAdView.h”，然後在didFinishLaunchingWithOptions方法裡面初始化一下，最後就是一些點選的回撥事件了。到此，講解完畢，最後丟上效果圖和下載地址。
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