昨天在网上看了几篇关于集成启动页广告的博客，（参考自http://www.jianshu.com/p/ffa65292abf2)
发现添加到项目里面并不是那么方便（请原谅我说的方便是只需几行代码就集成一个功能的那种）。所以我参考了他们的代码，自己整合了一个只需两行代码添加广告的demo。（也许有很多不完善的地方，还望各路大神见谅）。
效果图：
66.gif
广告思路：第一次进入app时没有广告（因为广告的加载最好是从本地缓存获取，如果每次都从网络获取有可能因网速原因加载失败）。第一次启动的同时，根据后台返回的数据加载广告（一般是图片地址和广告链接），然后保存在本地。第二次启动的时候本地存在了广告，这个时候就可以显示了。然后请求最新的广告数据，如果和旧广告一样则不做操作；如果有新广告，则删除本地的旧广告，保存新广告，下次启动再显示。
下面上代码: ADView.h (继承自UIView)
#import <UIKit/UIKit.h>
#define ScreenWidth [UIScreen mainScreen].bounds.size.width
#define ScreenHeight [UIScreen mainScreen].bounds.size.height
#define UserDefaults [NSUserDefaults standardUserDefaults]
static NSString *const adImageName = @"adImageName";
static NSString *const adUrl = @"adUrl";
@interface ADView : UIView
/** 倒计时（默认3秒） */
@property (nonatomic,assign) NSUInteger showTime;
/** 初始化方法*/
-(instancetype)initWithFrame:(CGRect)frame andImgUrl:(NSString *)imageUrl andADUrl:(NSString *)adUrl andClickBlock:(void(^)(NSString *clikImgUrl))block;
/** 显示广告页面方法*/
- (void)show;
@end
ADView.m
#import "ADView.h"
@interface ADView()
@property (nonatomic, strong) UIImageView *adView;
@property (nonatomic, strong) UIButton *countBtn;
@property (nonatomic, strong) NSTimer *countTimer;
@property (nonatomic, assign) NSUInteger count;
/** 广告图片本地路径 */
@property (nonatomic,copy) NSString *filePath;
/** 新广告图片地址 */
@property (nonatomic,copy) NSString *imgUrl;
/** 新广告的链接 */
@property (nonatomic,copy) NSString *adUrl;
/** 所点击的广告链接 */
@property (nonatomic,copy) NSString *clickAdUrl;
/** 点击回调block */
@property (nonatomic,copy) void (^clickBlock)(NSString *url);
@end
@implementation ADView
-(NSUInteger)showTime
{
if (_showTime == 0)
{
return 3;
}
else
{
return _showTime;
}
}
- (NSTimer *)countTimer
{
if (!_countTimer) {
_countTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countDown) userInfo:nil repeats:YES];
}
return _countTimer;
}
/**
* 初始化
*
* @param frame 坐标
* @param imageUrl 图片地址
* @param adUrl 广告链接
* @param block 点击广告回调
*
* @return self
*/
-(instancetype)initWithFrame:(CGRect)frame andImgUrl:(NSString *)imageUrl andADUrl:(NSString *)adUrl andClickBlock:(void (^)(NSString *))block
{
self = [super initWithFrame:frame];
if (self) {
//给属性赋值
_clickBlock = block;
_imgUrl = imageUrl;
_adUrl = adUrl;
//广告图片
_adView = [[UIImageView alloc] initWithFrame:frame];
_adView.userInteractionEnabled = YES;
_adView.contentMode = UIViewContentModeScaleAspectFill;
_adView.clipsToBounds = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(pushToAd)];
[_adView addGestureRecognizer:tap];
//跳过按钮
CGFloat btnW = 60;
CGFloat btnH = 30;
_countBtn = [[UIButton alloc] initWithFrame:CGRectMake(ScreenWidth - btnW - 24, btnH, btnW, btnH)];
[_countBtn addTarget:self action:@selector(dismiss) forControlEvents:UIControlEventTouchUpInside];
_countBtn.titleLabel.font = [UIFont systemFontOfSize:15];
[_countBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
_countBtn.backgroundColor = [UIColor colorWithRed:38 /255.0 green:38 /255.0 blue:38 /255.0 alpha:0.6];
_countBtn.layer.cornerRadius = 4;
[self addSubview:_adView];
[self addSubview:_countBtn];
}
return self;
}
- (void)show
{
//判断本地缓存广告是否存在，存在即显示
if ([self imageExist]) {
//设置按钮倒计时
[_countBtn setTitle:[NSString stringWithFormat:@"跳过%zd", self.showTime] forState:UIControlStateNormal];
//当前显示的广告图片
_adView.image = [UIImage imageWithContentsOfFile:_filePath];
//当前显示的广告链接
_clickAdUrl = [UserDefaults valueForKey:adUrl];
// 倒计时方法1：GCD
// [self startCoundown];
// 倒计时方法2：定时器
[self startTimer];
UIWindow *window = [UIApplication sharedApplication].keyWindow;
[window addSubview:self];
}
//不管本地是否存在广告图片都获取最新图片
[self setNewADImgUrl:_imgUrl];
}
//判断沙盒中是否存在广告图片，如果存在，直接显示
- (BOOL)imageExist
{
_filePath = [self getFilePathWithImageName:[UserDefaults valueForKey:adImageName]];
BOOL isExist = [self isFileExistWithFilePath:_filePath];
return isExist;
}
//跳转到广告页面
- (void)pushToAd{
if (_clickAdUrl)
{
//把所点击的广告链接回调出去
_clickBlock(_clickAdUrl);
[self dismiss];
}
}
//跳过
- (void)countDown
{
_count --;
[_countBtn setTitle:[NSString stringWithFormat:@"跳过%zd",_count] forState:UIControlStateNormal];
if (_count == 0) {
[self dismiss];
}
}
// 定时器倒计时
- (void)startTimer
{
_count = self.showTime;
[[NSRunLoop mainRunLoop] addTimer:self.countTimer forMode:NSRunLoopCommonModes];
}
// GCD倒计时
- (void)startCoundown
{
__block NSUInteger timeout = self.showTime + 1; //倒计时时间 + 1
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),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(), ^{
[self dismiss];
});
}else{
dispatch_async(dispatch_get_main_queue(), ^{
[_countBtn setTitle:[NSString stringWithFormat:@"跳过%zd",timeout] forState:UIControlStateNormal];
});
timeout--;
}
});
dispatch_resume(_timer);
}
// 移除广告页面
- (void)dismiss
{
[self.countTimer invalidate];
self.countTimer = nil;
[UIView animateWithDuration:0.3f animations:^{
self.alpha = 0.f;
} completion:^(BOOL finished) {
[self removeFromSuperview];
}];
}
//获取最新广告
- (void)setNewADImgUrl:(NSString *)imgUrl
{
//获取图片名字（***.png）
NSString *imgName = [[imgUrl componentsSeparatedByString:@"/"]lastObject];
//拼接沙盒路径
NSString *filePath = [self getFilePathWithImageName:imgName];
BOOL isExist = [self isFileExistWithFilePath:filePath];
if (!isExist){// 如果本地没有该图片，下载新图片保存，并且删除旧图片
[self downloadAdImageWithUrl:imgUrl imageName:imgName];
}
}
/**
* 下载新图片(这里也可以自己使用SDWebImage来下载图片)
*/
- (void)downloadAdImageWithUrl:(NSString *)imageUrl imageName:(NSString *)imageName
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:imageUrl]];
UIImage *image = [UIImage imageWithData:data];
NSString *filePath = [self getFilePathWithImageName:imageName];
if ([UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES]) {// 保存成功
NSLog(@"保存成功");
//删除旧广告图片
[self deleteOldImage];
//设置新图片
[UserDefaults setValue:imageName forKey:adImageName];
//设置广告链接
[UserDefaults setValue:_adUrl forKey:adUrl];
[UserDefaults synchronize];
}else{
NSLog(@"保存失败");
}
});
}
#pragma mark - 文件操作
/**
* 判断文件是否存在
*/
- (BOOL)isFileExistWithFilePath:(NSString *)filePath
{
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDirectory = FALSE;
return [fileManager fileExistsAtPath:filePath isDirectory:&isDirectory];
}
/**
* 根据图片名拼接文件路径
*/
- (NSString *)getFilePathWithImageName:(NSString *)imageName
{
if (imageName) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:imageName];
return filePath;
}
return nil;
}
/**
* 删除旧图片
*/
- (void)deleteOldImage
{
NSString *imageName = [UserDefaults valueForKey:adImageName];
if (imageName) {
NSString *filePath = [self getFilePathWithImageName:imageName];
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeItemAtPath:filePath error:nil];
}
}
@end
使用方法：在任何地方(当然是获取到广告数据的地方了)导入ADView.h，添加以下两行代码即可。
//1、创建广告
ADView *adView = [[ADView alloc] initWithFrame:[UIApplication sharedApplication].keyWindow.bounds andImgUrl:imageUrl andADUrl:adURL andClickBlock:^(NSString *clikImgUrl) {
NSLog(@"进入广告:%@",clikImgUrl);
}];
//2、显示广告
[adView show];
GitHub地址：https://github.com/xiongoahc/LaunchAD
第一次提交自己的代码，还有很多待完善的地方，各位小伙伴如果用着觉得还可以，还请赏赐一个星星，谢谢！
