Round 2----->缓存功能实现
在interface中添加下载按钮
@property (nonatomic,strong) UIButton* downLoadBtn; //下载按钮
按照之前的步骤，在initMJPlayerFrame中对添加的控件进行布局，并添加手势来对控制界面进行显示隐藏操作
/*界面 ROUND 2********************************************************************************************/
self.downLoadBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[self.downLoadBtn setImage:[UIImage imageNamed:@"MJPlayer_download"] forState:UIControlStateNormal];
[self.downLoadBtn setImage:[UIImage imageNamed:@"MJPlayer_not_download"] forState:UIControlStateSelected];
[self.downLoadBtn addTarget:self action:@selector(downLoadBtnPress:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:self.downLoadBtn];
[self.downLoadBtn mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.equalTo(self);
make.right.equalTo(self).offset(-20);
make.height.equalTo(@(49));
make.width.equalTo(@(40));
}];
//添加手势
singleTapGestureRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(singleTap:)];
[singleTapGestureRecognizer setNumberOfTapsRequired:1];
[self addGestureRecognizer:singleTapGestureRecognizer];
//延迟隐藏控制界面
[self showAndHideControl:0];
//显示隐藏控制界面
-(void)showAndHideControl:(NSInteger)alphaNum
{
__weak typeof (self)self_ = self;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[UIView animateWithDuration:0.2f animations:^{
self_.bottomControlView.alpha = alphaNum;
self_.downLoadBtn.alpha = alphaNum;
}];
});
}
-(void)singleTap:(UITapGestureRecognizer*)tapGesture
{
__weak typeof (self)self_ = self;
[UIView animateWithDuration:0.2f animations:^{
self_.bottomControlView.alpha = 1;
self_.downLoadBtn.alpha = 1;
} completion:^(BOOL finished) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[UIView animateWithDuration:0.2f animations:^{
self_.bottomControlView.alpha = 0;
self_.downLoadBtn.alpha = 0;
}];
});
}];
}
在项目中新建一个下载类 MJDownLoad继承于NSObject，使用单例创建对象，声明下载方法及本地方法，待会在.m文件中实现
MJDownLoad.h//// MJDownLoad.h// MJAVPlayer//// Created by 马家俊 on 16/11/4.// Copyright © 2016年 MJJ. All rights reserved.//#import#import#define UserDefaults [NSUserDefaults standardUserDefaults]
#define GetFileName [[strUrl stringByReplacingOccurrencesOfString:@"/" withString:@""] stringByReplacingOccurrencesOfString:@"." withString:@""]
@interface MJDownLoad : NSObject
/*!单例模式获取MJDownLoad对象
*\\returns returns: 返回ParkApply对象
*/
+ (MJDownLoad *)shareInstanceManager;
/*!获取url进行下载
*/
-(void)downLoadWithUrl:(NSString*)strUrl;
/*!获取本地url
*\\returns returns: 返回NSString 本地URL或者空字符串
*/
-(NSString*)getLocalVedio:(NSString*)strUrl;
@end
MJDownload单例
static MJDownLoad *g_MJDownLoad;
+ (MJDownLoad *)shareInstanceManager
{
@synchronized(self)
{
if (!g_MJDownLoad)
{
g_MJDownLoad = [[MJDownLoad alloc] init];
}
}
return g_MJDownLoad;
}
downLoad方法，使用的是 downloadTaskWithRequest，获取URL后先去cache中查看是否有
VedioCache这个文件夹，如果没有则直接代码创建该文件夹，之后进行下载
-(void)downLoadWithUrl:(NSString*)strUrl
{
//获取cache路径，该文件夹中的文件不会被同步，清楚缓存直接删除该文件夹下所有子文件即可
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) ;
NSString *documentsDire = [paths objectAtIndex:0];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
//以获取到的视频文件名称作为存储文件名
NSString *fileName = GetFileName;
NSString *fileNameWithMP4 = [fileName stringByAppendingString:@".mp4"];
NSFileManager *fileManager = [[NSFileManager alloc] init];
//查看是否有该路径，如果没有则创建
NSString* createPath = [NSString stringWithFormat:@"%@/VedioCache/%@", documentsDire,fileName];
if (![[NSFileManager defaultManager] fileExistsAtPath:createPath])
{
[fileManager createDirectoryAtPath:createPath withIntermediateDirectories:YES attributes:nil error:nil];
}else
{
NSLog(@"FileDir is exists.");
}
//视频缓存最终路径
NSString *fullPath = [NSString stringWithFormat:@"%@/%@",createPath,fileNameWithMP4];
NSURL *url = [NSURL URLWithString:strUrl];
NSURLRequest *requst = [NSURLRequest requestWithURL:url];
//开启下载任务
NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:requst progress:nil destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
return [NSURL fileURLWithPath:fullPath];
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
[UserDefaults setObject:fullPath forKey:fileName];
UIAlertView* alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"下载完成！" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}];
[task resume];
}
下载完成后获取下载文件，存在该文件则返回路径，否则返回空字符串
-(NSString*)getLocalVedio:(NSString *)strUrl
{
NSString* localUrl = [UserDefaults objectForKey:GetFileName];
if (localUrl) {
return localUrl;
}else
{
return @"";
}
}
完成MJDownLoad之后要对MJPlayerView进行调整，让player可以在本地存在缓存时不再请求网络数据
在initMJPlayer这个方法中，对playerItem进行初始化的时候去判定是否存在本地缓存，存在则用本地缓存去初始化，否则正常流程
if (![[[MJDownLoad shareInstanceManager]getLocalVedio:vedioUrl] isEqualToString:@""]) {
NSURL *sourceMovieUrl = [NSURL fileURLWithPath:[[MJDownLoad shareInstanceManager]getLocalVedio:vedioUrl]];
AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:sourceMovieUrl options:nil];
self.playerItem = [AVPlayerItem playerItemWithAsset:movieAsset];
self.downLoadBtn.selected = YES;
}else
{
self.playerItem = [AVPlayerItem playerItemWithURL:videoUrl];
[[MJDownLoad shareInstanceManager]downLoadWithUrl:vedioUrl];
}
最后对点击下载按钮的事件进行实现
#pragma Mark----downLoadBtn下载按钮点击事件
-(void)downLoadBtnPress:(UIButton*)sender
{
if(!sender.selected)
{
[[MJDownLoad shareInstanceManager]downLoadWithUrl:vedioUrl];
}else
{
sender.userInteractionEnabled = NO;
}
}
