1.下载本地文件
1.将文件放入项目中（文件名不能为中文）
NSString *fileNameStr = @"Authorization";
NSString *path = [[NSBundle mainBundle] pathForResource:fileNameStr ofType:@"doc"];
NSString *encodedString = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL fileURLWithPath:encodedString];
NSArray *dataAry = @[url];
UIActivityViewController *activityController=[[UIActivityViewController alloc]initWithActivityItems:dataAry applicationActivities:nil];
[self.navigationController presentViewController:activityController animated:YES completion:nil];
2.若文件名为中文，需做处理：
NSString *fileNameStr = @"模版";
// 法定代表人证明书
NSString *path = [[NSBundle mainBundle] pathForResource:fileNameStr ofType:@"doc"];
//此时，此行代码已无效
//NSString *encodedString = [path stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//需使用此行代码，解决文件名中文乱码问题
NSString * encodedString = [path stringByRemovingPercentEncoding];
NSURL *url = [NSURL fileURLWithPath:encodedString];
NSArray *dataAry = @[url];
UIActivityViewController *activityController=[[UIActivityViewController alloc]initWithActivityItems:dataAry applicationActivities:nil];
[self.navigationController presentViewController:activityController animated:YES completion:nil];
2.通过接口下载文件（接口返回数据流）
返回数据示例：
WechatIMG1.jpeg
NSString *nameStr = @"";//文件名
NSString *strUrl =@"";//接口名
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.requestSerializer.timeoutInterval = 60;
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager GET:strUrl parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
NSLog(@"%@",responseObject);
// 获取数据流，写入本地
[self writeToFile:responseObject fileName:nameStr];
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
NSLog(@"%@",error);
}];
// 写入文件
-(void)writeToFile:(NSData *)data fileName:(NSString *)fileName{
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * _filePath = [paths objectAtIndex:0];
fileName = [NSString stringWithFormat:@"%@.doc",fileName];
NSString * filePath = [_filePath stringByAppendingPathComponent:fileName];
// NSData写入文件
[data writeToFile:filePath atomically:YES];
NSLog(@"fileDataPath is %@", filePath);
NSString *encodedString = [filePath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
self.fileUrl = [NSURL fileURLWithPath:encodedString];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"下载成功" message:@"是否保存文件？" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex NS_DEPRECATED_IOS(2_0, 9_0)
{
if(buttonIndex == 1)
{
NSArray *dataAry = @[self.fileUrl];
UIActivityViewController *activityController=[[UIActivityViewController alloc]initWithActivityItems:dataAry applicationActivities:nil];
[self.navigationController presentViewController:activityController animated:YES completion:nil];
}
}
3.通过接口下载文件（接口返回文件存储地址）
需要导入工具类，链接: https://pan.baidu.com/s/1puLhN5rKpvS_cVY-iWWGUA 提取码: yyuj
#pragma mark - 下载文件
- (void)downloadFile:(NSString *)fileStr{
// fileStr即接口返回的链接
[SVProgressHUD show];
/*
1. NSDocumentDirectory
下载文件到该目录，则该文档可以用 iTunes 直接查看。对于安全性不高，便于浏览的文件，pdf ，可以考虑下载到该目录。、
2. NSLibraryDirectory
下载文件到该目录，则该文档不可用 iTunes 直接查看。只能在 APP 内部查看，对于文件有安全性方面的考虑，可以下载到该 目录。
3.NSCachesDirectory
该目录存放的主要是缓存文件，如 图片的缓存数据等。不适合存放永久性的文件。
*/
//设置下载文件保存的目录
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* _filePath = [paths objectAtIndex:0];
//Encode Url 如果Url 中含有空格，一定要先 Encode
fileStr = [fileStr stringByReplacingOccurrencesOfString:@" " withString:@""];
//创建 Request
NSURLRequest* request = [NSURLRequest requestWithURL:[NSURL URLWithString:fileStr]];
NSString* fileName = @"";//文件名
NSString* filePath = [_filePath stringByAppendingPathComponent:fileName];
//下载进行中的事件
AFURLConnectionOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.outputStream = [NSOutputStream outputStreamToFileAtPath:filePath append:NO];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead,long long totalBytesRead,long long totalBytesExpectedToRead) {
//下载的进度，如 0.53，就是 53%
float progress = (float)totalBytesRead / totalBytesExpectedToRead;
//下载完成的事件该方法会在下载完成后延迟 2秒左右执行 根据完成后需要处理的及时性不高，可以采用该方法
[operation setCompletionBlock:^{
[SVProgressHUD dismiss];
self.filePath = filePath;
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"下载成功" message:@"是否预览文件？" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alert show];
}];
[operation start];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex NS_DEPRECATED_IOS(2_0, 9_0)
{
if(buttonIndex == 1)
{
NSLog(@"ok");
ShowFileViewController *vc = [[ShowFileViewController alloc] init];
vc.filePath = self.filePath;
[[Singleton singleton].myViewController.navigationController pushViewController:vc animated:YES];
}
}
预览文件
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.title = @"文件预览";
[self.view addSubview:self.webView];
// 保存文件
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"组-1"] style:UIBarButtonItemStylePlain target:self action:@selector(saveAction)];
}
-(UIWebView *)webView
{
if (!_webView) {
_webView = [[UIWebView alloc] init];
_webView.frame = CGRectMake(0,KNavHeight, self.view.frame.size.width, self.view.frame.size.height-KNavHeight);
//UIDataDetectorTypes自动检测电话、网址和邮箱
//禁止数字链接
//_webView.dataDetectorTypes = UIDataDetectorTypeNone;
_webView.delegate = self;
_webView.backgroundColor = [UIColor clearColor];
NSURL *url = [NSURL fileURLWithPath:self.filePath];
_webView.scalesPageToFit = YES;
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
}
return _webView;
}
// 保存文件
- (void)saveAction{
NSData *data = [NSData dataWithContentsOfFile:self.filePath];
NSArray *ary = @[data];
UIActivityViewController *activityController=[[UIActivityViewController alloc]initWithActivityItems:ary applicationActivities:nil];
[self.navigationController presentViewController:activityController animated:YES completion:nil];
}
