需求：银行项目要实现调起iPhone原生面板实现转账流水等PDF文件的分享
代码：
1.首先要在项目的 Build Phases 中导入social.framework
2.在要实现的类中导入头文件 #import <Social/Social.h>
示例代码：
- (void)showNormalActivityShareWithFilePath:(NSURL*)path{
NSArray *activityItems = @[path];
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
//__weak typeof(self) weakself = self;
activityVC.completionWithItemsHandler = ^(UIActivityType _Nullable activityType, BOOL completed, NSArray * _Nullable returnedItems, NSError * _Nullable activityError) {
// if (activityType == nil && activityError == nil && completed == NO) {
// //关闭了分享弹框，给h5回调失败
// }else if (activityType != nil && completed) {
// // 分享成功，给h5回调
//
// }else if (activityType != nil && activityError != nil) {
// // 操作失败，给h5回调;
// }else if (activityType != nil && completed == NO) {
// // 操作失败，给h5回调
// // 备忘录取消操作
// }else {
// //给h5回调
// }
//上面判断是写的失败详细内容，若需求不需要这么详细，直接下面这段代码就可以
if (activityType != nil && completed) {
//分享成功，给h5回调成功
[YNETAlertView showStatus:@"分享成功"];
}else{
//给h5回调失败
[YNETAlertView showStatus:@"分享失败"];
}
};
[self presentViewController:activityVC animated:YES completion:^{
}];
}
- (void)testMethod{
//1.通过url下载pdf,存入沙盒调起系统分享面板
NSString *fileStr = @"http://xxxxxxxxxx/12.pdf";
//下载文件
NSURLRequest * requst = [NSURLRequest requestWithURL:[NSURL URLWithString:fileStr]];
[YNETProgressHUD show];
NSURLSessionDownloadTask *download = [[AFHTTPSessionManager manager] downloadTaskWithRequest:requst progress:^(NSProgress * _Nonnull downloadProgress) {
NSLog(@"下载进度%f",1.0* downloadProgress.completedUnitCount/downloadProgress.totalUnitCount);
} destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
return [NSURL fileURLWithPath:fullPath];
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
NSLog(@"下载文件的本地地址%@",filePath);
[YNETProgressHUD dismiss];
if (filePath!=nil) {
[self showNormalActivityShareWithFilePath:filePath];
}
}];
//启动下载任务
[download resume];
//下面这段代码是模仿跟前端交互，前端传过来base64图片或者有其他文件转成的base64字符串进行解析模拟，一般文件都通过url下载后再调用系统面板，系统会自动解析分享的文件大小、格式，选择能打开文件的APP在面板上展示
//2.通过base64字符串，转成nadata,再存入沙盒
//图片转base64
UIImage *img = [UIImage imageNamed:@"我的背景"];
NSData *imgData = UIImagePNGRepresentation(img);
NSString *base64Str = [imgData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
//base64转nsdata
NSData *showData = [[NSData alloc]initWithBase64EncodedString:base64Str options:NSDataBase64DecodingIgnoreUnknownCharacters];
//把data写入沙盒
NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
NSString *path = [NSString stringWithFormat:@"%@/%@",documentDirectory,@"img.png"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDir;
NSLog(@"写入沙盒地址---%@",path);
//先判断目录是否存在，不存在才创建
if (![fileManager fileExistsAtPath:path isDirectory:&isDir]) {
BOOL res = [fileManager createFileAtPath:path contents:showData attributes:nil];
if (res) {
[self showNormalActivityShareWithFilePath:[NSURL fileURLWithPath:path]];
}
}
}
只要url正常下载文件成功，实现上面的方法就可以啦
注意：pdf等文件只能给路径，不然系统面板不会显示微信、微博、QQ这些软件选项
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