Whatsapp 图像共享不起作用答案

【问题标题】：Whatsapp Image sharing not workingWhatsapp 图像共享不起作用
【发布时间】：2014-12-09 13:56:09
【问题描述】：

我的班级实现了UIDocumentInteractionControllerDelegate，我有以下属性：@property (nonatomic,retain) UIDocumentInteractionController * documentInteractionController;

if ([[UIApplication sharedApplication] canOpenURL: [NSURL URLWithString:@"whatsapp://app"]]) {
    UIImage     *iconImage = [UIImage imageNamed:@"bg_iPhone_5.jpg"];
    NSString    *savePath  = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/whatsAppTmp.wai"];

    [UIImageJPEGRepresentation(iconImage, 1.0) writeToFile:savePath atomically:YES];
    _documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:savePath]];
    _documentInteractionController.UTI = @"net.whatsapp.image";
    _documentInteractionController.delegate = self;
    [_documentInteractionController presentOpenInMenuFromRect:CGRectMake(0, 0, 0, 0) inView:self.view animated: YES];
}
else {
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"WhatsApp not installed." message:@"Your device has no WhatsApp installed." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

您好，我已使用此代码，但图像共享不起作用。 DocumentInteractionController 启动一个带有 whatsapp 图标的屏幕，当我点击它时，我的应用程序崩溃了。

【问题讨论】：

launchServices: 调用了 invalidationHandler。我在调试区得到了这个。
您是否调试过代码，例如确保图像已写入？因为你根本不检查这个。另外，为了获取文档目录，添加到 NSHomeDirectory() 并不是真正正确的。使用URLForDirectory:inDomain:appropriateForURL:create:error:
你能告诉我使用NSHomeDirectory的确切方法吗？
看我的回答，这应该对你有帮助。如果任何NSLog 被触发，您将在调试输出中记录错误，这将告诉您更多关于在哪里可以找到您的问题
我把解决方案放在这里stackoverflow.com/questions/8354417/…

标签： ios image whatsapp uidocumentinteraction

【解决方案1】：

这里是设置用于写出临时图像的 URL 的正确方法的代码：

if ([[UIApplication sharedApplication] canOpenURL: [NSURL URLWithString:@"whatsapp://app"]]) {
    NSError *error = nil;
    NSURL *documentURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:&error];
    if (!documentURL) {
        NSLog(@"Error getting doucment directory: %@", error);
    }

    NSURL *tempFile = [documentURL URLByAppendingPathComponent:@"whatsAppTmp.wai"];
    UIImage *iconImage = [UIImage imageNamed:@"bg_iPhone_5.jpg"];

    NSData *imageData = UIImageJPEGRepresentation(iconImage, 1.0) ;
    if (![imageData writeToURL:tempFile options:NSDataWritingAtomic error:&error]) {
        NSLog(@"Error writing File: %@", error);
    }

    self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:tempFile];
    self.documentInteractionController.UTI = @"net.whatsapp.image";
    self.documentInteractionController.delegate = self;
    [self.documentInteractionController presentOpenInMenuFromRect:CGRectMake(0, 0, 0, 0) inView:self.view animated: YES];
}
else {
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"WhatsApp not installed." message:@"Your device has no WhatsApp installed." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

【讨论】：

非常感谢。完美运行！
嗨，如何在分享图片时添加文字
我想分享一个与图片相关的链接，请帮忙

【解决方案2】：

要使用 WhatsApp 共享图像，请使用以下代码。它工作正常。

if ([[UIApplication sharedApplication] canOpenURL: [NSURL URLWithString:@"whatsapp://app"]]){

        UIImage     * iconImage = [UIImage imageNamed:@"my_account.png"];
        NSString    * savePath  = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/whatsAppTmp.wai"];

        [UIImageJPEGRepresentation(iconImage, 1.0) writeToFile:savePath atomically:YES];

        _documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:savePath]];
        _documentInteractionController.UTI = @"net.whatsapp.image";
        _documentInteractionController.delegate = self;

        [_documentInteractionController presentOpenInMenuFromRect:CGRectMake(0, 0, 0, 0) inView:self.view animated: YES];


    } else {
        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"WhatsApp not installed." message:@"Your device has no WhatsApp installed." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
    }

【讨论】：

【解决方案3】：

对我来说，当我使用 documentInteractionController 作为属性时，问题得到了解决。之前我在 share 方法中使用它作为局部变量。

【讨论】：