How can I create a text file (an Excel开发者_开发知识库-compatible CSV file), add some text to it, and then attach it to an email - all in an iPhone app on the spot.
I've read from a text file before. I've also emailed in an app before. I just need to be able to put it all together, except this time write to a file and attach it to the email.
How can this be done?
Use the addAttachmentData method of MFMailComposeViewController?
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It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
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