Cannot show modal ViewController in iOS7

Question

I tried to show system defined viewcontrollers (MFMailComposeViewController, TWTweetComposeViewController,etc..) as a modal view.

But these viewcontrollers dosn\'t a

Answer 1

Turns out the issue only shows up when customizing UIBarButtons. If we use the following in our 32-bit app running on iPhone 5s, we have the problem:

[[UIBarButtonItem appearance] setTitlePositionAdjustment:UIOffsetMake(0, 1.0)
                                           forBarMetrics:UIBarMetricsDefault];

Leaving out that line works around the problem. We have filed a radar.

Answer 2

NSXPCConnectionInterrupted = 4097. I would have your code retry the command as the error looks to be transient.

Answer 3

I had the same error when use SLComposeViewController to share with Facebook or Twitter using the simulator of 64-Bits or an iPhone 5s, then i delete every line of code that use "appearance, for example [UITableViewCell appearance] or [UIBarButtonItem appearance], and every run ok.

Answer 4

This post helped me find a solution to a similar issue. But my problem was not related to the tab bar, so I figured I'd share if anyone else comes across this post:

The mail modal opened when tapping a table cell, but would instantly dismiss. In my case, this code caused the problem:

[[UILabel appearanceWhenContainedIn:[UITableViewHeaderFooterView class], nil] setFont:[UIFont systemFontOfSize:17.0]];

I deleted it, and everything works!