IOS: When you cut back to the app, there will be flashes, flashes of the main screen phenomenon __ios

A particularly strange bug was found during the recent test, when the app returned to the background, the current app was not killed, and then the app was cut back, and the main screen flashed.

Finally lock the culprit, when the settings return button does not display text, use the following method, causing flash, after this method is dropped, this problem resolves

Sets the text position of the return button to not appear on the screen

[[Uibarbuttonitem appearance] Setbackbuttontitlepositionadjustment:uioffsetmake (Nsintegermin, NSIntegerMin) Forbarmetrics:uibarmetricsdefault];

The problem is solved, but the return button followed by the text again appeared, swollen mody, do not worry, in your viewcontrol to redefine a method, preferably in the Father Viewcontrol, because it is more convenient

Uibarbuttonitem *btn_back = [[Uibarbuttonitem alloc]init];

Btn_back = @ "";

Self.navigationItem.backBarButtonItem = Ban_back;

Then recompile your app, and then look at this time, Flash will not appear, and you asked for the return button no text is also perfect standards.