Switching branch on Xcode 9
Press ⌘2 to open the new Source Control Navigator. Right-click on the master icon. To switch to a different branch Right-click on a non-current branch Choose Checkout… Press ↩ or click on the Checkout button.
xcode9-beta
“This function declaration is not a prototype” warning in Xcode 9
The block declaration with empty parenthesis: void (^)() has the same semantics as a function pointer with empty parenthesis: void (*)() It does not mean that there are no arguments. It means the arguments are not specified, therefore it opens the way to bugs since you can call it in the following ways: void (^block)() … Read more
Illegal Configuration: Compiling IB documents for earlier than iOS 7 is no longer supported
XCode 9 will not support storyboards that are built for iOS version less than 7. Try changing the Builds for in File Inspector to a higher version then Clean and Build. See screenshot Edit: Important info from @user435779 below: Restart XCode if the errors don’t go away.
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]
It’s hard to find the UI code which is not executed in main thread sometimes. You can use the trick below to locate it and fix it. Choose Edit Scheme -> Diagnostics, tick Main Thread Checker. Xcode 11.4.1 Click the small arrow next to the Main Thread Checker to create a Main Thread Checker breakpoint. … Read more
iOS 11 iPhone X simulator UITabBar icons and titles being rendered on top covering eachother
I was able to get around the problem by simply calling invalidateIntrinsicContentSize on the UITabBar in viewDidLayoutSubviews. -(void)viewDidLayoutSubviews { [super viewDidLayoutSubviews]; [self.tabBar invalidateIntrinsicContentSize]; } Note: The bottom of the tab bar will need to be contained to the bottom of the main view, rather than the safe area, and the tab bar should have no … Read more
Xcode 9 – “Fixed Width Constraints May Cause Clipping” and Other Localization Warnings
I was getting the same warnings even without multiple languages in my app, which led me to find out what was really going on. . . There are a few different things going on here. I was able to silence the fixed-width warnings in my own app by changing the width of the object spacings … Read more
How to quit or close single simulator from opened multiple simulator in Xcode 9?
Select Simulator.. Go into File Menu -> Close window or press [Command + W ]. It will close the simulator which is on top . Go into Windows menu -> uncheck Show Device Bezels. Then you can close using red cross icon on simulator.
The use of Swift 3 @objc inference in Swift 4 mode is deprecated?
I got rid of this warning by changing the “Swift 3 @objc Inference” build setting of my targets to “Default”. From this article: Before Swift 4, the compiler made some Swift declarations automatically available to Objective-C. For example, if one subclassed from NSObject, the compiler created Objective-C entry points for all methods in such classes. … Read more