Jonah questions

Jonah answers

• Does performSelectorInBackground spawn new thread for each call?
• Swift type inference and type checking issue
• Replace remote master branch with my local
• iOS: Can't set navigation bar tint color
• How to change sequence of button in UIActionsheet in iPhone?
• When to use -retainCount?
• Xcode 6.3 - Auto property synthesis will not synthesize property
• How to choose TDD starting point in a real world project?
• Ruby Method Lookup (comparison with JavaScript)
• How to display compiler output or custom build steps output when building with xcode?