Found an unexpected Mach-O header code: 0x72613c21 in Xcode 7

Check two things for every framework: The Mach-O type of the framework (in Build Settings of the framework target) Whether you copy the framework by putting it in Build Phases -> Embed Frameworks (or Copy Bundle Resources as mentioned by a. brooks hollar) If the Mach-O type of the framework is “static library”, it should … Read more

Creating a JSON Store For iPhone

When deciding what persistence to use, it’s important to remember that Core Data is first and foremost an object graph management system. It true function is to create the runtime model layer of Model-View-Controller design patterned apps. Persistence is actually a secondary and even optional function of Core Data. The major modeling/persistence concerns are the … Read more

How are integers internally represented at a bit level in Java?

Let’s start by summarizing Java primitive data types: byte: Byte data type is an 8-bit signed two’s complement integer. Short: Short data type is a 16-bit signed two’s complement integer. int: Int data type is a 32-bit signed two’s complement integer. long: Long data type is a 64-bit signed two’s complement integer. float: Float data … Read more