What are the Xcode Versions ?
Version Release date OS X SDK(s) iOS SDK(s) Runs on versions of OS X Deployment Target 4.3 February 16, 2012 OS X Snow Leopard (10.6.8) and OS X Lion (10.7.x) iOS 5.0 OS X Lion (10.7.x) From iOS 3.0 to iOS 5.0 4.3.1…
What is Object Oriented Programming( OOP ) Concept ?
Object Oriented Programming Object-oriented programming (OOP) is a programming paradigm that uses “Objects “and their interactions to design applications and computer programs. There are different types of OOPs are used, they are Object Class Data…
How to renaming a sqlite table programatically in iphone?
How to renaming a sqlite table programatically in iphone? SQLite supports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table, to rename a column within a table, or to add a new column to an existing…
How to create sqlite database programmatically?
How to create sqlite database programmatically? SQLite isn’t the only way to persist data on iOS. Besides Core Data, there are lots of other alternatives for data persistence, including Realm, Couchbase Lite, Firebase, and NSCoding. SQLite does have some…
How to create table in sqlite data base programmatically in iPhone
How to create table in sqlite data base programmatically in iPhone The database that can be used by apps in iOS (and also used by iOS) is called SQLite, and it’s a relational database. It is contained in a C-library that is embedded to the app…
iphone Interview Questions part-14
151-Types of NSTableView Cell based and View based. In view based we can put multiple objects. 152-Abstract class in cocoa. Cocoa doesn’t provide anything called abstract. We can create a class abstract which gets check only at runtime, compile time this…
iphone Interview Questions part-13
141-Helper Objects Helper Objects are used throughout Cocoa and CocoaTouch, and usually take the form of a delegate or dataSource. They are commonly used to add functionality to an existing class without having to subclass it. 142-Cluster Class Class…
iphone Interview Questions part-12
121- Formal vs informal protocol. In addition to formal protocols, you can also define an informal protocol by grouping the methods in a category declaration: @interface NSObject (MyProtocol) //someMethod(); @end Informal protocols are typically declared…
iphone Interview Questions part-11
111- Objective-C. Objective-C is a very dynamic language. Its dynamism frees a program from compile-time and link-time constraints and shifts much of the responsibility for symbol resolution to runtime, when the user is in control. Objective-C is more…
iphone Interview Questions part-10
101-What is polymorphism? This is very famous question and every interviewer asks this. Few people say polymorphism means multiple forms and they start giving example of draw function which is right to some extent but interviewer is looking for more…