//Check if we have any search terms in the search dictionary.
if( (searchBar.text==(id) [NSNull null] || [searchBar.text length]==0 || searchBar.text isEqual:@""))
[AlertView showAlert:@"Please enter a search string"];
|Famous painting by Armand Gauiter (19th century) depicting eight women with different mental disorders.|
[Source : Internet]
Q: Does iOS support multitasking?
Q:How can we achieve singleton pattern in iOS?
NSApplication, and, in UIKit,
UIApplication. A process is limited to one instance of these classes. When a client asks the class for an instance, it gets a shared instance, which is lazily created upon the first request.
Q:What is delegate pattern in iOS?
NSXMLParserobject) that is seeking to accomplish something, but can only do so in a generic fashion. The delegate, which is almost always an instance of a custom class, acts in coordination with the host object, supplying program-specific behavior at certain points in the task. Thus delegation makes it possible to modify or extend the behavior of another object without the need for subclassing.
It’s nice to see they’re working on it.