Grand Central Dispatch (GCD):
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What is Grand central dispatch.
What is Grand central dispatch.
suggest changeWhat is Concurrency?
- Doing multiple things at the same time.
- Taking advantage of number of cores available in multicore CPUs.
- Running multiple programs in parallel.
Objectives of Concurrency
- Running program in background without hogging CPU.
- Define Tasks, Define Rules and let the system take the responsibility of performing them.
- Improve responsiveness by ensuring that the main thread is free to respond to user events.
DISPATCH QUEUES
Grand central dispatch – dispatch queues allows us to execute arbitrary blocks of code either asynchronously or synchronously All Dispatch Queues are first in – first out All the tasks added to dispatch queue are started in the order they were added to the dispatch queue.
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Table Of Contents
2
Blocks
5
Logging
6
NSArray
8
NSString
10
NSDictionary
12
NSArray
13
NSURL
14
Methods
16
Enums
17
NSData
19
Properties
20
NSDate
21
NSPredicate
26
Singletons
27
NSCalendar
31
NSTimer
32
Structs
33
Subscripting
38
Inheritance
43
XML Parsing
46
NSCache
47
Grand Central Dispatch (GCD)
50
NSObject
53
Contributors