Simple usage of iosnsoperation

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#import "ViewController.h"

@interface viewcontroller ()

@end

@implementation Viewcontroller

-(void) viewdidload {

[superviewdidload];

#if 0

//Nsoperation/nsoperationqueue is an object-oriented multithreaded class GCD based on the GCD package is a pure C-language GC D relatively efficient

//nsoperation/nsoperationqueue Development Steps

//1. Create nsoperation object that encapsulates the task in the object.

//2. Create Nsoperationqueue operation queue, which will nsoperation The object is thrown into the operations queue.

//3. after the operation is added to the operation queue, the system automatically takes the actions in the queue and puts them on the thread.

//nsoperation is an abstract class ( a class that cannot instantiate an object ). He has two sub-categories .

//Nsinvocationoperation

//Nsblockoperation

// Create an Action object, you must use these subclasses to instantiate

///nsoperationqueue operation queue only two kinds,

//1. Custom Action queue, by alloc Init created by. The task for this queue executes concurrently in the child thread.

//2. Home Row similar to the GCD master queue, The tasks that are added to the master queue are executed in the main thread.

//[Nsoperationqueue mainqueue]; How to get the home row

// Create an Action object that encapsulates the task.

nsinvocationoperation *invoperation = [[nsinvocationoperation alloc]initwithtarget: Self Selector:@selector(Test) object:nil];

// perform the task in action. executed in the main thread by default

[Invoperation start];

// Create operation, task saved in block

Nsblockoperation *blockoperation = [Nsblockoperation blockoperationwithblock:^{

NSLog (@ "blockoperation thread =%@", [Nsthread CurrentThread]);

}];

for (int i =0; i< ; i++) {

[Blockoperation addexecutionblock:^{

NSLog (@ "blockoperation%d thread =%@", I,[nsthread CurrentThread]);

}];

}

// perform the task in action. executed in the main thread by default, if the number of tasks in Blockoperation is greater than 1 , the other tasks are executed in the child thread

[Blockoperation start];

#else

//---------- actual use ------------------

//1. Create an Action object

nsinvocationoperation *invocationop = [[nsinvocationoperation Alloc]initwithtarget:selfselector: @selector (test) Object : Nil ];

nsblockoperation *blockop = [nsblockoperation Blockoperationwithblock: ^{

for (int i =0; i<5; i++) {

NSLog(@ "Blockop thread =%@", [nsthreadcurrentthread]);

}

}];

//2. adding an Action object to the operations queue , tasks that are added to the queue are automatically executed in the child threads.

// Create action queue

nsoperationqueue *queue = [[nsoperationqueuealloc ]init];

[Queue addoperation: Invocationop];

[Queue addoperation: Blockop];

for (int i =0; i<5; i++) {

nsblockoperation *bop = [nsblockoperationBlockoperati Onwithblock: ^{

NSLog(@ "Blockop i =%d thread =%@", i,[nsthread CurrentThread ]);

}];

// Add to the main queue the task is executed sequentially in the main thread.

//[[Nsoperationqueue Mainqueue] addoperation:bop];

}

#endif

}

-(void) test

{

for (int i =0; i<5; i++ ) {

NSLog(@ "invocationoperation thread =%@", [nsthread CurrentThread ]);

}

}

@end

Simple usage of iosnsoperation