//
// ZYOperationViewController.h
// Thread
//
// Created by ninglihuan on 14
//
// ZYOperation.h
// Thread
//
// Created by yejiong on 14/11/4.
// Copyright © 2014年 zzz. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface ZYOperation : NSOperation
@property (nonatomic, copy) NSString* operationName;
@end
//
// ZYOperation.m
// Thread
//
// Created by yejiong on 14/11/4.
// Copyright © 2014年 zzz. All rights reserved.
//
#import "ZYOperation.h"
@implementation ZYOperation
- (void)dealloc {
[_operationName release];
[super dealloc];
}
//重写 main 方法，在这里写入我们需要在线程中执行的代码。
- (void)main {
// NSLog(@"--------%@", [NSThread currentThread]);
//
// if ([NSThread isMainThread]) {
// NSLog(@"主线程");
// }else {
// NSLog(@"分线程");
// }
NSLog(@"%@", _operationName);
}
@end
/11/4.
// Copyright © 2014年 zzz. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ZYOperationViewController : UIViewController
@end
//
// ZYOperationViewController.m
// Thread
//
// Created by ninglihuan on 14/11/4.
// Copyright © 2014年 ninglihuan. All rights reserved.
//
#import "ZYOperationViewController.h"
#import "ZYOperation.h"
@interface ZYOperationViewController () {
NSOperationQueue* _operationQueue;
}
@property (nonatomic, retain) NSBlockOperation* blockOperation1;
@end
@implementation ZYOperationViewController
- (void)dealloc {
[_operationQueue release];
[_blockOperation1 release];
[super dealloc];
}
- (void)viewDidLoad {
self.view.backgroundColor = [UIColor whiteColor];
_operationQueue = [[NSOperationQueue alloc] init];
//设置最大并发数，同时最多有多少线程在执行。
_operationQueue.maxConcurrentOperationCount = 3;
//使用 NSBlockOperation 的时候需要注意是否造成循环引用。
__block ZYOperationViewController* blockSelf = self;
self.blockOperation1 = [NSBlockOperation blockOperationWithBlock:^{
blockSelf.view.backgroundColor = [UIColor redColor];
}];
//没有造成循环引用。
NSBlockOperation* blockOperation = [NSBlockOperation blockOperationWithBlock:^{
self.view.backgroundColor = [UIColor redColor];
}];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
//NSOperation 是一个抽象类，我们不能使用它的对象，必须使用它子类的对象。
//系统提供了两个子类：NSInvocationOperation，NSBlockOperation。
//我们也可以自定义 NSOperation 子类，重写 mian 方法，然后把 operation 对象添加到 NSOperationQueue 中，就会自动在分线程执行 main 方法。
// [self invocationOperation];
// [self blockOperation];
//自定义
[self customOperation];
}
- (void)invocationOperation {
NSInvocationOperation* invocationOperation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(run:) object:@"123"];
//使用 start 在主线程执行任务。
// [invocationOperation start];
//如果需要在分线程执行任务，把对象添加到 NSOperationQueue，就会自动的在分线程执行任务。
[_operationQueue addOperation:invocationOperation];
[invocationOperation release];
}
- (void)blockOperation {
NSBlockOperation* blockOperation = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"1--------%@", [NSThread currentThread]);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
}];
//主线程
// [blockOperation start];
//分线程
// [_operationQueue addOperation:blockOperation];
[blockOperation addExecutionBlock:^{
NSLog(@"2--------%@", [NSThread currentThread]);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
}];
[blockOperation addExecutionBlock:^{
NSLog(@"3--------%@", [NSThread currentThread]);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
}];
[blockOperation addExecutionBlock:^{
NSLog(@"4--------%@", [NSThread currentThread]);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
}];
[blockOperation addExecutionBlock:^{
NSLog(@"5--------%@", [NSThread currentThread]);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
}];
//addExecutionBlock，并发的执行多个 block 任务，系统自动分配到当前空闲的线程，可能是主线程也可能是分线程。
// [blockOperation start];
//全部在分线程并发执行。
[_operationQueue addOperation:blockOperation];
}
- (void)customOperation {
ZYOperation* operation = [[ZYOperation alloc] init];
operation.operationName = @"1111";
ZYOperation* operation1 = [[ZYOperation alloc] init];
operation1.operationName = @"2222";
ZYOperation* operation2 = [[ZYOperation alloc] init];
operation2.operationName = @"3333";
//设置线程间的依赖关系。让一个线程等待另外一个线程执行完毕再开始执行。
[operation addDependency:operation1];
[_operationQueue addOperation:operation];
[_operationQueue addOperation:operation1];
[_operationQueue addOperation:operation2];
[operation release];
[operation1 release];
[operation2 release];
}
- (void)run:(id)object {
NSLog(@"%@", object);
if ([NSThread isMainThread]) {
NSLog(@"主线程");
}else {
NSLog(@"分线程");
}
//仍然使用这个方法回到主线程。
// self performSelectorOnMainThread:<#(nonnull SEL)#> withObject:<#(nullable id)#> waitUntilDone:<#(BOOL)#>
}
@end
