1.NSOperation
NSInvocationOperation
- (void)invocationOperation{
NSInvocationOperation *invOpt = [[NSInvocationOperation alloc] initWithTarget:self
selector:@selector(run)
object:nil];
[invOpt start];
}
//2016-08-09 18:47:04.620 NSOperation[48338:755464] run-----{number = 1, name = main}
NSBlockOperation
- (void)blockOperation1{
NSBlockOperation *blockOpt = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"下载1------%@", [NSThread currentThread]);
}];
[blockOpt start];
}
//2016-08-09 18:51:04.787 NSOperation[48546:758737] 下载1------{number = 1, name = main}
一个NSOperation执行start操作,默认在主线程执行
- (void)blockOperation2{
NSBlockOperation *blockOpt = [NSBlockOperation blockOperationWithBlock:^{
// 在主线程
NSLog(@"下载1------%@", [NSThread currentThread]);
}];
// 添加额外的任务(在子线程执行)
[blockOpt addExecutionBlock:^{
NSLog(@"下载2------%@", [NSThread currentThread]);
}];
[blockOpt addExecutionBlock:^{
NSLog(@"下载3------%@", [NSThread currentThread]);
}];
[blockOpt addExecutionBlock:^{
NSLog(@"下载4------%@", [NSThread currentThread]);
}];
[blockOpt addExecutionBlock:^{
NSLog(@"下载5------%@", [NSThread currentThread]);
}];
[blockOpt addExecutionBlock:^{
NSLog(@"下载6------%@", [NSThread currentThread]);
}];
[blockOpt start];
}
//2016-08-09 18:57:23.753 NSOperation[48889:764202] 下载1------{number = 1, name = main}
//2016-08-09 18:57:23.754 NSOperation[48889:764202] 下载5------{number = 1, name = main}
//2016-08-09 18:57:23.754 NSOperation[48889:764202] 下载6------{number = 1, name = main}
//2016-08-09 18:57:23.753 NSOperation[48889:764231] 下载3------{number = 4, name = (null)}
//2016-08-09 18:57:23.753 NSOperation[48889:764238] 下载2------{number = 2, name = (null)}
//2016-08-09 18:57:23.753 NSOperation[48889:764232] 下载4------{number = 3, name = (null)}
NSBlockOperation封装的block操作数 >1 就会开启子线程异步并发执行
2.NSOperationQueue 与 NSOperation
NSInvocationOperation
- (void)run{
NSLog(@"run---%@",[NSThread currentThread]);
}
- (void)operationQueueWithInvocationOperation{
NSInvocationOperation *invOpe = [[NSInvocationOperation alloc] initWithTarget:self
selector:@selector(run)
object:nil];
NSOperationQueue *que = [[NSOperationQueue alloc] init];
[que addOperation:invOpe];
}
//2016-08-10 11:28:20.993 NSOperationQueue[53590:830749] run---{number = 2, name = (null)}
- (void)operationQueueWithBlockOperation{
NSBlockOperation *blockOpe = [[NSBlockOperation alloc] init];
[blockOpe addExecutionBlock:^{
[self run];
}];
NSOperationQueue *que = [[NSOperationQueue alloc] init];
[que addOperation:blockOpe];
}
//2016-08-10 11:34:22.216 NSOperationQueue[53877:834875] run---{number = 2, name = (null)}
把1个NSOperation添加到1个NSOperationQueue中,NSOperation封装的操作就会开启一个子线程 在子线程中执行
3.NSOperationQueue 与 自定义NSOperation
ZYXOperation.h
#import
@interface ZYXOperation : NSOperation
@end
ZYXOperation.m
#import "ZYXOperation.h"
@implementation ZYXOperation
/**
* 需要执行的任务
*/
- (void)main
{
for (NSInteger i = 0; i<5; i++) {
NSLog(@"download1 -%zd-- %@", i, [NSThread currentThread]);
}
if (self.isCancelled) {return;}
for (NSInteger i = 0; i<5; i++) {
NSLog(@"download2 -%zd-- %@", i, [NSThread currentThread]);
}
if (self.isCancelled) {return;}
for (NSInteger i = 0; i<5; i++) {
NSLog(@"download3 -%zd-- %@", i, [NSThread currentThread]);
}
if (self.isCancelled) {return;}
}
@end
- (void)operationQueueWithZYXOperation{
NSOperationQueue *que = [[NSOperationQueue alloc] init];
[que addOperation:[[ZYXOperation alloc] init]];
}
//2016-08-10 11:41:27.199 NSOperationQueue[54291:841376] download1 -0-- {number = 2, name = (null)}
//2016-08-10 11:41:27.200 NSOperationQueue[54291:841376] download1 -1-- {number = 2, name = (null)}
//2016-08-10 11:41:27.200 NSOperationQueue[54291:841376] download1 -2-- {number = 2, name = (null)}
//2016-08-10 11:41:27.202 NSOperationQueue[54291:841376] download1 -3-- {number = 2, name = (null)}
//2016-08-10 11:41:27.202 NSOperationQueue[54291:841376] download1 -4-- {number = 2, name = (null)}
//2016-08-10 11:41:27.203 NSOperationQueue[54291:841376] download2 -0-- {number = 2, name = (null)}
//2016-08-10 11:41:27.204 NSOperationQueue[54291:841376] download2 -1-- {number = 2, name = (null)}
//2016-08-10 11:41:27.204 NSOperationQueue[54291:841376] download2 -2-- {number = 2, name = (null)}
//2016-08-10 11:41:27.205 NSOperationQueue[54291:841376] download2 -3-- {number = 2, name = (null)}
//2016-08-10 11:41:27.206 NSOperationQueue[54291:841376] download2 -4-- {number = 2, name = (null)}
//2016-08-10 11:41:27.206 NSOperationQueue[54291:841376] download3 -0-- {number = 2, name = (null)}
//2016-08-10 11:41:27.207 NSOperationQueue[54291:841376] download3 -1-- {number = 2, name = (null)}
//2016-08-10 11:41:27.207 NSOperationQueue[54291:841376] download3 -2-- {number = 2, name = (null)}
//2016-08-10 11:41:27.208 NSOperationQueue[54291:841376] download3 -3-- {number = 2, name = (null)}
//2016-08-10 11:41:27.208 NSOperationQueue[54291:841376] download3 -4-- {number = 2, name = (null)}
- (void)operationQueue{
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperationWithBlock:^{
NSLog(@"download1 --- %@", [NSThread currentThread]);
}];
}
//2016-08-10 11:53:15.578 NSOperationQueue[54846:848301] download1 --- {number = 2, name = (null)}
4.NSOperationQueue 设置
/** 队列 */
@property (nonatomic, strong) NSOperationQueue *queue;
- (void)handleOperationQueue{
if (self.queue == nil) {
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperation:[[ZYXOperation alloc] init]];
self.queue = queue;
}
if (self.queue.isSuspended) {
// 恢复队列，继续执行
self.queue.suspended = NO;
} else {
// 暂停（挂起）队列，暂停执行
self.queue.suspended = YES;
}
// 取消掉队列中的操作
// [self.queue cancelAllOperations];
}
//queue.maxConcurrentOperationCount = 2;
queue.maxConcurrentOperationCount = 1; // 就变成了串行队列
5.NSOperation之间设置依赖
-(void)setOperationDependency{
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
NSBlockOperation *op1 = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"download1----%@", [NSThread currentThread]);
}];
NSBlockOperation *op2 = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"download2----%@", [NSThread currentThread]);
}];
NSBlockOperation *op3 = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"download3----%@", [NSThread currentThread]);
}];
NSBlockOperation *op4 = [NSBlockOperation blockOperationWithBlock:^{
for (NSInteger i = 0; i<10; i++) {
NSLog(@"download4----%@", [NSThread currentThread]);
}
}];
NSBlockOperation *op5 = [NSBlockOperation blockOperationWithBlock:^{
NSLog(@"download5----%@", [NSThread currentThread]);
}];
op5.completionBlock = ^{
NSLog(@"op5执行完毕---%@", [NSThread currentThread]);
};
// 设置依赖
[op3 addDependency:op1];
[op3 addDependency:op2];
[op3 addDependency:op4];
[queue addOperation:op1];
[queue addOperation:op2];
[queue addOperation:op3];
[queue addOperation:op4];
[queue addOperation:op5];
}
// 2016-08-10 13:42:50.489 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.489 NSOperation-操作依赖[60227:905725] download1----{number = 2, name = (null)}
// 2016-08-10 13:42:50.489 NSOperation-操作依赖[60227:905978] download5----{number = 5, name = (null)}
// 2016-08-10 13:42:50.489 NSOperation-操作依赖[60227:905724] download2----{number = 3, name = (null)}
// 2016-08-10 13:42:50.491 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.493 NSOperation-操作依赖[60227:905978] op5执行完毕---{number = 5, name = (null)}
// 2016-08-10 13:42:50.493 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.493 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.494 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.494 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.550 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.550 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.551 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.551 NSOperation-操作依赖[60227:905721] download4----{number = 4, name = (null)}
// 2016-08-10 13:42:50.551 NSOperation-操作依赖[60227:905721] download3----{number = 4, name = (null)}
6.NSOperationQueue 之间的通信
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
/**
* 线程之间的通信
*/
- (void)threadCommunication{
[[[NSOperationQueue alloc] init] addOperationWithBlock:^{
// 图片的网络路径
NSURL *url = [NSURL URLWithString:@"http://img.pconline.com.cn/images/photoblog/9/9/8/1/9981681/200910/11/1255259355826.jpg"];
// 加载图片
NSData *data = [NSData dataWithContentsOfURL:url];
// 生成图片
UIImage *image = [UIImage imageWithData:data];
// 回到主线程
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
self.imageView.image = image;
}];
}];
}
- (void)operationDependencyThreadCommunication{
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
__block UIImage *image1 = nil;
NSBlockOperation *download1 = [NSBlockOperation blockOperationWithBlock:^{
NSURL *url = [NSURL URLWithString:@"http://img.pconline.com.cn/images/photoblog/9/9/8/1/9981681/200910/11/1255259355826.jpg"];
NSData *data = [NSData dataWithContentsOfURL:url];
image1 = [UIImage imageWithData:data];
}];
__block UIImage *image2 = nil;
NSBlockOperation *download2 = [NSBlockOperation blockOperationWithBlock:^{
NSURL *url = [NSURL URLWithString:@"http://pic38.nipic.com/20140228/5571398_215900721128_2.jpg"];
NSData *data = [NSData dataWithContentsOfURL:url];
image2 = [UIImage imageWithData:data];
}];
// 合成图片
NSBlockOperation *combine = [NSBlockOperation blockOperationWithBlock:^{
// 开启新的图形上下文
UIGraphicsBeginImageContext(CGSizeMake(100, 100));
// 绘制图片
[image1 drawInRect:CGRectMake(0, 0, 50, 100)];
image1 = nil;
[image2 drawInRect:CGRectMake(50, 0, 50, 100)];
image2 = nil;
// 取得上下文中的图片
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
// 结束上下文
UIGraphicsEndImageContext();
// 回到主线程
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
self.imageView.image = image;
}];
}];
[combine addDependency:download1];
[combine addDependency:download2];
[queue addOperation:download1];
[queue addOperation:download2];
[queue addOperation:combine];
}