多线程的简单使用
//
//ViewController.m
//Created by S u p e r m a n on 2017/3/14.
//Copyright © 2017年张浩. All rights reserved.
//
#import"ViewController.h"
staticNSIntegerconstAddTag =100;
@interfaceViewController()
@property(nonatomic,strong)UIImageView* imageView;
@property(nonatomic,strong)NSArray* urlArr;
@end
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
self.urlArr=@[@"http://weixue.steptowin.com:8000/data/img/20160411/veuyytthy4b2_320_200.jpg",
@"http://weixue.steptowin.com:8000/data/img/20160528/qcxt7ow9syjo.png",
@"http://weixue.steptowin.com:8000/data/img/20160527/zeol7j6gsto9.png",
@"http://weixue.steptowin.com:8000/data/img/20160413/wag5q4elonh4_320_200.jpg",
@"http://weixue.steptowin.com:8000/data/img/20160411/veuyytthy4b2_320_200.jpg",
@"http://weixue.steptowin.com:8000/data/img/20160528/qcxt7ow9syjo.png",
@"http://weixue.steptowin.com:8000/data/img/20160527/zeol7j6gsto9.png",
@"http://weixue.steptowin.com:8000/data/img/20160413/wag5q4elonh4_320_200.jpg",
@"http://weixue.steptowin.com:8000/data/img/20160411/veuyytthy4b2_320_200.jpg",
@"http://weixue.steptowin.com:8000/data/img/20160528/qcxt7ow9syjo.png",
@"http://weixue.steptowin.com:8000/data/img/20160527/zeol7j6gsto9.png",
@"http://weixue.steptowin.com:8000/data/img/20160413/wag5q4elonh4_320_200.jpg"];
/*简单线程**/
//[self thread];
/*队列操作**/
//[self operation];
/*GCD**/
[selfGCD];
}
/**********线程Thread操作************/
- (void)thread {
_imageView= [[UIImageViewalloc]initWithFrame:CGRectMake(0,0,100,100)];
[self.viewaddSubview:_imageView];
UIButton*button=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];
button.frame=CGRectMake(50,500,220,25);
[buttonsetTitle:@"加载图片"forState:UIControlStateNormal];
//添加方法
[buttonaddTarget:selfaction:@selector(threadClick)forControlEvents:UIControlEventTouchUpInside];
[self.viewaddSubview:button];
}
- (void)threadClick {
[NSThreaddetachNewThreadSelector:@selector(threadRun)toTarget:selfwithObject:nil];
}
- (void)threadRun {
NSLog(@"callMainbefore_1");
NSURL*url=[NSURLURLWithString:self.urlArr.firstObject];
NSData*data=[NSDatadataWithContentsOfURL:url];
NSLog(@"callMainbefore_2");
/*
直到updateUI:做完了是否才开始往下操作
waitUntilDone:NO
2016-06-02 17:13:47.618多线程处理[10042:208753] callMainbefore_1
2016-06-02 17:13:47.673多线程处理[10042:208753] callMainbefore_2
2016-06-02 17:13:47.674多线程处理[10042:208753] callMainAfter
2016-06-02 17:13:52.675多线程处理[10042:208668] callMain
waitUntilDone:YES
2016-06-02 17:16:05.525多线程处理[10062:210446] callMainbefore_1
2016-06-02 17:16:05.607多线程处理[10062:210446] callMainbefore_2
2016-06-02 17:16:10.609多线程处理[10062:210347] callMain
2016-06-02 17:16:10.613多线程处理[10062:210446] callMainAfter
**/
[selfperformSelectorOnMainThread:@selector(updateUI:)withObject:datawaitUntilDone:YES];
NSLog(@"callMainAfter");
}
- (void)updateUI:(NSData*)imageData {
sleep(5);
NSLog(@"callMain");
self.imageView.image= [UIImageimageWithData:imageData];
}
/**********线程Thread结束************/
/**********队列操作************/
- (void)operation {
CGFloatspace =10;
CGFloatimageWH = (320-10*5)/4.0;
for(NSIntegeri =0; i
UIImageView* imageView = [[UIImageViewalloc]init];
[self.viewaddSubview:imageView];
imageView.frame=CGRectMake(space +(space+imageWH)*(i%4), space +(space+imageWH)*(i/4), imageWH, imageWH);
imageView.tag=AddTag+ i;
}
UIButton*button=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];
button.frame=CGRectMake(50,500,220,25);
[buttonsetTitle:@"加载图片"forState:UIControlStateNormal];
[buttonaddTarget:selfaction:@selector(operationClick)forControlEvents:UIControlEventTouchUpInside];
[self.viewaddSubview:button];
}
- (void)operationClick {
NSOperationQueue* queue = [[NSOperationQueuealloc]init];
queue.maxConcurrentOperationCount=2;
__weaktypeof(self)weakSelf =self;
for(NSIntegeri =0; i
UIImageView* imageView = [self.viewviewWithTag:AddTag+i];
imageView.image=nil;
NSBlockOperation* blockOp = [NSBlockOperationblockOperationWithBlock:^{
NSURL*url=[NSURLURLWithString:weakSelf.urlArr[i]];
NSData*data=[NSDatadataWithContentsOfURL:url];
dispatch_async(dispatch_get_main_queue(), ^{
//更新UI需要主线程
imageView.image= [UIImageimageWithData:data];
});
}];
if(i >0) {
/*就是依赖前面的**/
NSBlockOperation* preOperation = queue.operations[i-1];
[blockOpaddDependency:preOperation];
}
[queueaddOperation:blockOp];
}
}
/**********队列操作结束************/
/****************** GCD ******************/
- (void)GCD {
CGFloatspace =10;
CGFloatimageWH = (320-10*5)/4.0;
for(NSIntegeri =0; i
UIImageView* imageView = [[UIImageViewalloc]init];
[self.viewaddSubview:imageView];
imageView.frame=CGRectMake(space +(space+imageWH)*(i%4), space +(space+imageWH)*(i/4), imageWH, imageWH);
imageView.tag=AddTag+ i;
}
UIButton*button=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];
button.frame=CGRectMake(50,500,220,25);
[buttonsetTitle:@"加载图片"forState:UIControlStateNormal];
//添加方法
[buttonaddTarget:selfaction:@selector(GCDClick)forControlEvents:UIControlEventTouchUpInside];
[self.viewaddSubview:button];
}
/*串行执行**/
- (void)GCDClick {
__weaktypeof(self)weakSelf =self;
dispatch_queue_tserialQueue =dispatch_queue_create("LeeGCDQueue",DISPATCH_QUEUE_SERIAL);
for(NSIntegeri =0; i
UIImageView* imageView = [self.viewviewWithTag:AddTag+i];
imageView.image=nil;
dispatch_async(serialQueue, ^{
NSURL*url=[NSURLURLWithString:weakSelf.urlArr[i]];
NSData*data=[NSDatadataWithContentsOfURL:url];
dispatch_async(dispatch_get_main_queue(), ^{
//更新UI需要主线程
imageView.image= [UIImageimageWithData:data];
});
});
}
}
///*并发执行**/
//- (void)GCDClick {
//
//__weak typeof(self)weakSelf = self;
//dispatch_queue_t globalQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
//for (NSInteger i = 0 ; i < self.urlArr.count; i++) {
//UIImageView * imageView = [self.view viewWithTag:AddTag+i];
//imageView.image = nil;
//dispatch_async(globalQueue, ^{
//
//NSURL *url=[NSURL URLWithString:weakSelf.urlArr[i]];
//NSData *data=[NSData dataWithContentsOfURL:url];
//dispatch_async(dispatch_get_main_queue(), ^{
//
////更新UI需要主线程
//imageView.image = [UIImage imageWithData:data];
//});
//
//
//});
//
//}
//
//}
/****************** GCD结束******************/
@end
