NSOperationQueue*queue=[[NSOperationQueue alloc]init];
@H_502_2@NSBlockOperation*blockOperation=[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];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
self.singleImageView.image=[UIImage imageWithData:data];
}];
}];
@H_502_2@NSBlockOperation*blockOperation1=[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];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
self.secondImageView.image=[UIImage imageWithData:data];
}];
}];
__weak __typeof__(self) weakSelf = self;
NSBlockOperation*blockOperation3=[NSBlockOperation blockOperationWithBlock:^{
@H_502_2@UIGraphicsBeginImageContext(self.bottomImageView.frame.size);
CGSize size= self.bottomImageView.frame.size;
[weakSelf.singleImageView.image drawInRect:CGRectMake(0,size.width/2,size.height)];
[weakSelf.secondImageView.image drawInRect:CGRectMake(size.width/2,size.height)];
UIImage *finalImage=UIGraphicsGetImageFromCurrentImageContext();
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
weakSelf.bottomImageView.image=finalImage;
}];
@H_502_2@UIGraphicsEndImageContext();
@H_502_2@}];
@H_502_2@ @H_502_2@[blockOperation3 addDependency:blockOperation1];
[blockOperation3 addDependency:blockOperation];
@H_502_2@@H_502_2@
[queue addOperation:blockOperation3];
[queue addOperation:blockOperation1];
[queue addOperation:blockOperation];
