非同期仮完了

とりあえず画像の読み込みを非同期にするため、UIImageViewのサブクラスを作ってNSURLConnection使って画像をロードする。@implementationの直下に裸で大域変数置いたらインスタンス同士で書き換えるみたいでエラー出まくりでしかも非同期やからdealloc済みにアクセスしてますよーとか配列にそんなに数入ってないですよーとか毎回違うエラーが出てハマった。ちゃんと@interfaceで宣言しとけば大丈夫みたい。基本か。そうだろうな。

Photo.m

#import "Photo.h"
#define nwf(x) [NSNumber numberWithFloat:x]
#define ofv(x,y) [[x objectAtIndex:y]floatValue]

@implementation Photo

- (id)initWithFrame:(CGRect)frame photourl:(NSMutableArray *)cont;
{
    self = [super initWithFrame:frame];
    if (self) {
  photourl=[[NSArray alloc]initWithArray:cont];
  imgnum=0;
  multiFlg=NO;
  if([photourl count]>1){
   multiFlg=YES;
   imgArr=[[NSMutableArray alloc]initWithCapacity:0];
  }
  UIScreen *uis=[UIScreen mainScreen];
  sw=[uis bounds].size.width,sh=[uis bounds].size.height,sr=sw/sh;
    }
    return self;
}

-(void)loadPhoto{
 [self abort];
 if(!ai) ai=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
 [ai setCenter:self.center];[self addSubview:ai];[ai startAnimating];
 data=[[NSMutableData alloc]initWithCapacity:0];
 NSURLRequest *req=[NSURLRequest 
        requestWithURL:[NSURL URLWithString:[photourl objectAtIndex:imgnum]]
        cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
 conne=[[NSURLConnection alloc]initWithRequest:req delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
 [data setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)nsdata{
 [data appendData:nsdata];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
 [self abort];
 NSLog(@"error.");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
 if(multiFlg){
  UIImage *img=[UIImage imageWithData:data];
  [imgArr addObject:img];
  [imgArr addObject:nwf(img.size.width)];[imgArr addObject:nwf(img.size.height)];[imgArr addObject:nwf(img.size.width/img.size.height)];
  if([imgArr count]/4<[photourl count]){
   imgnum++;[self loadPhoto];
  }
  else{ //tiling routine
   int curw=0,curh=0,k=0;
   for(int j=0;j<[imgArr count]/4;j++){
    if([[imgArr objectAtIndex:j*4+3]floatValue]<sr&&[imgArr count]/4>j+1){
     int over3=2;
     float firstw=ofv(imgArr, j*4+1),firsth=ofv(imgArr, j*4+2),firstr=firsth/firstw;
     float nextw=ofv(imgArr, (j+1)*4+1),nexth=ofv(imgArr, (j+1)*4+2);
     float newh=firstr*((sw*nexth)/(nextw*firstr+nexth));
     while (sw/newh<sr&&[imgArr count]/4>j+over3) {
      nextw=ofv(imgArr, (j+over3)*4+1),nexth=ofv(imgArr, (j+over3)*4+2);
      newh=(newh/sw)*((sw*nexth)/(nextw*(newh/sw)+nexth));
      over3++;
     }
     j+=1+(over3-2);
     UIGraphicsBeginImageContext(CGSizeMake(sw,curh+newh));
     if(mixedimg){[mixedimg drawAtPoint:CGPointMake(0, 0)];}
     while(k<j+1){
      float neww=newh*[[imgArr objectAtIndex:k*4]size].width/[[imgArr objectAtIndex:k*4]size].height;
      [[imgArr objectAtIndex:k*4]drawInRect:(CGRectMake(curw, curh,neww,newh))];
      curw+=neww;k++;
     }
     curh+=newh;curw=0;
     mixedimg=UIGraphicsGetImageFromCurrentImageContext();
     UIGraphicsEndImageContext();
    }else{
     UIGraphicsBeginImageContext(CGSizeMake(sw,curh+sw*[[imgArr objectAtIndex:j*4]size].height/[[imgArr objectAtIndex:j*4]size].width));
     if(mixedimg){[mixedimg drawAtPoint:CGPointMake(0, 0)];}
     float newh=sw*[[imgArr objectAtIndex:j*4]size].height/[[imgArr objectAtIndex:j*4]size].width;
     [[imgArr objectAtIndex:j*4]drawInRect:(CGRectMake(0, curh, sw, newh))];
     mixedimg=UIGraphicsGetImageFromCurrentImageContext();
     UIGraphicsEndImageContext();
     curh+=sw*[[imgArr objectAtIndex:j*4]size].height/[[imgArr objectAtIndex:j*4]size].width;
    }
   }
   [ai removeFromSuperview];
   self.image=mixedimg;
   if(self.image.size.width/self.image.size.height<sw/sh)
    [self setFrame:CGRectMake((sw-sh*self.image.size.width/self.image.size.height)/2, 0, sh*self.image.size.width/self.image.size.height, sh)];
   else [self setFrame:CGRectMake(0, (sh-sw*self.image.size.height/self.image.size.width)/2, sw, sw*self.image.size.height/self.image.size.width)];
   [self abort];
  }
 }
 else{
  [ai removeFromSuperview];
  self.image=[UIImage imageWithData:data];
  if(self.image.size.width/self.image.size.height<sw/sh)
   [self setFrame:CGRectMake((sw-sh*self.image.size.width/self.image.size.height)/2, 0, sh*self.image.size.width/self.image.size.height, sh)];
  else [self setFrame:CGRectMake(0, (sh-sw*self.image.size.height/self.image.size.width)/2, sw, sw*self.image.size.height/self.image.size.width)];
  [self abort];
 }
}

できた。画像のURLが入った配列を引数にして初期化してやればちゃんと読む。複数でも大丈夫。あとはanimatedなgifをどう扱うか。imageIO? UIWebView?ちょっと調べる。

昨日の昼は十六番＠長堀橋で十六番ラーメンセット。スープはかなり美味しいが、麺はどうだろう。尾道ラーメンって全部あんな感じなんかな。日清カップヌードル的な、って言ったら怒られるか。でもまた行きたい。
尾道ラーメン 十六番