UIButtonイメージでレイジーローディングを使用する方法は？

Question

私はこのロジックを使用してスクロールビューでボタンを作成します。 `int m = 0; int j = [イメージデータ数]/3; int s = [イメージデータ数]％3; if（s == 1 || s == 2） { j = j + 1; } scrollView.contentSize = CGSizeMake（320、j * 155）;あなたはuはレイジーローディングのためのロジックを持ってすることができ、この1からhere

で怠惰な負荷に希望をDemocodeを見つけることができ

int i,k,x=0,y=0; 
    for(i=0;i<j;i++) 
    { 
     if(s==0){ 
      for(k=0;k<3;k++) 
      { 
       button = [UIButton buttonWithType:UIButtonTypeCustom];   
       [button setFrame:CGRectMake(13+x,10+y, 91,135)]; 
       int p; 
       NSLog(@"%i",p++); 
       [button setTag:m]; 
       [button setBackgroundColor:[UIColor whiteColor]]; 
       NSData *imagesubCategoryData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:[imageData objectAtIndex:m]]]; 
       [button setImage:[UIImage imageWithData:imagesubCategoryData] forState:UIControlStateNormal]; 
       [button addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchUpInside]; 
       [scrollView addSubview:button]; 
       x=x+101; 
       m++; 
      } 
     } 
     else if(s==1) 
     { 
      for(k=0;k<3;k++) 
      { 
       button = [UIButton buttonWithType:UIButtonTypeCustom]; 

       [button setFrame:CGRectMake(13+x,10+y, 91,135)]; 
       [button setTitle:@"Button" forState:UIControlStateNormal]; 
       int p; 
       NSLog(@"%i",p++); 
       [button setTag:m]; 
       [button setBackgroundColor:[UIColor whiteColor]]; 
       NSData *imagesubCategoryData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:[imageData objectAtIndex:m]]]; 
       [button setImage:[UIImage imageWithData:imagesubCategoryData] forState:UIControlStateNormal]; 
       [button addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchUpInside]; 
       [scrollView addSubview:button]; 
       x=x+101; 
       if(i==j-1 && k==0) 
       { 
        break; 
       } 
       m++; 
      } 
     } 
     else if(s==2) 
     { 
      for(k=0;k<3;k++) 
      { 

       button = [UIButton buttonWithType:UIButtonTypeCustom];; 
       [button setFrame:CGRectMake(13+x,10+y, 91,135)]; 
       [button setTitle:@"Button" forState:UIControlStateNormal]; 
       int p; 
       NSLog(@"%i",p++); 
       [button setTag:m]; 
       [button setBackgroundColor:[UIColor whiteColor]]; 
       NSData *imagesubCategoryData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:[imageData objectAtIndex:m]]]; 
       [button setImage:[UIImage imageWithData:imagesubCategoryData] forState:UIControlStateNormal]; 
       [button addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchUpInside]; 
       [scrollView addSubview:button]; 
       x=x+101; 
       if(i==j-1 && k==1) 
       { 
        break; 
       } 
       m++; 
      } 
     } 

     x=0; 
     y=y+145; 
    } 

`

Answer 1

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