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我正在尝试制作一个调查应用程序。一个滚动视图中有 20 个视图和许多 uitextview。当我尝试这样做时，该应用程序的运行速度非常慢。我认为我无法正确进行内存管理。你能帮我做对吗？非常感谢。这是我的代码：

 -(void)textViewBicimle: (UITextView *)textAlani{
[textAlani.layer setBorderColor:[[[UIColor blackColor] colorWithAlphaComponent:1.0] CGColor]];
[textAlani.layer setBorderWidth:1.0];
  }

  - (void) tableCiz:(NSMutableArray *)hucreler sutun:(int)sutunSayisi satir:     (int)satirSayisi{
 int z = 0;
 for (int i =0;i<satirSayisi;i++){
     for(int j=0;j<sutunSayisi&&z<satirSayisi*sutunSayisi;j++,z++){
         [self textViewBicimle:[hucreler objectAtIndex:z]];
         [[hucreler objectAtIndex:z] setFrame:CGRectMake((20+j*100), (20+i*40), 100, 40)];
     }
 }
 }

 -(void)hucreArrayOlustur: (int)sutunSayisi suankiView:(UIView *)soruViewIki satir:(int)satirSayisi{
for (int i = 0; i <sutunSayisi*satirSayisi; i++){
    self.textView = [[UITextView alloc]init];
    self.textView.text = @"dsgfdh";
    [self.hucreArray addObject:self.textView];
    [soruViewIki addSubview:self.textView];
    [self.textView release];
}
}

-(void)viewOlustur{
 for (int i = 0; i <soruAdedi; i++){
self.hucreArray = [[[NSMutableArray alloc]init]autorelease];
if (i == 0){
    self.soruView = [[UIView alloc]initWithFrame:CGRectMake(20, 20, 728, 0)];
    self.soruView.clipsToBounds = YES;
    self.soruView.backgroundColor = [UIColor lightGrayColor];
    [self hucreArrayOlustur:5 suankiView:self.soruView satir:10];
    [self tableCiz:self.hucreArray sutun:5 satir:10];
    CGRect frame = self.soruView.frame;
    CGRect frame2 = [[self.hucreArray objectAtIndex:49] frame];
    frame.size.height =  frame2.origin.y+frame2.size.height+34;
    self.soruView.frame = frame;
    [self.viewArray addObject:self.soruView];
    [scrollView addSubview:self.soruView];
    [self.soruView release];
}
else{
    CGRect frameGecici = [[self.viewArray objectAtIndex:i-1] frame];
    float geciciY = frameGecici.origin.y+frameGecici.size.height+1;
    self.soruView = [[UIView alloc]initWithFrame:CGRectMake(20, geciciY, 728, 0)];
    self.soruView.clipsToBounds = YES;
    self.soruView.backgroundColor = [UIColor lightGrayColor];
    [self hucreArrayOlustur:5 suankiView:self.soruView satir:10];
    [self tableCiz:self.hucreArray sutun:5 satir:10];
    CGRect frame = self.soruView.frame;
    CGRect frame2 = [[self.hucreArray objectAtIndex:49] frame];
    frame.size.height =  frame2.origin.y+frame2.size.height+34;
    self.soruView.frame = frame;
    [self.viewArray addObject:self.soruView];
    [scrollView addSubview:self.soruView];
    [self.soruView release];
}

}
}

- (void)viewDidLoad
{
[super viewDidLoad];
scrollView.contentSize = CGSizeMake(0, 10000);
self.viewArray = [[NSMutableArray alloc]init];
[self viewOlustur];
NSLog(@"%@",self.viewArray);
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
 [super didReceiveMemoryWarning];

 // Dispose of any resources that can be recreated.
}

 - (void)dealloc {
 [self.soruView release];
 [self.textView release];
 [scrollView release];
 [super dealloc];
 }

 - (void)viewDidUnload {
 [self setScrollView:nil];
 [super viewDidUnload];
  }
  @end
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2 回答 2

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UIScrollView 参考页面中的以下建议可能会有所帮助：

管理滚动视图中显示的内容绘制的对象应该平铺内容的子视图，这样视图就不会超过屏幕的大小。当用户在滚动视图中滚动时，此对象应根据需要添加和删除子视图。

因此，如果您的滚动视图中有一个大的调查视图，并且许多问题视图在调查视图中都有多个视图，那么您可以例如消除调查视图并仅在滚动视图的内容视图中布置可见问题.

于 2012-10-23T19:52:30.243 回答
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由于我们正在讨论内存管理，因此我想在这里更正一些事情，只是为了实现最佳内存管理实践。

你不应该使用，

self.textView = [[UITextView alloc]init];

而是将其用作，

self.textView = [[[UITextView alloc] init] autorelease];

并且不要[self.textView release];直接在属性上使用。如果你不使用 ARC，你可以在你的 dealloc 方法中加入下面的行，

self.textView = nil;

如果您可以将某些变量作为局部变量，则不需要将其用作属性。

代替，

self.soruView = [[UIView alloc]initWithFrame:CGRectMake(20, 20, 728, 0)];

也许您可以将其用作，

UIView *soruView = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 728, 0)];
//rest of the code here
[self.scrollView addSubview:soruView];
[soruview release];

如果您不需要同时使所有视图可见，您可以在用户滚动到该点时添加其余视图。这也应该有助于优化内存使用。

于 2012-10-23T23:16:22.180 回答