將UIImageView數組對象添加到NSMutableArray

Question

我在向NSMutableArray添加或訪問UIImageView對象時遇到麻煩。

NSMutableArray *imageViewArray = [[NSMutableArray alloc] init];

for(int i=0;i<(imageStringArray.count);i++){
        [imageViewArray addObject:ImgArray[i]];
}

ImgArray [x]充滿了來自URL的14張圖像。 我或者得到了exc_bad_access代碼1或一個斷點。

我想要這樣做的原因是在后台線程中從Web獲取圖像數組，並在主線程中設置UI圖像。

編輯：

另外，我要執行此操作的原因是異步獲取和顯示URL中的圖像。

這是我的代碼，但我不知道如何將其轉換為異步方法。

-(void)getSlideshow{

    [self populateStringArray];
    NSString *prefix = @"http://newsongbismarck.com/images/announcements/";
    NSString *suffix = @".jpg";

    //NSUInteger count = [imageStringArray count];
    //get this from the website for now
    int number = (int)[imageStringArray count];
    int PageCount = number;

    //Setup scroll view
    UIScrollView *Scroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 265, 320, 200)];
    Scroller.backgroundColor = [UIColor clearColor];
    Scroller.pagingEnabled = YES;
    Scroller.contentSize = CGSizeMake(PageCount * Scroller.bounds.size.width, Scroller.bounds.size.height);

    //Setup Each View Size
    CGRect ViewSize = Scroller.bounds;


    int x = PageCount;
    int numb = 0;

    UIImageView *ImgArray[PageCount];


    while(x!=0){
        ImgArray[numb] = [[UIImageView alloc] initWithFrame:ViewSize];
        [ImgArray[numb] setImage:[self getSlideshowImages:[[prefix stringByAppendingString:imageStringArray[numb]]stringByAppendingString:suffix]]];
        //[Scroller addSubview:ImgArray[numb]];

        //Offset View Size
        ViewSize = CGRectOffset(ViewSize, Scroller.bounds.size.width, 0);

        x--;
        numb++;
    }

    int integer = (int)[imageStringArray count];
    imageViewArray = [[NSMutableArray alloc] initWithCapacity:integer];

    /*int x2 = PageCount;
    int numb2 = 0;

    while(x2!=0){

        [imageViewArray addObject:ImgArray[numb2]];
        NSLog(@"ImageView added to array");
        x2--;
        numb2++;
    }
*/

    CGRect newViewSize = Scroller.bounds;
    int NumberOfImages = 21;
    int i;
    for(i=0;i<NumberOfImages;i++){

        if(i == 0){
            //Setup first picture
            UIImageView *ImgView = [[UIImageView alloc] initWithFrame:newViewSize];
            NSString *FilePath = [NSString stringWithFormat:@"Page_%d.png", i];
            [ImgView setImage:[UIImage imageNamed:FilePath]];
            [Scroller addSubview:ImgView];
        }else{
            //Setup the rest of the pictures
            newViewSize = CGRectOffset(ViewSize, Scroller.bounds.size.width, 0);
            UIImageView *ImgView = [[UIImageView alloc] initWithFrame:newViewSize];
            NSString *FilePath = [NSString stringWithFormat:@"Page_%d.png", i];
            [ImgView setImage:[UIImage imageNamed:FilePath]];
            [Scroller addSubview:ImgView];
        }
    }

[self.view addSubview:Scroller];

}

如果我不嘗試使其異步，那一切都可以

Answer 1

你為什么不使用

 - (void)addObjectsFromArray:(NSArray *)otherArray

？