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社区首页 >问答首页 >在iOS的icarousel中使用AsyncImageView时出现的问题

在iOS的icarousel中使用AsyncImageView时出现的问题
EN

Stack Overflow用户
提问于 2012-10-31 18:30:40
回答 4查看 2.1K关注 0票数 5

我已经开发了一个使用异步图像视图和iCarousel.But的应用程序我的问题是,当我试图从urls加载图像时,只有活动指示器在我的iCarousel的每个视图中加载,没有图像是loaded.Here是我的代码

代码语言:javascript
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  - (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(AsyncImageView *)view
 {
if (view == nil
 {
  AsyncImageView * view = [[[AsyncImageView alloc]initWithFrame:CGRectMake(0, 0, 300, 280)] autorelease];
view.image=[UIImage imageNamed:@"infobg.png"];
view.imageURL=[imageURLs objectAtIndex:index];
}
return view;
}
EN

回答 4

Stack Overflow用户

回答已采纳

发布于 2012-11-01 17:37:05

遵循以下步骤可能是因为以下原因,您可能会遇到此问题

--检查您的imageURL数组是否包含iCarousel下的对象是否为空您可能会遇到这种问题...

--执行数组分配并添加对象

代码语言:javascript
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 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 

方法,因为如果将对象添加到viewDidLoad下的数组中,它将不起作用,因为轮播视图在viewDidLoad方法之前先加载。

--如果您的数组元素在这些步骤之后仍然存在,请遵循以下代码。

代码语言:javascript
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- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(AsyncImageView *)view
{
view = [[[AsyncImageView alloc]initWithFrame:CGRectMake(0, 0, 300, 280)] autorelease];

view.image=[UIImage imageNamed:@"infobg.png"];
view.imageURL=[imageURLs objectAtIndex:index];

//NSLog(@"%@",imageURLs)//check imageURLs having object

if(view ==nil)
{
    [[AsyncImageLoader sharedLoader]cancelLoadingImagesForTarget:view];
}
return view;

}

它会帮助你..

票数 2
EN

Stack Overflow用户

发布于 2012-10-31 18:44:31

应该重用单元格

代码语言:javascript
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- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(AsyncImageView *)view

 {
if (view == nil) {
 view = [[[AsyncImageView alloc]initWithFrame:CGRectMake(0, 0, 300, 280)] autorelease];
}
// dont forget stop previous loading -cancelLoadingURL:target:

 view.image=[UIImage imageNamed:@"infobg.png"];
 view.imageURL=[imageURLs objectAtIndex:index];

 return view;
}

此外,您还应停止之前启动的

票数 2
EN

Stack Overflow用户

发布于 2013-09-20 22:37:40

代码语言:javascript
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- (void)viewDidLoad
{
    [super viewDidLoad];

    User_Id=@"abcd@gmail.com";

    NSString *Post=[NSString stringWithFormat:@"email=%@",User_Id];
    NSData *PostData = [Post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
    NSString *PostLengh=[NSString stringWithFormat:@"%d",[Post length]];
    NSURL *Url=[NSURL URLWithString:[NSString stringWithFormat:@"%@fetch_all_user_updates.php",ServerPath]];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:Url     cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    [request setHTTPMethod:@"POST"];
    [request setValue:PostLengh forHTTPHeaderField:@"Content-Lenght"];
    [request setHTTPBody:PostData];

    NSData *ReturnData =[NSURLConnection sendSynchronousRequest:request returningResponse:Nil error:Nil];
    NSString *Response = [[NSString alloc] initWithData:ReturnData encoding:NSUTF8StringEncoding];
    Response = [Response stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    NSMutableArray *JSON_Array=[Response JSONValue];

// NSlog(@"%@", JSON_Array);
// textfield.text=[[JSON_Array valueforKey:@"email"]objectAtIndex:0];
// load images from database at local host
/*
NSLog(@"%@",[NSString stringWithFormat:@"%@/Images/%@",serverScriptpath,[[jsonarray valueForKey:@"image"]objectAtIndex:0]]);
NSURL *img_url=[NSURL URLWithString:[NSString stringWithFormat:@"%@/Images/%@",
                                     serverScriptpath,[[jsonarray valueForKey:@"image"]objectAtIndex:0]]];

NSURLRequest *request1=[NSURLRequest requestWithURL:img_url];
[Img_profilepic setImageWithURLRequest:request1 placeholderImage:[UIImage imageNamed:@".png"] success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {

} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {

}];
*/


    if (JSON_Array>0)
    {
        Array_Image_Name=[JSON_Array valueForKey:@"image_name"];
        [Array_Image_Name retain];
    }
    else
    {
        UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"Failure" message:@"Error To Load Image" delegate:Nil cancelButtonTitle:@"OK" otherButtonTitles:Nil, nil];
        [Alert show];
        [Alert release];
    }
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return Array_Image_Name.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell;
    cell=nil;
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    AsyncImageView *Load_Image=[[AsyncImageView alloc]initWithFrame:CGRectMake(20, 10, 280, 100)];
    Load_Image.imageURL=[NSURL URLWithString:[NSString stringWithFormat:@"%@/Images/%@",ServerPath,[Array_Image_Name objectAtIndex:indexPath.row]]];
    Load_Image.showActivityIndicator=YES;
    [cell.contentView addSubview:Load_Image];
    return cell;
}
票数 1
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页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/13155874

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