UILabels隐藏在“图像视图”单元的后面吗？

Question

Hi I have issue with Labels ,ie , I have a XML NewsViewController where i am displaying the News . You can see the Screen shot (NewsViewController.jpg) In NewsViewController i am displaying the Tittle, Date and Description labels , those labels are hiding behind the imageView cell But in the Few News List are displaying fine .Can any one Help me ??

Below i have given the NewsViewController code please check

Here is my NewsViewController.m

#import "NewsViewController.h"
#import "NewsTableViewCell.h"
#import "NewDetailsViewController.h"
#import <SDWebImage/UIImageView+WebCache.h>
@interface NewsViewController ()
{
    NSString *temString;
    NSMutableString *strTemp;
    BOOL isDateSearch;
}

@end

@implementation NewsViewController
@synthesize arrImages;
@synthesize TittleOne;
@synthesize TittleTwo;
@synthesize TittleThree;
@synthesize datepicker;
@synthesize PickerContainer;
@synthesize datepickerTittle;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

#pragma mark - View Life Cycle
- (void)viewDidLoad
{

    [super viewDidLoad];
    [TittleOne setFont: [UIFont fontWithName:@"GEEast-ExtraBold" size:12]];
    [TittleTwo setFont: [UIFont fontWithName:@"GEEast-ExtraBold" size:10]];
    [TittleThree setFont: [UIFont fontWithName:@"GEEast-ExtraBold" size:10]];
    // [[UIColor redColor] set];
    [datepickerTittle setFont:[UIFont fontWithName:@"GEEast-ExtraBold" size:12]];
    // [datepickerTittle.textColor= [UIColor yellowColor]];

    isDateSearch=NO;
    self.arrTitles =[[NSMutableArray alloc] init];
    self.arrDescription=[[NSMutableArray alloc]init];
    self.arrImages=[[NSMutableArray alloc]init];
    self.arrDate=[[NSMutableArray alloc]init];
    self.arrUrls=[[NSMutableArray alloc]init];
    self.arrDateSearch=[[NSMutableArray alloc]init];
    //[self performSelectorInBackground:@selector(requestingForNews:) withObject:nil];

    // dispatch_async( dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), s^{
    self.spinnerView.hidden=YES;
    [self makeRequestForNews];
    //  self.spinnerView.stopAnimating;
    //});

    // Do any additional setup after loading the view.
    [self imagedownloader:@"http://www.shura.bh/MediaCenter/News/"];
}
-(void)requestingForNews:(id)sender
{
    [self makeRequestForNews];
}
-(void) imagedownloader : (NSString *)urlStringOfImage
{
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
    dispatch_async(queue, ^{
        //downlaod image
        NSURL *imageUrl = [NSURL URLWithString:urlStringOfImage];
        NSData  *imageData = [NSData dataWithContentsOfURL:imageUrl];
        UIImage *image = [UIImage imageWithData:imageData];
        dispatch_async(dispatch_get_main_queue(), ^{

            UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 50, 50 )];
            imageView.image = image;
            [self.view addSubview:imageView];
        });
    });
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma  mark - make request for news
-(void)makeRequestForNews
{

    NSURL *url =[NSURL URLWithString:self.strNewsApi];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    //After making request the apparent thing is expecting the response that may be expected response or an Error. so create those objects and intialize them with NULL.
    NSURLResponse *response = NULL;
    NSError *requestError =NULL;
    //Once you have response with you , Capture YOur Responce data using NsData.

    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&requestError];

    //Convert the respnse Data into Response String.

    NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

    //Now We can start parsing the Data using XMl parser . you need XML parser in-order to use the below class method "dictionaryFOrXMLString".

    NSError *parserError = NULL;

    //XML parsing

    NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:responseData];
    [xmlParser setDelegate:self];
    [xmlParser parse];

    //    NSURL *url = [NSURL URLWithString:url];
    //    NSData *data = [NSData dataWithContentsOfURL:url];
    //    UIImage *image = [UIImage imageWithData:data];

    //NSDictionary *xmlDict = [XMLReader dictionaryForXMLString:responseString error:NULL];

    //once you have xmlDict handy, you can pass this to the any ViewController (Like table view) to populate the Data.
}

- (void)parserDidEndDocument:(NSXMLParser *)parser {

}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{


    if ([elementName isEqualToString:@"ShuraNews"])
    {

    }
    if ([elementName isEqualToString:@"PUBLISHINGPAGEIMAGE"])
    {

    }
    strTemp=[NSMutableString new];
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    //temString =string;
    [strTemp appendString:string];
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if ([elementName isEqualToString:@"TITLE"])
    {
        NSLog(@"temstring=== %@", strTemp);
        [self.arrTitles addObject:strTemp];
    }
    if ([elementName isEqualToString:@"PUBLISHINGPAGECONTENT"])
    {
        NSLog(@"temstring=== %@", strTemp);
        [self.arrDescription addObject:strTemp];
    }
    if ([elementName isEqualToString:@"NEWSARTICLEDATE"])
    {
        NSLog(@"temstring=== %@", strTemp);
        [self.arrDate addObject:strTemp];
    }
    if ([elementName isEqualToString:@"PUBLISHINGPAGEIMAGE"])
    {

        NSLog(@"temstring=== %@", strTemp);
        [self.arrImages addObject:strTemp];
    }
    if ([elementName isEqualToString:@"ShuraNews"])
    {
        [self.tblNews reloadData];
        // self.spinnerView.hidden=YES;
    }
    if ([elementName isEqualToString:@"URL"])
    {
        [self.arrUrls addObject:strTemp];
    }

}

#pragma mark - TabeView Datasource//delegate method

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

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (isDateSearch)
    {
        return [self.arrDateSearch count];
    }
    else{
        return [self.arrTitles count];
    }
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView setSeparatorInset:UIEdgeInsetsZero];
    static NSString *cellIdentifier=@"cellNews";
    NewsTableViewCell *cell=(NewsTableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];

    if (cell == nil)
    {
        cell = [[NewsTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
        // cell.NewsTableViewCell.textColor = UIColorFromRGB(0x000000);
        cell.backgroundColor=[UIColor clearColor];


    }

    if( [indexPath row] % 2){
        cell.contentView.backgroundColor =UIColorFromRGB(0Xffffff);

    }
    else{
        cell.contentView.backgroundColor =UIColorFromRGB (0Xdcdcdc);
    }

    //selectbackground color start
    UIView *NewsTableViewCell = [[UIView alloc] initWithFrame:cell.frame];
    NewsTableViewCell.backgroundColor = UIColorFromRGB(0Xdcdcdc);
    cell.selectedBackgroundView = NewsTableViewCell; //select background colro end
    cell.lblTitles.font = [UIFont fontWithName:@"GEEast-ExtraBold" size:12];
    if (isDateSearch)
    {
        cell.lblTitles.text=[[self.arrDateSearch objectAtIndex:indexPath.row]objectForKey:@"title"];
    }
    else{
        cell.lblTitles.text=[self.arrTitles objectAtIndex:indexPath.row];
    }
    cell.lblDescription.font =[UIFont fontWithName:@"GE SS Unique" size:12];
    cell.lblDate.font=[UIFont fontWithName:@"GE SS Unique" size:12];
    if (isDateSearch)
    {
        cell.lblDescription.text=[[self.arrDateSearch objectAtIndex:indexPath.row]objectForKey:@"des"];
    }
    else{
        cell.lblDescription.text=[self.arrDescription objectAtIndex:indexPath.row];
    }
    cell.lblDate.text=[self.arrDate objectAtIndex:indexPath.row];
    cell.lblTitles.textAlignment= NSTextAlignmentRight;
    cell.lblDate.textAlignment = NSTextAlignmentRight;
    cell.lblDescription.textAlignment = NSTextAlignmentRight;
    //SDWebImage Code for lazy loader
    [cell.imgNews setImageWithURL:[NSURL URLWithString:[self.arrImages objectAtIndex:indexPath.row]] placeholderImage:[UIImage imageNamed:@""]];
    // cell.imgNews.image=[UIImage imageWithData:data];
    cell.imgNews.layer.borderColor = [UIColor blackColor].CGColor;
    cell.imgNews.layer.borderWidth = 2.0;
    [PickerContainer setHidden:YES];
    if (!cell.imgNews.image)
    {
        cell.lblTitles.frame=CGRectMake(cell.lblTitles.frame.origin.x, cell.lblTitles.frame.origin.y, 283, cell.lblTitles.frame.size.height);
        cell.lblDate.frame=CGRectMake(cell.lblDate.frame.origin.x, cell.lblDate.frame.origin.y, 286, cell.lblDate.frame.size.height);
        cell.lblDescription.frame=CGRectMake(cell.lblDescription.frame.origin.x, cell.lblDescription.frame.origin.y, 281, cell.lblDescription.frame.size.height);
        cell.imgNews.layer.borderColor = [UIColor blackColor].CGColor;
        cell.imgNews.layer.borderWidth = 0;
    }
    return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSDictionary *dict=nil;
    if (isDateSearch)
    {
        //dict=[[NSDictionary alloc]initWithObjectsAndKeys:[NSString stringWithFormat:@"%@",[[self.arrDateSearch objectAtIndex:indexPath.row]objectForKey:@"title"]],@"title",[NSString stringWithFormat:@"%@",[[self.arrDateSearch objectAtIndex:indexPath.row]objectForKey:@"des"]],@"img",[NSString stringWithFormat:@"%@",[self.arrDescription objectAtIndex:indexPath.row]],@"Des",[NSString stringWithFormat:@"%@",[self.arrUrls objectAtIndex:indexPath.row]],@"url", nil];
    }
    else{
        dict=[[NSDictionary alloc]initWithObjectsAndKeys:[NSString stringWithFormat:@"%@",
                                                          [self.arrTitles objectAtIndex:indexPath.row]],@"title",[NSString stringWithFormat:@"%@",
                                                                                                                  [self.arrImages objectAtIndex:indexPath.row]],@"img",[NSString stringWithFormat:@"%@",
                                                                                                                                                                        [self.arrDescription objectAtIndex:indexPath.row]],@"Des",[NSString stringWithFormat:@"%@",[self.arrUrls objectAtIndex:indexPath.row]],@"url", nil];
    }
    [self performSegueWithIdentifier:@"NewsDetailsID" sender:dict];
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"NewsDetailsID"])
    {
        ((NewDetailsViewController *)segue.destinationViewController).strTitle=[sender objectForKey:@"title"];
        ((NewDetailsViewController *)segue.destinationViewController).strDetailImage=[sender objectForKey:@"img"];
        ((NewDetailsViewController *)segue.destinationViewController).strDescription=[sender objectForKey:@"Des"];//strUrl
        ((NewDetailsViewController *)segue.destinationViewController).strUrl=[sender objectForKey:@"url"];
    }
}

- (IBAction)backBtnClicked:(id)sender {
    [self.navigationController popViewControllerAnimated:YES];
}

- (IBAction)DatePickerBt:(id)sender {
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    PickerContainer.frame = CGRectMake(0, 150, 320, 261);
    [PickerContainer setHidden:NO];
}
- (IBAction)HideButton:(id)sender
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    PickerContainer.frame = CGRectMake(0,600, 320, 261);
    [UIView commitAnimations];

    if ([self.arrDateSearch count])
    {
        [self.arrDateSearch removeAllObjects];
    }
    if ([self.arrDate count])
    {
        for (int i=0; i<[self.arrDate count]; i++)
        {
            NSLog(@"arrdate === %@",self.arrDate);

            NSArray *arrDateStr=[[self.arrDate objectAtIndex:i] componentsSeparatedByString:@" "];
            NSArray *arrDat=[[NSString stringWithFormat:@"%@",[arrDateStr objectAtIndex:0]] componentsSeparatedByString:@"/"];

            NSString *strDat=[NSString stringWithFormat:@"%@-%@-%@",[arrDat objectAtIndex:2],[arrDat objectAtIndex:1],[arrDat objectAtIndex:0]];
            NSString *strPicDat=[[[NSString stringWithFormat:@"%@",self.datepicker.date]componentsSeparatedByString:@" "]objectAtIndex:0];
            NSLog(@" strpic date === %@",strPicDat);
            if ([strDat isEqualToString:strPicDat])
            {
                isDateSearch=YES;
                NSDictionary *dictTemp=[NSDictionary dictionaryWithObjectsAndKeys:[self.arrTitles objectAtIndex:i],@"title",[self.arrDescription objectAtIndex:i],@"des",[self.arrImages objectAtIndex:i],@"img", nil];
                [self.arrDateSearch addObject:dictTemp];
                NSLog(@"dates equal");
            }

        }

        [self.tblNews reloadData];

    }
}
- (IBAction)ReloadButton:(id)sender {


}
@end

Below i have given the Screen shots

NewsViewController Link Here

DetailsViewController Link here

Answer 1

There are two questions here. Ill answer the one about the tableview.

The SDWebImage category on UIImageView ( UIImageView+WebCache ) is an async API , hence when you work out whether there is an image there and arrange your text frame it always evaluates to NO

[cell.imgNews setImageWithURL:[NSURL URLWithString:[self.arrImages objectAtIndex:indexPath.row]] placeholderImage:[UIImage imageNamed:@""]];
...
if (!cell.imgNews.image)
{
    //setup text frame
}

what you are calling is a convenience method for this...

- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options progress:(SDWebImageDownloaderProgressBlock)progressBlock completed:(SDWebImageCompletedBlock)completedBlock;

so try this...

[cell.imgNews setImageWithURL:[NSURL URLWithString:[self.arrImages objectAtIndex:indexPath.row]] 
placeholderImage:[UIImage imageNamed:@""] 
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {
    ...
    if (image) {
    //setup text frame for image
    }
    else {
   //setup text for no image as cell is recycled and may have held image previously
    }

}];

Answer 2

Please view your InterfaceBuilder Screenshots 2 and 3.

The Large image (3) has the autoresizing mask set so that the margin to the right is maintained. # It looks like this

_ | _

The Label besides the small image in the UITableViewCell however only mainains the margins to the top and the left. Set to keep it on the right as well and it won't overflow anymore. Make it look like the mask above.

Of course you'd have to do this for all 3 labels. Alternatvively you could wrap the 3 labels in a view and only do the autoresizing mask stuff for this container and make the labels fill out the entire width of the container.

Answer 3

I will answer the question regarding the cells in "NewsViewController". Using [UIImage imageNamed:@""] is equivalent to passing nil . UIImage class will not find an image with a name of empty string, so it will return nil . When you check cell.imgNews 's image, it will be nil as the real image is still not loaded yet.

You have two options: 1- Use a placeholder image. 2- Check for the image url instead of the image itself. like if (![self.arrImages objectAtIndex:indexPath.row]) .

Note: Make sure the data arrays have the same length. If one of them has different length, you will get out of bounds exception. One way of solving this is using a custom class that hold all related information. Then build an array of it.