您好我有标签问题，即我有一个XML NewsViewController，我正在显示新闻。你可以看到屏幕截图（NewsViewController.jpg）在NewsViewController我显示的是Tittle，Date和Description标签，那些标签隐藏在imageView单元格后面但是在少数新闻列表中显示正常。可以任何人帮我吗?? / p>
下面我给出了NewsViewController代码，请检查
这是我的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
下面我给出了屏幕截图
NewsViewController Link此处
DetailsViewController Link此处
答案 0 :(得分：0)
这里有两个问题。我会回答关于tableview的问题。
SDWebImage上的UIImageView类别（UIImageView+WebCache）是异步API，因此当您确定是否有图像并排列文本框架时，它总是评估为否< / p>
[cell.imgNews setImageWithURL:[NSURL URLWithString:[self.arrImages objectAtIndex:indexPath.row]] placeholderImage:[UIImage imageNamed:@""]];
...
if (!cell.imgNews.image)
{
//setup text frame
}
你所说的是一种方便的方法......
- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options progress:(SDWebImageDownloaderProgressBlock)progressBlock completed:(SDWebImageCompletedBlock)completedBlock;
所以试试这个......
[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
}
}];
答案 1 :(得分：0)
请查看您的InterfaceBuilder截图2和3.
大图像（3）设置了自动调整遮罩，以便保持右边距。 ＃ 看起来像这样
_ | _
除了UITableViewCell中的小图像之外，标签仅保留顶部和左边的边距。设置为保持在右侧，它不会再溢出。 让它看起来像上面的面具。
当然，您必须为所有3个标签执行此操作。或者，你可以在视图中包装3个标签，只为这个容器做自动调整遮罩的东西，并使标签填满容器的整个宽度。
答案 2 :(得分：0)
我将在＆＃34; NewsViewController＆＃34;中回答有关单元格的问题。
使用[UIImage imageNamed:@""]相当于传递nil。 UIImage类将找不到名称为空字符串的图像，因此它将返回nil。
当您检查cell.imgNews的图片时，它将是nil，因为尚未加载真实图片。
您有两种选择：
1-使用占位符图像。
2-检查图像URL而不是图像本身。比如if (![self.arrImages objectAtIndex:indexPath.row])。
注意：确保数据数组具有相同的长度。如果其中一个长度不同，则会超出范围。解决此问题的一种方法是使用包含所有相关信息的自定义类。然后构建一个数组。