1
我有一个UITableView，我试图给出一个清晰的背景来显示背景中的ImageView，但背景是白色的，我不知道为什么。UITableView具有白色背景而不是清晰
这里是我的代码：
#import "GRSYouTubeFeed.h"
#import "RSSChannel.h"
#import "RSSItem.h"
#import "WebViewController.h"
#import "DTCustomColoredAccessory.h"
#import "SVProgressHUD.h"
#import "TWTSideMenuViewController.h"
#import "UIImage+ImageEffects.h"
@implementation GRSYouTubeFeed
{
UIActivityIndicatorView *loadingIndicator;
}
@synthesize webViewController;
- (void)viewDidLoad
{
UIImage *normalBackground = [UIImage imageNamed:@"MenuBackground.png"];
UIImage *effectImage = [normalBackground applyDarkEffect];
UIImageView *blurredBackground = [[UIImageView alloc]init];
blurredBackground.image = effectImage;
UIBarButtonItem *openItem = [[UIBarButtonItem alloc] initWithTitle:@"Menu" style:UIBarButtonItemStylePlain target:self action:@selector(openButtonPressed)];
self.navigationItem.leftBarButtonItem = openItem;
self.tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
self.tableView.backgroundColor = [UIColor clearColor];
[self.tableView setBackgroundView:blurredBackground];
self.title = @"YouTube";
UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeRight:)];
swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRecognizer];
[[SVProgressHUD appearance]setHudBackgroundColor:[UIColor whiteColor]];
[[SVProgressHUD appearance]setHudForegroundColor:[UIColor blackColor]];
[SVProgressHUD showWithStatus:@"Loading"];
// [SVProgressHUD showWithStatus:@"Loading" maskType:SVProgressHUDMaskTypeGradient];
}
- (IBAction)swipeRight:(UIGestureRecognizer *)sender
{
[self.sideMenuViewController openMenuAnimated:YES completion:nil];
}
- (void)openButtonPressed
{
[self.sideMenuViewController openMenuAnimated:YES completion:nil];
}
- (void)viewDidDisappear:(BOOL)animated
{
[SVProgressHUD dismiss];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
NSLog(@"%@ found a %@ element", self, elementName);
if ([elementName isEqual:@"channel"])
{
// If the parser saw a channel, create new instance, store in our ivar
channel = [[RSSChannel alloc]init];
// Give the channel object a pointer back to ourselves for later
[channel setParentParserDelegate:self];
// Set the parser's delegate to the channel object
[parser setDelegate:channel];
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// return 0;
NSLog(@"channel items %d", [[channel items]count]);
return [[channel items]count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 50;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// return nil;
UIImage *normalBackground = [UIImage imageNamed:@"MenuBackground.png"];
UIImage *effectImage = [normalBackground applyDarkEffect];
UIImageView *blurredBackground = [[UIImageView alloc]init];
blurredBackground.image = effectImage;
tableView.backgroundView = blurredBackground;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell"];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"UITableViewCell"];
cell.textLabel.font=[UIFont systemFontOfSize:16.0];
}
RSSItem *item = [[channel items]objectAtIndex:[indexPath row]];
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"EEE, dd MMM yyyy HH:mm:ssZ"];
NSDate *pubDate = [formatter dateFromString:[item date]];
[formatter setDateStyle:NSDateFormatterMediumStyle];
NSString *dateString = [formatter stringFromDate:pubDate];
NSLog(@"Date String: %@", dateString);
[[cell textLabel]setText:[item title]];
NSLog(@"Date: %@", [item date]);
tableView.backgroundColor = [UIColor clearColor];
cell.textLabel.backgroundColor = [UIColor clearColor];
cell.textLabel.textColor = [UIColor whiteColor];
DTCustomColoredAccessory *accessory = [DTCustomColoredAccessory accessoryWithColor:cell.textLabel.textColor];
cell.accessoryView =accessory;
return cell;
}
- (void)fetchEntries
{
// Create a new data container for the stuff that comes back from the service
xmlData = [[NSMutableData alloc]init];
// Construct a URL that will ask the service for what you want -
// note we can concatenate literal strings together on multiple lines in this way - this results in a single NSString instance
NSURL *url = [NSURL URLWithString:@"http://gdata.youtube.com/feeds/base/users/LittleHeartRecords/uploads?alt=rss&v=2&orderby=published&client=ytapi-youtube-profile"];
// Put that URL into an NSURLRequest
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Create a connection that will exchange this request for data from the URL
connection = [[NSURLConnection alloc]initWithRequest:req delegate:self startImmediately:YES];
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self)
{
[self fetchEntries];
}
return self;
}
// This method will be called several times as the data arrives
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
// Add the incoming chunk of data to the container we are keeping
// The data always comes in the correct order
[xmlData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn
{
/* We are just checking to make sure we are getting the XML
NSString *xmlCheck = [[NSString alloc]initWithData:xmlData encoding:NSUTF8StringEncoding];
NSLog(@"xmlCheck = %@", xmlCheck);*/
// [loadingIndicator stopAnimating];
[SVProgressHUD dismiss];
// Create the parser object with the data received from the web service
NSXMLParser *parser = [[NSXMLParser alloc]initWithData:xmlData];
// Give it a delegate
[parser setDelegate:self];
//Tell it to start parsing - the document will be parsed and the delegate of NSXMLParser will get all of its delegate messages sent to it before this line finishes execution - it is blocking
[parser parse];
// Get rid of the XML data as we no longer need it
xmlData = nil;
// Reload the table.. for now, the table will be empty
[[self tableView]reloadData];
NSLog(@"%@\n %@\n %@\n", channel, [channel title], [channel infoString]);
}
- (void)connection:(NSURLConnection *)conn didFailWithError:(NSError *)error
{
// Release the connection object, we're done with it
connection = nil;
// Release the xmlData object, we're done with it
xmlData = nil;
[SVProgressHUD dismiss];
// Grab the description of the error object passed to us
NSString *errorString = [NSString stringWithFormat:@"Fetch failed: %@", [error localizedDescription]];
// Create and show an alert view with this error displayed
UIAlertView *av = [[UIAlertView alloc]initWithTitle:@"Error" message:errorString delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[av show];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[[webViewController webView]loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"about:blank"]]];
// Push the web view controller onto the navigation stack - this implicitly creates the web view controller's view the first time through
// [[self navigationController]pushViewController:webViewController animated:YES];
[self.navigationController pushViewController:webViewController animated:YES];
// Grab the selected item
RSSItem *entry = [[channel items]objectAtIndex:[indexPath row]];
NSLog(@"Channel Items: %@", [[channel items]objectAtIndex:[indexPath row]]);
// Construct a URL with the link string of the item
NSURL *url = [NSURL URLWithString:[entry link]];
NSLog(@"Link: %@", [entry link]);
// Construct a request object with that URL
NSURLRequest *req = [NSURLRequest requestWithURL:url];
NSLog(@"URL: %@", url);
// Load the request into the web view
[[webViewController webView]loadRequest:req];
webViewController.hackyURL = url;
NSLog(@"Request: %@", req);
NSLog(@"Title: %@", [entry title]);
NSLog(@"Pub Date: %@", [entry date]);
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
@end
这是我的结果：
我编辑了我的答案告诉你如何删除分隔符以及incase那些将是一个问题 –
谢谢。我已经知道如何做到这一切。我只是忘了让单元格背景清晰，并忽略它。 – raginggoat