我有一个表格视图,后面有一个图像视图。我试图弄清楚如何模糊桌面视图后面的图像,类似于打开控制中心时的外观。
以下是我的观点:
以下是代码:
#import "ToursAndConferencesViewController.h"
#import "RSSChannel.h"
#import "RSSItem.h"
#import "WebViewController.h"
#import "DTCustomColoredAccessory.h"
#import "SVProgressHUD.h"
@implementation ToursAndConferencesViewController
{
UIActivityIndicatorView *loadingIndicator;
}
@synthesize webViewController;
- (void)viewDidLoad
{
UIImageView *background = [[UIImageView alloc]init];
background.image = [UIImage imageNamed:@"plain_app-background.png"];
self.tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
[self.tableView setBackgroundView:background];
self.title = @"Tours & Conferences";
[[SVProgressHUD appearance]setHudBackgroundColor:[UIColor blackColor]];
[[SVProgressHUD appearance]setHudForegroundColor:[UIColor whiteColor]];
[SVProgressHUD showWithStatus:@"Loading"];
// [SVProgressHUD showWithStatus:@"Loading" maskType:SVProgressHUDMaskTypeGradient];
}
- (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;
UIImageView *image = [[UIImageView alloc]init];
image.image = [UIImage imageNamed:@"CellImage.png"];
UIImageView *background = [[UIImageView alloc]init];
background.image = [UIImage imageNamed:@"plain_app-background.png"];
UIImageView *highlightedCellImage = [[UIImageView alloc]init];
highlightedCellImage.image = [UIImage imageNamed:@"HighlightedCellImage"];
UIColor *kfbBlue = [UIColor colorWithRed:8.0/255.0f green:77.0/255.0f blue:139.0/255.0f alpha:1];
UIColor *kfbLightBlue = [UIColor colorWithRed:24.0/255.0f green:89.0/255.0f blue:147.0/255.0f alpha:1];
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]];
[[cell textLabel]setText:[item title]];
NSLog(@"Date: %@", [item date]);
tableView.backgroundColor = [UIColor clearColor];
[self.tableView setSeparatorColor:kfbBlue];
cell.textLabel.backgroundColor = [UIColor clearColor];
cell.textLabel.highlightedTextColor = kfbBlue;
cell.textLabel.font = [UIFont fontWithName:@"FranklinGothicStd-ExtraCond" size:20.0];
cell.textLabel.textColor = kfbLightBlue;
// cell.backgroundView = image;
cell.backgroundColor = [UIColor clearColor];
// cell.selectedBackgroundView = highlightedCellImage;
tableView.backgroundView = background;
DTCustomColoredAccessory *accessory = [DTCustomColoredAccessory accessoryWithColor:cell.textLabel.textColor];
accessory.highlightedColor = kfbBlue;
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://kyfbnewsroom.com/category/conferences/feed"];
// 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 - ignore the warning here for now
[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]];
// Construct a URL with the link string of the item
NSURL *url = [NSURL URLWithString:[entry link]];
// Construct a request object with that URL
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Load the request into the web view
[[webViewController webView]loadRequest:req];
webViewController.hackyURL = url;
// Set the title of the web view controller's navigation item
// [[webViewController navigationItem]setTitle:[entry title]];
}
@end
答案 0 :(得分:3)
将tableView设置为[UIColor clearColor]
;
然后download apple's UIImage+ImageEffects
类别文件包含帮助方法来模糊图像。
您可以在this tutorial上关注图像模糊的代码示例
这是我的最终结果,它是我的tableView背后的图像: