I have HTML I am generating in my app. I know it's valid because I ran it through W3Schools "edit and try it". It performs exactly as I designed it.
Here is the definition of the website in the header file:
#interface ReportViewController : UIViewController <UIWebViewDelegate> {
IBOutlet UIWebView *reportWebView;
}
#property (nonatomic, retain) UIWebView *reportWebView;
#property (nonatomic, retain) NSMutableString *html;
- (void) generateReport;
- (void) Alert: (NSString *) title andData: (NSString *) errorMsg;
#end
Here is where I finish creating the HTML and try to display it:
// now do the table
[html appendString:#"<div><table border class=\"boldtable\">"
"<tr BGCOLOR=\"ADDAFE\">"
"<th>STA </th><th>BS </th><th>HI </th><th>FS </th><th>ELEV </th><th>Desc</th>"
"</tr><p>"];
}
// finally, end the table, etc.
[html appendString:#"</table></div></body></html>"];
// UIWebView *reportWebView = [[UIWebView alloc] init];
//[reportWebView loadHTMLString: html baseURL:nil];
[self.reportWebView loadHTMLString:html baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];
}
As you can see, I have tried several different variations of displaying the HTML string. What is the correct way to do this?
Iulius Caesar Jacques Cousteau gave the correct answer in a comment:
reportWebView is an IBOutlet, indicating that it's created in an xib. Is the outlet connected? Is the nib loaded? What's with the commented-out UIWebView *reportWebView = [[UIWebView alloc] init];? Is this your exact code? Are you creating a local variable reportWebView that's shadowing the ivar?
but never came back to set it, therefore I am answering it for him.
Related
I have an array (_websites) which returns 2 results (i can see the records using NSLog).
What I am trying to do is to display those 2 records in NSTableView that has 3 columns. I make numerous attempts to bind the content of my array with the NSArrayController, without any success.
Here is the .h file
#import <Cocoa/Cocoa.h>
#import "AppDelegate.h"
#interface CombinedViewController : NSViewController <NSTableViewDataSource>
#property (nonatomic,strong) NSManagedObjectContext *mObjContext;
#property AppDelegate *appDelegate;
#property (strong) IBOutlet NSArrayController *combinedRecordsArrayController;
#property (nonatomic,strong)NSArray *websites;
#property (weak) IBOutlet NSTableView *tableView;
#end
the .m file code:
#import "CombinedViewController.h"
#import "Website.h"
#import "Customer.h"
#import "Hosting.h"
#interface CombinedViewController ()
#end
#implementation CombinedViewController
- (void)viewDidLoad {
[super viewDidLoad];
_appDelegate = (AppDelegate*)[[NSApplication sharedApplication] delegate];
self.mObjContext = _appDelegate.managedObjectContext;
[self getCombinedResutls];
}
-(NSArray *)getCombinedResutls {
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Website" inManagedObjectContext:self.mObjContext];
[fetchRequest setEntity:entity];
NSError *error = nil;
NSArray *fetchedObjects = [self.mObjContext executeFetchRequest:fetchRequest error:&error];
if (fetchedObjects == nil) {
NSLog(#"Error:%#",error);
}
_websites = [_mObjContext executeFetchRequest:fetchRequest error:nil];
for (Website *ws in _websites) {
Customer *cust = ws.customerInfo;
Hosting *host = ws.hostingInfo;
NSLog(#"Website: %#, Customer: %#, Hosting Provider: %#",ws.websiteUrl, cust.customerName, host.hostingProvider);
}
return fetchedObjects;
}
#end
I am trying to learn how to do it both ways, using cocoa binding and programmatically, so any kind solution will be appreciated. Links with some up to date tutorial will be also very welcomed.
I just forgot to mention...I bind the NSArrayController with ContentArray in Controller Content, and then I bind the NSTableView with the NSArrayController, as well as my Table Column,but I am getting empty NSTableView...no error is shown in console whatsoever.
If you use direct iVar access-- _websites-- to write the websites property's iVar, the KVO notification that the binding depends upon never happens.
If you instead use self.websites = or more explicitly [self setWebsites: ..., then you will trigger a KVO notification to the array controller that the value of the websites property has been updated.
Instead, the array controller in the Xib is unarchived and bound to websites before viewDidLoad, so at that point, websites is nil. And subsequently, you never trigger any KVO notification about websites changing value because you explicitly avoid using the websites accessor setWebsites and instead use direct instance variable access. So the AC never knows that websites changes and the table never reflects any value for websites except nil.
In general never use the instance variable to access a property's value unless you have a very good reason to do so and fully understand why you're doing so.
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
I want highlight text on UIWebView
I'm getting the error "unrecognized selector sent to instance 0x756cef0" when calling -[UIWebView highlightAllOccurencesOfString:]. The selector was declared in WBHighlight.h and I use forward declaration in WBSecondViewController.h.
WBSecondViewController.h
#class WBHighlight;
#import <UIKit/UIKit.h>
#interface WBSecondViewController : UIViewController <UIWebViewDelegate, UIScrollViewDelegate>
#property (weak, nonatomic) IBOutlet WBHighlight *webView;
- (IBAction)searchButtonPressed:(id)sender;
- (IBAction)clearHighlights:(id)sender;
#end
WBSecondViewController.m
#import "WBSecondViewController.h"
#import "WBHighlight.h"
#interface WBSecondViewController ()
#end
#implementation WBSecondViewController
-(IBAction)searchButtonPressed:(id)sender{
NSLog(#"highlighttes");
[_webView highlightAllOccurencesOfString:#"cat"];
}
-(IBAction)clearHighlights:(id)sender{
[_webView removeAllHighlights];
}
WBHighlight.h
#import <UIKit/UIKit.h>
#interface WBHighlight : UIWebView{
}
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str;
- (void)removeAllHighlights;
#end
WBHighlight.m
#import "WBHighlight.h"
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str
{
NSString *path = [[NSBundle mainBundle] pathForResource:#"UIWebViewSearch" ofType:#"js"];
NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
[self stringByEvaluatingJavaScriptFromString:jsCode];
NSString *startSearch = [NSString stringWithFormat:#"uiWebview_HighlightAllOccurencesOfString('%#')",str];
[self stringByEvaluatingJavaScriptFromString:startSearch];
NSString *result = [self stringByEvaluatingJavaScriptFromString:#"uiWebview_SearchResultCount"];
return [result integerValue];
}
- (void)removeAllHighlights
{
[self stringByEvaluatingJavaScriptFromString:#"uiWebview_RemoveAllHighlights()"];
}
#end
any idea?
This issue is due to you connected the WBHighlight outlet to a UIWebView.
Probably the WBHighlight is a subclassed UIWebView in which highlightAllOccurencesOfString: method is declared and defined. This method is not present in standard UIWebView, that's why it is throwing an error like: unrecognized selector sent to instance.
You need to change the class of UIWebView to WBHighlight in interface builder.
Go to your identity inspector
Select your WebView
Change the class of UIWebView to WBHighlight
Hekiru, You need to make the object of WBHighlight in order to call that method. And, for this you need to import that class and make object.
Let say,
WBHighlight *objWBHighlight = [WBHighlight new];
//Then, call that required method:
int someVarToAssign = [objWBHighlight highlightAllOccurencesOfString:#"fsfsf"];
Hope, it'll sort-out your problem.Try it.
In any concern let me know. :)
i have problems with a really basic thing. setting properties after instantiation a UIViewController-
header.h
IBOutlet UITextField *actionLocationFld;
#property (nonatomic, retain) IBOutlet UITextField *actionLocationFld;
main.h
#synthesize actionLocationFld;
(void)loadSocialActionView:(id)sender
{
self.socialActionView = [[SocialActionViewController alloc] init];
self.socialActionView.actionLocationFld.text = #"test";
[self.view addSubview:self.socialActionView.view];
}
actionLocationFld is a UITextfield. i try to set the text value after instantiation but it does not work. it looks so easy but i can´t figure out. what do i wrong?
any suggestions?
This may happen because actionLocationFld isn't initialized.
Try to call functions in this order:
self.socialActionView = [[SocialActionViewController alloc] init];
[self.view addSubview:self.socialActionView.view];
self.socialActionView.actionLocationFld.text = #"test";
i´ve solved it not by adding another property and passing it the value. it seems it is not possible to access the text property of an UITextfield by the way i tried. here´s the new code line
self.socialActionView.address = #"test";
inside of my viewcontroller i pass the value forward to self.view.actionLocationFld.text
I have an iPad app in progess but I'm having difficulty catching the selection of a row in my table view. I know this is because I haven't defined my delegate properly yet but, after 2 hours on the net, it still isn't making much sense.
What I'm trying to do is pass the selected table row item to a new view that displays info based on the selection - pretty standard.
I set up the tableViewController sub class using the option to create it as a UITableViewController subclass which, unless I am wrong, incorporates the delegates (UITableViewDelegate and UITableViewDataSource) automatically.
In the didSelectRowsAtIndex method I'm trying to create a DetailViewController. I've tried with a nib file and creating one purely in code but the class is never created. I'm missing a step I'm sure of it but I can't find what it is. At some point shouldn't I be defining what function I want to access with the selected row? But where? How?
In what I considered was my best attempt, I created the DetailViewController, set a string variable in the detailViewController to the selected row, and then tried to add the detailViewController view to display. I figured I could then use the viewDidload to call the next function but the view never got displayed on screen.
Some basic guidence would be nice. Or a decent tutorial would be nice. No calls to read the relevant docs please, I've been over it and right now I need a example to pull things together.
Thanks,
Steve
I think you are missing this line in your didSelectRowAtIndexPath: method
[self presentModalViewController:controller animated:YES];
where controller is an object of class DetailViewController
Yeah, maybe paste the code snippet will be easier to figure out what's going on here. And are those delegate(didSelectRowAtIndexPath:) methods being called correctly?
Try this,
this goes in didSelectRowAtIndexPath
MoreInfoTable *moreInfoView = [[MoreInfoTable alloc] initWithStyle:UITableViewStyleGrouped];
//in the MoreInfoTable, make properties like titles etc.
[self.navigationController pushViewController:moreInfoView animated:YES];
[moreInfoView release];
}
here's an example of an MoreInfoTable.h
#interface MoreInfoTable : UITableViewController {
NSMutableArray *moreInfo;
NSURL *getDirections;
NSURL *getWebsite;
NSMutableString *getPhoneNumber;
NSString *address;
NSString *footer;
float lat, lon;
}
-(void)goToWebsite;
-(void)goToMaps;
-(IBAction)addToFavorites:(id)sender;
-(void) callNumber;
#property (nonatomic,retain) NSURL *getDirections;
#property (nonatomic,retain) NSURL *getWebsite;
#property (nonatomic,retain) NSMutableString *getPhoneNumber;
#property (nonatomic,retain) NSString *footer;
#property (nonatomic,retain) NSString *address;
#property (readwrite) float lat;
#property (readwrite) float lon;
#end
now back in the other file in which you declare the table, you can say
MoreInfoTable *moreInfoView = [[MoreInfoTable alloc] initWithStyle:UITableViewStyleGrouped];
//in the MoreInfoTable, make properties like titles etc.
moreInfoView.title = #"TITLE!";
//etc.
[self.navigationController pushViewController:moreInfoView animated:YES];
[moreInfoView release]; //
I am semi-new to Objective-c and confused with why my NSMutableDictionary is not retaining information. I am declaring my variable in the header file:
#interface view_searchResults : UIViewController <UITableViewDataSource, UITableViewDelegate> {
NSMutableDictionary *imageDicationary;
}
#property (nonatomic, retain) NSMutableDictionary *imageDictionary;
Then in my .m file, I have the following:
#synthesize imageDictionary;
-(UIImage *)getImageForURL:(NSURL*)url {
UIImage*image;
image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];
[imageDictionary setObject:image forKey:#"test"];
if([imageDictionary objectForKey:#"test"]){
NSLog(#"Exists");
}
}
There is obviously other code to support this, but I can confirm that a URL is being passed, and the file is downloading correctly elsewhere. Also, I can confirm that this function is being executed, and I am not referring to the NSMutableDictionary anywhere else in the document.
Thanks!
Where do you create your NSMutable dictionary? If this really is all the code you have you need to create the dictionary:
#implementation view_searchResults
- (id) init;{
self = [super init];
if(self) {
imageDicationary = [NSMutableDictionary alloc] init]; // should also be released in dealloc.
}
return self;
}
If this is the error then the reason you are not causing a crash is because in objective-C it is valid to send a message to the nil object - it just does nothing.
You havent told us whether the "Exists" NSLog is executed, you also are NOT returning the image.
In other words, I fail to see your problem
Has imageDictionary been initialized? (alloc/init?)