image download and display

Discussion in 'iPhone/iPad Programming' started by jagatnibas, Aug 5, 2008.

  1. macrumors regular

    Joined:
    Jul 28, 2008
    #1
    Hi All,

    I am trying to do a simple thing on iphone simulator. I want to download an image from an url and display it. Please find my code below. I have modified the helloworld program. the image is not getting displayed. Please advise where i am going wrong. it is showing hello world as usual, and no image. If i copy paste the url in safari, it shows me the image.

    regards
    Jagat

    _____

    /*

    File: HelloWorldAppDelegate.m
    Abstract: Responsible for creating the view controller and adding its view to
    the window.

    See the ReadMe file for pointers to additional resources about iPhone
    development.

    Version: 1.7

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    The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
    WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
    WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
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    IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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    */

    #import "HelloWorldAppDelegate.h"
    #import "MyViewController.h"


    @implementation HelloWorldAppDelegate

    @synthesize window;
    @synthesize myViewController;

    UIImage *img;

    - (void)applicationDidFinishLaunching:(UIApplication *)application {

    // Set up the view controller
    MyViewController *aViewController = [[MyViewController alloc] initWithNibName:mad:"HelloWorld" bundle:[NSBundle mainBundle]];
    self.myViewController = aViewController;
    [aViewController release];

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque];

    id path = @"http://merrimusings.mu.nu/archives/images/groundhog2.jpg";
    NSURL *url = [NSURL URLWithString:path];
    NSData *data = [NSData dataWithContentsOfURL:url];
    /*UIImage **/img = [[UIImage alloc] initWithData:data cache:NO];

    // Add the view controller's view as a subview of the window
    UIView *controllersView = [myViewController view];
    [window addSubview:controllersView];
    [window makeKeyAndVisible];
    }

    - (void) drawRect:(CGRect) Rect{
    [img drawAtPoint:CGPointMake(10, 10)];
    }

    - (void)dealloc {
    [myViewController release];
    [window release];
    [super dealloc];
    }

    @end


    _____
     
  2. Moderator emeritus

    kainjow

    Joined:
    Jun 15, 2000
    #2
    drawRect: is a method of UIView, and it gets called automatically, but you're not using it in a UIView so it won't work. Use a UIImageView instead.
     
  3. thread starter macrumors regular

    Joined:
    Jul 28, 2008
    #3
    how ?

    Does default helloworld example use a view ? where should i have put this function then ?

    if i were to use uiimageview, how would i go about it ?

    sorry i am new to objectc

    Jagat
     
  4. thread starter macrumors regular

    Joined:
    Jul 28, 2008
    #4
    oops will my patience bear fruit ?

    I kinda miffed with whether people knowing mac/iphone/objective C deliberately suppress information [subsequent knowledge] to themselves !

    anyway,

    i tried doing

    - (id)initWithImage:(UIImage *)img;

    basically where should have I put this line ? wont i get a fully functional uiimageview example somewhere ?

    regards
     
  5. macrumors 603

    Cromulent

    Joined:
    Oct 2, 2006
    Location:
    The Land of Hope and Glory
    #5
    Not at all. Your question seems like it is better answered by reading the freely available developer documentation available from Apple.

    Sounds like you could benefit from actually spending some time learning Objective-C rather than relying on tutorials.

    I think this document will be of some help.
     
  6. thread starter macrumors regular

    Joined:
    Jul 28, 2008
    #6
    thanks... but ....

    thanks, a good reference...

    http://www.youtube.com/watch?v=MdYqUD7SffQ

    This looked to me a good starting point. But when i try to do file->new application i dont see a cocoa touch application !

    regards
    Jagat
     

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