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Check setImageWithURL image is loaded or place holder image is set



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Data science time! April 2019 and salary with experience
The Ask Question Wizard is Live!image is not getting loaded in viewios. ScrollView only showing one subview with imageDisplaying remote images in an UIImageview downloading progressively or like lazyloadingUIImageView does not load image from URL iphoneHTTP call runs first time but then waits foreverUITableView cell will not loade img with setImageWithUrlHow to change size of a tableview if there is no image to loadHow to load url link to imageview properly and how to manage the image in cache?UIImageView missing images in Launch Screen on deviceHow to load a image into dynamically created imageview from a URL in android?



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0















[imageView setImageWithURL: url placeholderImage: [UIImage imageNamed:@"DefaultBanner"]];



Using this code I am loading an image from a URL. The form does not submit until the image is not loaded from URL.



Can anyone assist me to fix this code?










share|improve this question
























  • Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

    – Mike Hay
    Mar 22 at 13:43

















0















[imageView setImageWithURL: url placeholderImage: [UIImage imageNamed:@"DefaultBanner"]];



Using this code I am loading an image from a URL. The form does not submit until the image is not loaded from URL.



Can anyone assist me to fix this code?










share|improve this question
























  • Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

    – Mike Hay
    Mar 22 at 13:43













0












0








0








[imageView setImageWithURL: url placeholderImage: [UIImage imageNamed:@"DefaultBanner"]];



Using this code I am loading an image from a URL. The form does not submit until the image is not loaded from URL.



Can anyone assist me to fix this code?










share|improve this question
















[imageView setImageWithURL: url placeholderImage: [UIImage imageNamed:@"DefaultBanner"]];



Using this code I am loading an image from a URL. The form does not submit until the image is not loaded from URL.



Can anyone assist me to fix this code?







objective-c uiimageview






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 22 at 12:01







Rahul Parikh

















asked Mar 22 at 11:52









Rahul ParikhRahul Parikh

2319




2319












  • Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

    – Mike Hay
    Mar 22 at 13:43

















  • Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

    – Mike Hay
    Mar 22 at 13:43
















Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

– Mike Hay
Mar 22 at 13:43





Can you please post more of your code, so that we can see the context where this code is running. See Minimal, Complete, Verifiable Example for guidelines.

– Mike Hay
Mar 22 at 13:43












1 Answer
1






active

oldest

votes


















0














This could be a thread concurrency problem, if you handle everything in the main thread it will freeze until the asset is totally downloaded. I will recommend send it to a serial queue in a background thread and after the download is done, send it to the main thread.



an example of that:



-(void) GCDSerialQueuesDownload

NSString * anURL = @"myURL.com";
dispatch_queue_t serialQueue = dispatch_queue_create("com.dispatch.feed.serial.queue",DISPATCH_QUEUE_SERIAL);
dispatch_queue_t mainQueue = dispatch_get_main_queue();

void (^addFeedBlock)(NSString*) = ^(NSString* url)
//your download here
dispatch_async(mainQueue,^
//after finish you download
);
;

dispatch_async(serialQueue, ^
addFeedBlock(anURL);
);




A good source






share|improve this answer























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    1 Answer
    1






    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0














    This could be a thread concurrency problem, if you handle everything in the main thread it will freeze until the asset is totally downloaded. I will recommend send it to a serial queue in a background thread and after the download is done, send it to the main thread.



    an example of that:



    -(void) GCDSerialQueuesDownload

    NSString * anURL = @"myURL.com";
    dispatch_queue_t serialQueue = dispatch_queue_create("com.dispatch.feed.serial.queue",DISPATCH_QUEUE_SERIAL);
    dispatch_queue_t mainQueue = dispatch_get_main_queue();

    void (^addFeedBlock)(NSString*) = ^(NSString* url)
    //your download here
    dispatch_async(mainQueue,^
    //after finish you download
    );
    ;

    dispatch_async(serialQueue, ^
    addFeedBlock(anURL);
    );




    A good source






    share|improve this answer



























      0














      This could be a thread concurrency problem, if you handle everything in the main thread it will freeze until the asset is totally downloaded. I will recommend send it to a serial queue in a background thread and after the download is done, send it to the main thread.



      an example of that:



      -(void) GCDSerialQueuesDownload

      NSString * anURL = @"myURL.com";
      dispatch_queue_t serialQueue = dispatch_queue_create("com.dispatch.feed.serial.queue",DISPATCH_QUEUE_SERIAL);
      dispatch_queue_t mainQueue = dispatch_get_main_queue();

      void (^addFeedBlock)(NSString*) = ^(NSString* url)
      //your download here
      dispatch_async(mainQueue,^
      //after finish you download
      );
      ;

      dispatch_async(serialQueue, ^
      addFeedBlock(anURL);
      );




      A good source






      share|improve this answer

























        0












        0








        0







        This could be a thread concurrency problem, if you handle everything in the main thread it will freeze until the asset is totally downloaded. I will recommend send it to a serial queue in a background thread and after the download is done, send it to the main thread.



        an example of that:



        -(void) GCDSerialQueuesDownload

        NSString * anURL = @"myURL.com";
        dispatch_queue_t serialQueue = dispatch_queue_create("com.dispatch.feed.serial.queue",DISPATCH_QUEUE_SERIAL);
        dispatch_queue_t mainQueue = dispatch_get_main_queue();

        void (^addFeedBlock)(NSString*) = ^(NSString* url)
        //your download here
        dispatch_async(mainQueue,^
        //after finish you download
        );
        ;

        dispatch_async(serialQueue, ^
        addFeedBlock(anURL);
        );




        A good source






        share|improve this answer













        This could be a thread concurrency problem, if you handle everything in the main thread it will freeze until the asset is totally downloaded. I will recommend send it to a serial queue in a background thread and after the download is done, send it to the main thread.



        an example of that:



        -(void) GCDSerialQueuesDownload

        NSString * anURL = @"myURL.com";
        dispatch_queue_t serialQueue = dispatch_queue_create("com.dispatch.feed.serial.queue",DISPATCH_QUEUE_SERIAL);
        dispatch_queue_t mainQueue = dispatch_get_main_queue();

        void (^addFeedBlock)(NSString*) = ^(NSString* url)
        //your download here
        dispatch_async(mainQueue,^
        //after finish you download
        );
        ;

        dispatch_async(serialQueue, ^
        addFeedBlock(anURL);
        );




        A good source







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 23 at 1:10









        Pedro TrujilloPedro Trujillo

        16227




        16227





























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