How to set image to UIImage

Question

How can I set image to UIImage object. For example:

UIImage *img = [[UIImage alloc] init];
[img setImage:[UIImage imageNamed:@"anyImageName"]];

My UIImage object is declared in .h file and allocated in init method, I need to set image in viewDidLoad method. Any ideas?

you can **declare** something in interfaces (what you call .h file), but not create it there. — vikingosegundo, Jun 07 '12 at 12:43

vikingosegundo · Accepted Answer · 2012-06-07T12:18:55.317

58

UIImage *img = [UIImage imageNamed:@"anyImageName"];

imageNamed:
Returns the image object associated with the specified filename.
    + (UIImage *)imageNamed:(NSString *)name
Parameters
name
The name of the file. If this is the first time the image is being loaded, the method looks for an image with the specified name in the application’s main bundle.
Return Value
The image object for the specified file, or nil if the method could not find the specified image.

Discussion
This method looks in the system caches for an image object with the specified name and returns that object if it exists. If a matching image object is not already in the cache, this method loads the image data from the specified file, caches it, and then returns the resulting object.

edited Jun 07 '12 at 12:18

answered Jun 07 '12 at 12:11

vikingosegundo

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object is created in .h file and allocated in init method, I need set image in viewDidLoad method. – Shamsiddin Saidov Jun 07 '12 at 12:14
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so create a property and assign it to it – vikingosegundo Jun 07 '12 at 12:16
no, but if you want to know about properties, you should ask a new question and not try to deal with it in comments to an answer to an questions about how to create a UIImage with an image file. – vikingosegundo Jun 07 '12 at 13:01

score 11 · Answer 2 · edited Sep 25 '12 at 07:33

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Create a UIImageView and add UIImage to it:

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image Name"]] ;

Then add it to your view:

[self.view addSubView: imageView];

edited Sep 25 '12 at 07:33

Ankit Jain

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answered Jun 07 '12 at 12:17

Shailesh

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score 2 · Answer 3 · answered Jan 10 '17 at 13:06

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Just Follow This

UIImageView *imgview = [[UIImageView alloc]initWithFrame:CGRectMake(10, 10, 300, 400)];
[imgview setImage:[UIImage imageNamed:@"YourImageName"]];
[imgview setContentMode:UIViewContentModeScaleAspectFit];
[self.view addSubview:imgview];

answered Jan 10 '17 at 13:06

Dixit Akabari

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score 1 · Answer 4 · answered Jun 07 '12 at 12:13

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There is an error on this line:

[img setImage:[UIImage imageNamed@"anyImageName"]];

It should be:

[img setImage:[UIImage imageNamed:@"anyImageName"]];

answered Jun 07 '12 at 12:13

WhoaItsAFactorial

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It is wrong. because an UIImage have not any method like setImage: . – BHASKAR Aug 12 '14 at 13:27
in this code right but one mistake also solve out Mr.jeremy .. Thank u sir share your knowledge – Ramani Hitesh Sep 20 '17 at 09:17

Maulik · Answer 5 · 2012-06-07T12:33:22.407

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UIImage *img = [UIImage imageNamed@"aImageName"];

edited Jun 07 '12 at 12:33

answered Jun 07 '12 at 12:14

Maulik

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score 1 · Answer 6 · answered Jun 07 '12 at 12:14

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may be:

UIImage *img = [[UIImage alloc] init];

and when you want to change the image:

img = [UIImage imageNamed:@"nameOfPng.png"];

but the object wasn't in the same place in the memory, but if you use the pointer, the same pointer will be point to the last image loaded.

answered Jun 07 '12 at 12:14

Vincent Saluzzo

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and this is call memory leak :) – Shamsiddin Saidov Jun 07 '12 at 12:19
Yes sure, but before the reassigned the new image, you made a [img released]. I don't put it here, because it's the base of Objective-C... – Vincent Saluzzo Jun 08 '12 at 09:03
well even in non-ARC `-released` will yield a selector not found error. – vikingosegundo Oct 14 '14 at 11:37

score 0 · Answer 7 · edited Jun 09 '12 at 19:20

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Like vikingosgundo said, but keep in mind that if you use [UIImage imageNamed:image] then the image is cached and eats away memory. So unless you plan on using the same image in many places, you should load the image, with imageWithContentsOfFile: and imageWithData:

This will save you significant memory and speeds up your app.

edited Jun 09 '12 at 19:20

Luke

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answered Jun 07 '12 at 12:16

Trausti Thor

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score 0 · Answer 8 · answered Sep 22 '12 at 04:49

First declare UIImageView and give it frame

UIImageView *imageView = [[UIImageView alloc] initWithFrame: CGRectMake( 10.0f, 15.0f, 40.0f,40.0f )];
        [imageView setBackgroundColor: [UIColor clearColor]];
        [imageView setImage:[UIImage imageNamed:@"comments_profile_image.png"]];
        [self.view addSubview: imageView];

score 0 · Answer 9 · edited May 30 '13 at 09:38

You can set an Image in UIImage object eiter of the following way:

UIImage *imageObject = [UIImage imageNamed:@"imageFileName"]; but by initializing UIImage Object like this, the image is always stored in cache memory even you make it nil like imageObject=nil;

Its better to follow this:

NSString *imageFilePath = [[NSBundle mainBundle] pathForResource:@"imageFilename" ofType:@"imageFile_Extension"];
```
UIImage *imageObject = [UIImage imageWithContentsOfFile:imageFilePath];
```

EXAMPLE: NSString *imageFilePath = [[NSBundle mainBundle] pathForResource:@"abc" ofType:@"png"];

UIImage *imageObject = [UIImage imageWithContentsOfFile:imageFilePath];

score 0 · Answer 10 · answered Aug 12 '14 at 13:28

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just change this line

[img setImage:[UIImage imageNamed:@"anyImageName"]];

with following line

img = [UIImage imageNamed:@"anyImageName"];

answered Aug 12 '14 at 13:28

BHASKAR

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score 0 · Answer 11 · answered Sep 30 '15 at 09:24

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You can't alloc UIImage, this is impossible. Proper code with UIImageView allocate:

UIImageView *_image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"something.png"]] ;

Draw image:

CGContextDrawImage(context, rect, _image.image.CGImage);

answered Sep 30 '15 at 09:24

theWalker

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score 0 · Answer 12 · answered May 18 '16 at 06:19

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Try this code to 100% work....

UIImageView * imageview = [[UIImageView alloc] initWithFrame:CGRectMake(20,100, 80, 80)];
imageview.image = [UIImage imageNamed:@"myimage.jpg"];
[self.view  addSubview:imageview];

answered May 18 '16 at 06:19

P.J.Radadiya

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How to set image to UIImage

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