What syntax would make this work?
NSString *curstring = [cur description];
UIImage *weatherimage = [UIImage imageNamed: #"#%.png", curstring];
[weather setImage:weatherimage];
Thanks
You're looking for NSString's stringWithFormat:
UIImage *weatherimage = [UIImage imageNamed:[NSString stringWithFormat:#"#%.png", curstring]];
Related
I have a folder in Images.xcassets which have 24 images. I want to add those images to the UIImage array and try to animate those images in a sequence. Is it possible to load the images from Images.xcassets into Array? Or is it better to use SVG images for animation?
To get single image I tried the following:
UIImage *image = [UIImage imageNamed:#"FolderName"];
But I guess this needs to be modified as an Image array.
I guess this might help you
UIImageView *imageView = [UIImageView.alloc initWithFrame:self.view.bounds];
[self.view addSubview:imageView];
NSMutableArray *images = NSMutableArray.array;
NSInteger imageCount = 24;
NSString *imagePrefix = #"imageName_";
for(int i = 0; i<=imageCount; i++){
NSString *imageName = [NSString stringWithFormat:#"%#%d",imagePrefix, i];
UIImage *image = [UIImage imageNamed:imageName];
[images addObject:image];
}
imageView.animationImages = images;
imageView.animationRepeatCount = 1;
imageView.animationDuration = 3.0;
[imageView startAnimating];
I am a newbie in iOS development. I am trying to send a clicked image by encoding it into base64 format using SOAP. I don't know how to do this.
This is my imagePickerController delegate:
// delegate method for picking images
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *mediaType = [info valueForKey:UIImagePickerControllerMediaType];
if([mediaType isEqualToString:(NSString*)kUTTypeImage])
{
UIImage *photoTaken = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
//Save Photo to library only if it wasnt already saved i.e. its just been taken
if (picker.sourceType == UIImagePickerControllerSourceTypeCamera)
{
UIImageWriteToSavedPhotosAlbum(photoTaken, self, #selector(image:didFinishSavingWithError:contextInfo:), nil);
NSData *data=[[NSData alloc] initWithData:UIImagePNGRepresentation(photoTaken)];
base64= [[NSString alloc]init];
base64 =[data base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn];
}
}
// [picker dismissModalViewControllerAnimated:YES];
[picker dismissViewControllerAnimated:YES completion:NULL];
[picker release];
}
in didFinishPickingMediaWithInfo..
UIImage* chosenImage =info[UIImagePickerControllerEditedImage];
//encoding image to base64
imgData=[[NSData alloc] initWithData:UIImagePNGRepresentation(chosenImage)];
_base64=[[NSString alloc]init];
_base64=[imgData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
self.tempbase= _base64;
and calling tempbase in soap message
The image size will be huge. It can reduce your app performance hence decrase the image size first by resizing the image.
-(UIImage *) imageWithImage:(UIImage *) image scaledTOSize:(CGSize) newsize
{
UIGraphicsBeginImageContext(newsize);
[image drawInRect:CGRectMake(0, 0, newsize.width, newsize.height)];
UIImage *newImg=UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImg;
}
Now convert this small sized UIImage into NSData
NSData *imgData=[[NSData alloc] initWithData:UIImagePNGRepresentation(image)];
Then convert NSData into base64 string using third party library -
base64.h
NSData+Base64.h
NSstring *imgString = [imgData base64EncodedString];
imgString = [imgString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
Now send this string to your services.
Code:
UIGraphicsBeginImageContext(self.drawImage.frame.size);
[self.drawImage.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *imageView = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData* data = UIImageJPEGRepresentation(imageView, 1.0f);
[Base64 initialize];
NSString *strEncoded = [Base64 encode:data];
NOTE: drawImage is object of UIImageView and Import Base64.h class.
I want to put defaults images if i don't have images from url feed.
if(![[stories objectAtIndex:storyIndex] valueForKey:#"url"]==nil)
{ NSNumber *numberOfKeyInstances = [stories valueForKey:#"key"];
imageArray=[NSArray arrayWithObjects:[UIImage imageNamed:#"1.png"],nil];
int randomNumber_ = rand ()%19;
UIImage *image = [imageArray objectAtIndex:indexPath.row];
cell.imag=image;
}
else{
if (![[[stories objectAtIndex:storyIndex] valueForKey:#"url"] isEqualToString:#""]) {
[cell.imag setImageWithURL:[NSURL URLWithString:[[stories objectAtIndex:storyIndex] objectForKey:#"url"]] placeholderImage:[UIImage imageNamed:#"Alb.png"]];
}
}
This is my code, but i get [UIImage setContentMode:]: unrecognized selector sent to instance 0x7f908c1dcce0'
How can i solved?
Firstly, imageArray is initialised with only one image. So calling [imageArray objectAtIndex:indexPath.row] is a problem. You dont need an image array for that. Secondly, the argument inside the first if statement doesn't look right.
Also, as #midhun-mp Pointed out, u should be probably using cell.imag.image.
Try this :
if([[stories objectAtIndex:storyIndex] valueForKey:#"url"] == nil)
{
cell.imag.image = [UIImage imageNamed:#"1.png"];
}
else if ([[[stories objectAtIndex:storyIndex] valueForKey:#"url"] isEqualToString:#""])
{
cell.imag.image = [UIImage imageNamed:#"1.png"];
}
else
{
//SET YOUR IMAGE HERE
}
Try to change
UIImage *image = [imageArray objectAtIndex:indexPath.row];
to
UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:[imageArray objectAtIndex:indexPath.row]]];
I suspect that cell.imag is a UIImageView not UIImage property.
So you need to change:
cell.imag=image;
to
cell.imag.image = image;
I am very new to xcode and I am playing around with image arrays and NSMutableArray. When I run the code below it just print out the names of the image for example "image1.png". Any tips to fix this problem would be appreciated. Thanks.
- (NSMutableArray*)restaurantArray;
{
if (_restaurantArray == nil) {
_restaurantArray = [[NSMutableArray alloc] initWithObjects:
#"image1.png",
#"image2.png",
#"image3.png",
nil];
}
return _restaurantArray;
}
-(NSString*) randomRestaurant
{
int random = arc4random_uniform(self.restaurantArray.count);
return [self.restaurantArray objectAtIndex:random];
}
You could do it in this way also.
- (NSMutableArray*)restaurantArray;
{
if (_restaurantArray == nil) {
_restaurantArray = [[NSMutableArray alloc] initWithObjects:[UIImage imageNamed:#"image1.png"],
[UIImage imageNamed:#"image2.png"],
[UIImage imageNamed:#"image3.png"],
nil];
}
return _restaurantArray;
}
Do you mean this?:
NSString *imageName = [self randomRestaurant];
UIImage *image = [UIImage imageName:imageName];
If you want to display the image then do this:
Suppose you have an imageview name imgView,
imgView.image = [UIImage imageNamed:[self randomRestaurant]];
Or, if you just want the image, then call this:
UIImage *img = [UIImage imageNamed:[self randomRestaurant]];
In you given code, you are just returning the name of the image, not the actual image. If you want an array of image then you can do it by this way:
-(NSMutableArray*) restaurantArray;
{
if (_restaurantArray == nil) {
UIImage *img = [UIImage imageNamed:#"image1.png"];
UIImage *img1 = [UIImage imageNamed:#"image2.png"];
UIImage *img2 = [UIImage imageNamed:#"image3.png"];
_restaurantArray = [[NSMutableArray alloc] initWithObjects:
img,
img1,
img2,
nil];
}
return _restaurantArray;
}
-(UIImage*) randomRestaurant
{
int random = arc4random_uniform(self.restaurantArray.count);
return [self.restaurantArray objectAtIndex:random];
}
Hope this helps.. :)
I have these two methods. How do I call them?
//to base 64 string
-(NSString *)getStringFromImage:(UIImage *)image{
if(image){
NSData *dataObj = UIImagePNGRepresentation(image);
return [dataObj base64Encoding];
} else {
return #"";
}
}
//Convert back
// NSData *dataObj = [NSData dataWithBase64EncodedString:beforeStringImage];
// UIImage *beforeImage = [UIImage imageWithData:dataObj];
If you want to call the method from same class, you could call like as follows:
UIImage *image = [UIImage imageNamed:#"someimg.png"];
NSString *str = [self getStringFromImage:image];
Else, if you want call the method from different class, then do as follows:
Assume clInstance be the instance of the class having that method, then
UIImage *image = [UIImage imageNamed:#"someimg.png"];
NSString *str = [clInstance getStringFromImage:image];