I want to set textfield background image same as Default contact app.
Is there any built-in type for that?
If I take the custom image then what size should be taken? because iPad has variable length of textfield.
You change the two way one is code used to change
UITextField *textField;
textField.background = [UIImage imageNamed:#"imageName"];
textField.borderStyle = UITextBorderStyleNone;
Another one way is you to change in text property at attribute inspector
I think you have to strech image from center and place as textfield.background.
[[UIImage imageNamed:#"image"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 10, 0, 10) resizingMode:UIImageResizingModeStretch];
You can also refers this from link.
Also here is the best example.
Related
UIButton top border appears thicker than the following ,but sometimes correct ，why?
code:
UIImage * sanImage = [UIimage imageNamed:#"product_bt1_normal"];
[self.saveBtn setBackgroundImage:[sanImage
stretchableImageWithLeftCapWidth:sanImage.size.width/3
topCapHeight:sanImage.size.height/3] forState:UIControlStateNormal];
Are you trying to make a button? If so, perhaps use a UIButton instead? You can control the border with button.layer.borderWidth = 1.0f
If you're set on using an image, create a UIImageView, and modify the border thickness that way:
UIImageView *iv = [[UIImageView alloc] initWithImage:sanImage];
[iv.layer setBorderWidth:0.5f];
It could be because of off-pixel boundaries. Since you are using height/3.0f, your image is maybe not returning a well-behaved image.
Also, there is a new stretchable image method you should be using, resizableImageWithCapInsets:.
So try this code out:
[self.saveBtn setBackgroundImage:[sanImage resizableImageWithCapInsets:UIEdgeInsetsMake(3.0f, 3.0f, 3.0f, 3.0f)] forState:UIControlStateNormal];
You might need to mess with the values for the insets a bit, I don't know the dimensions of your button image.
On my nav bar, I have a couple of rightBarButtonItems that have custom icons (the icon images are white, which worked well with the basic color scheme of iOS 6).
Under iOS 7, loading the images using initWithTitle (see code snippet 1) replaces the "white" color in the icon with the proper global tint (a specific color of dark blue in this case)
Code Snippet 1:
UIBarButtonItem *refreshButton = [[UIBarButtonItem alloc] initWithTitle:#"" style:(UIBarButtonItemStyle) UIBarButtonSystemItemCancel target:(self) action:#selector(refreshList)];
refreshButton.image = [UIImage imageNamed:#"RefreshIcon.png"];
However, I needed to use initWithCustomView to overcome a weird change in behavior that was causing the icons to move out of view. The basic idea was to specifically set the size of the icons. initWithCustomView solved the sizing problem, but does not display the button images with the global tint, they are displayed in the color of the image (white). Code Snippet 2 shows how I am creating the button with initWithCustomView.
Code Snippet 2:
CGRect frameCustomButton2 = CGRectMake(0.0, 0.0, 18.0, 18.0);
UIButton *customButton2 = [[UIButton alloc] initWithFrame:frameCustomButton2];
[customButton2 setBackgroundImage:iconRefreshButton forState:UIControlStateNormal];
UIBarButtonItem *barCustomButton2 =[[UIBarButtonItem alloc] initWithCustomView:customButton2 ];
barCustomButton2.image = iconRefreshButton;
[customButton2 addTarget:self action:#selector(refreshList) forControlEvents:UIControlEventTouchUpInside];
All of this code is of course in (void)viewDidLoad. I have tried things like:
barCustomButton2.tintColor = [UIColor blackColor]; //doesn't work
or
[barButtonAppearance setTintColor:[UIColor blackColor]]; // doesn't work
and they do not override the white color of the image. It is almost as if the creation of the custom view takes place after the view looks at the global tint color?
How can I ensure the button icon takes on the global tint?
Thanks!
Just wanted to get this into a root comment to give better context to the "answer" checkmark, and give better formatting.
I was able to figure this one out! You can tell the image to always render as template, which will force it to take on the global tint color.
UIImage *iconRefreshButton = [UIImage imageNamed:#"MyIconFilename.png"];
iconRefreshButton = [iconRefreshButton imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
The default, if you don't set it, is "UIImageRenderingModeAutomatic" which means it will render as a template or original image based on context.
You'll either have to work around the issue you were having with the first code snippet, or you'll have to create a UIButton subclass that uses its image as a mask to show the tint color in drawRect:.
I'd recommend the first approach.
I want to build a UIButton out of 3 images (A,B,C). A and C are stretchable components (depending on the button text) the middle part is fixed.
What is the best way to attach these images to one another? How can I be flexible in the implementation without specifying all origins and widths and so on... Is it necessary to have a surrounding rectangle?
You need to stitch your images together in an image editor to create a single image. Then you'll load this image, and create a resizable version using the UIImage resizableImageWithCapInsets:resizingMode: method. You'll specify UIEdgeInsets that mirror the original widths of your two "end cap" images.
For the button itself you need to make this resizable image the background image of the button. It won't work as a foreground image.
UIImage* bgImage = [[UIImage imageNamed:#"my_bg_image"] resizableImageWithCapInsets: UIEdgeInsetsMake(0, 10, 0, 10)];
UIButton* b = [UIButton buttonWithType: UIButtonTypeCustom];
[b setBackgroundImage: bgImage forState: UIControlStateNormal];
I've had to implement something like this recently.
My strategy was to build what I wanted using UIView objects, and then write the created view to a UIImage.
I'd recommend:-create a container view-create UILabels for the button text, add to container view-for labels A and C, sizeToFit them after they have their text, and then use that information to place the stretchable buttons in the view-once the subviews are positioned, you'll probably want to reset the frame of your container view to make sure it is still correct.
once your view looks the way you want it, write it to an image using:
UIGraphicsBeginImageContextWithOptions(container.frame.size, NO, 0); //or YES if you have no opacity in your images
[container.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
-you can then set this as the image for your UIButton
The best way to do this is to put the 3 images into one file, and use resizableImageWithCapInsets:. See the doco here.
Here's a good tutorial on how to do this.
// Set the button background image
UIImage * buttonImage = [UIImage imageNamed:#"button_resizable.png"];
UIImage * resizableButtonImage = [buttonImage resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12, 0, 12)];
[button setBackgroundImage:resizableButtonImage forState:UIControlStateNormal];
Currently I am setting a leftView with an image and I am finding that the image is too close to the text input view (which in this case is the standard UITextField text input view). Is there a way to shift the frame of the text input view slightly so as to increase the distance between it and the leftView?
You should be able to modify the frame property for the UIImageView you're assigning to the UITextField's leftView.
For example you might be able to do something like this:
UIImageView *someImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"someImage"]];
// add 5 points to each side of the frame while keeping the same center point
someImageView.frame = CGRectInset(someImageView.frame, -5, 0);
textField.leftViewMode = UITextFieldViewModeAlways;
textField.leftView = someImageView;
Note that you may also need to modify the UIImageView's contentMode property to get the desired effect (e.g. you can use UIViewContentModeLeft to left-align the image or UIViewContentModeCenter to center-align it).
I have a custom class inheriting from UITableViewCell class that shows either an image (left to the title) or a generic dark-colored square if the image is not available). The following code shows a dark square on a light-colored cell background:
imageView = [[UIImageView alloc] initWithFrame:CGRectMake(11, 6, 40, 40)];
[imageView setBackgroundColor:kBackgroundGreyColour];
[cell.contentView addSubview:imageView];
However, instead of creating a custom subview in each table cell I would rather like to use the existing imageView property of the generic UITableViewCell class and modify it somehow to show the square as the code above does. This is what I am trying at this moment:
UIImageView* iv = [[UIImageView alloc] initWithFrame:CGRectMake(11, 6, 40, 40)];
[iv setBackgroundColor:[UIColor redColor]];
self.imageView.hidden = NO;
self.imageView.opaque = iv.opaque;
self.imageView.alpha = iv.alpha;
self.imageView.image = iv.image;
[self bringSubviewToFront:self.imageView];
[self.imageView setBackgroundColor:[UIColor redColor]];
I added all those lines to set as many of the existing UIImageView properties to the same values as the created UIImageView instance in the first code snippet, and yet the second code snippet doesn't show any dark square. It just doesn't show anything at all and the cell looks like there is just the light background and no image view visible. But I see that the imageView property is not nil so executing all those lines of code in the second snippet should show something?
However, as soon as I assign a new image to the imageView property (e.g. self.imageView.image = [[UIImage alloc] init...], the square shows the assigned image without problems.
Edit: Just a note that in the second case I am setting the frame of the imageView in layoutSubview function, e.g.:
-(void)layoutSubviews
{
[super layoutSubviews];
self.imageView.frame = CGRectMake(11, 6, 40, 40);
}
So my questions are:
1. Which properties of the existing imageView property I would need to set and to what values so that the code will show a square filled with a specific color (like the first snippet of code does)?
Is there a way of creating the UIImage programatically so that it shows only a background color without any image associated with it (and which I could use to set the imageView.image property to show that color).
Is it possible to replace the existing imageView property in a UITableViewCell class with a custom view without adding a custom subview (like the first code snippet did), so that I can show a placeholder UIView with a background color when the image is not available?
The reason why your code doesn't work, is as you guessed; Because when you set the background colour of an imageview, it doesn't create anything on the image property.
And, you've figured out that you can't directly set the imageview property of the cell either.
I'd say your best bet, is the former option; To create a UIImage programmatically.
Although, I'd highly suggest simply creating one in your favourite image editing software then including it in the bundle. It makes for easy replacement later, for when you may get a better image, and next to no code and effort required to replace.
But if you still wish to do it all programmatically, it's not as simple as you'd hope.
CGRect rect = CGRectMake(11, 6, 40, 40);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [kBackgroundGreyColour CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.imageview.image = image;
Should do the trick.
This defines the image size, creates a graphics context (think of it as a canvas), picks your grey colour to use, paints the canvas with it, then scans it into your computer into the small little size you wanted.
The little green imp does it all behind the screen (Sorry, too much Terry Pratchett).