Please help me. I am phasing a problem, show a delete button on top of the view.
Without using bezier path showing like this
When i use bezier path is showing like this
how i can show the button.
This is the code i am using
UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)];
[view1 setBackgroundColor:[UIColor orangeColor]];
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view1.bounds byRoundingCorners:UIRectCornerTopLeft| UIRectCornerTopRight cornerRadii:CGSizeMake(10.0, 10.0)];
// Create the shape layer and set its path
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = view1.bounds;
maskLayer.path = maskPath.CGPath;
// Set the newly created shape layer as the mask for the image view's layer
view1.layer.mask = maskLayer;
[self.view addSubview:view1];
UIButton *bt1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[bt1 setTitle:#"D" forState:UIControlStateNormal];
[bt1 setFrame:CGRectMake(87, -10, 25, 25)];
[view1 addSubview:bt1];
please help me. Thanks in advance.
You could always add the button in your superview depending of the view's position.
What #Larme said is true ,when you're making a view you're masking all the subviews that view has.
In case you don't want to do that just enter in your view's drawRect and draw there transparent corners to achieve the same effect.
Related
I have a UIView in which I define it's border in the following manner:
self.layer.borderColor = [UIColor blackColor].CGColor;
self.layer.borderWidth = 3;
I attach a subview to this UIView, and when I move the subview over the border, it goes underneath it. Is this the intended behavior? Is there anyway to make the subview go on top of it?
According to the Apple specification: It is composited above the receiver’s contents and sublayers.
So, the border will always be above of all your subviews, even if you bring your subview to the front and so on.
So I make a background view to fake the border.
E.g.:
UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
backgroundView.backgroundColor = [UIColor blackColor];
backgroundView.clipsToBounds = NO;
UIView *bView = [[UIView alloc] initWithFrame:CGRectInset(backgroundView.bounds, 3, 3)];
bView.backgroundColor = [UIColor redColor];
UIView *cView = [[UIView alloc] initWithFrame:CGRectMake(-50, -50, 100, 100)];
cView.backgroundColor = [UIColor yellowColor];
[bView addSubview:cView];
[backgroundView addSubview:bView];
[self.window addSubview:backgroundView];
and the effect:
Depending on your view structure, it might be easier to add the subview to the parent of your main view. It can then overlap the main view and will overlay the border as you requested.
Did you try setting the superview's 'clipsToBounds' property to YES? This is set to NO by default for performance reasons, but setting it to yes might give you the effect you are looking for.
Insert layer at specific position that suits you:
self.layer.insertSublayer(sublayer, at: 0)
lets say i have a UIImageView with a frame (0,0,100,30)
.that imageView was assigned an image.
whats the simplest way to show only part of the image?
for example: only what appears in points 30-60 (width) and 0-30 (height). that means that the left and right edges of the image should be hidden.
just to clarify, i don't want to move the view nor change it's size, i just want to hide a subrect of it's frame.
You could always set a mask.
CALayer *maskLayer = [CALayer layer];
maskLayer.backgroundColor = [UIColor blackColor].CGColor;
maskLayer.frame = CGRectmake(30.0, 0.0, 30.0, 30.0);
view.layer.mask = maskLayer;
Masks can be any type of layer, so you could even use a CAShapeLayer for complex masks and do some really cool stuff.
i've found this solution works for me, https://stackoverflow.com/a/39917334/3192115
func mask(withRect rect: CGRect, inverse: Bool = false) {
let path = UIBezierPath(rect: rect)
let maskLayer = CAShapeLayer()
if inverse {
path.append(UIBezierPath(rect: self.view.bounds))
maskLayer.fillRule = kCAFillRuleEvenOdd
}
maskLayer.path = path.cgPath
imageView?.layer.mask = maskLayer
}
I believe masking the image is the best option. But if you were to rotate, transform, animate or want a clear background you can do something like this:
Create a sub view which is the size of the image you want to show. Make sure it has clipsToBounds to true and position the image accordingly.
UIView *mainView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 30)];
//this is the part of the image you wish to see
UIView *imageWindow = [[UIView alloc] initWithFrame:CGRectMake(30, 0, 30, 30)];
imageWindow.clipsToBounds = YES;
//your image view is the height and width of mainView and x and y is imageWindow - mainView. You can do this manually or put in calculations.
UIImageView *myImage = [[UIImageView alloc] initWithFrame:CGRectMake(imageWindow.frame.origin.x - mainView.frame.origin.x, imageWindow.frame.origin.y - mainView.frame.origin.y, mainView.frame.size.width, mainView.frame.size.height)];
myImage.image = [UIImage imageNamed:#"1024x1024.png"];
[imageWindow addSubview:myImage];
[mainView addSubview:imageWindow];
[self.view addSubview:mainView];
Looking over my code, I don't think mainView is necessary and you could add imageWindow to self.view directly.
I have a Master-Details project setup and running in XCode with no problems at all and everything works fine. However, when I attempt to round the top right and left corners of the NavigationBar it has a very strange effect. It basically, offsets the 'touch' response of the 'back' left button on the details view.
The button still works, but it seems that the iPhone can only pick up the user's touch when they click just below the NavigationBar and not the button itself.
The code I have is:
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
UIColor *color = [UIColor darkGrayColor];
UIImage *img = [UIImage imageNamed:#"nav-bar"];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = color;
// Create mask to round corners
CGRect bounds = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(10.0, 10.0)];
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = bounds;
maskLayer.path = maskPath.CGPath;
// Apply mask to navigation bar
[self.layer addSublayer:maskLayer];
self.layer.mask = maskLayer;
// Apply logo to navigation bar
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"logo"]];
self.topItem.titleView = imageView;
}
Here is a screen shot of what I mean, button only responses when I touch where the arrow is pointing:
--- UPDATE ---
After some testing I've worked out the problem is with the 'self.layer.mask = maskLayer' line. I have refactored the code and tested in another project that just uses xib files and not story boards, and dont have any problems, but its still not working in the current project.
CGRect bounds = CGRectMake(0, 0, navigationController.navigationBar.bounds.size.width,
navigationController.navigationBar.bounds.size.height);
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(10.0, 10.0)];
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = bounds;
maskLayer.path = maskPath.CGPath;
// Apply mask to navigation bar
//navigationController.navigationBar.layer.mask = maskLayer;
[navigationController.navigationBar.layer addSublayer:maskLayer];
navigationController.navigationBar.layer.mask = maskLayer;
use self.bounds instead of self.frame. You probably want to draw relatively to your own coordinates system and not relatively to your own parent view.
Please check below image. i have added scrollview in "BLACK" color and added subview in "GREY" color. now i want to make subview transparent which is define as "WHITE" color.
Please refer the below code. Let me know how to make button transparent with particular frame or let me know if you have any alternative for that.
self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 40.0, self.frame.size.width, 300.0)];
self.scrollView.contentSize = CGSizeMake(self.bounds.size.width,ViewHeight);
self.scrollView.autoresizingMask=UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.scrollView.delegate = self;
self.scrollView.backgroundColor =[UIColor blackColor];
[self.view addSubview:self.scrollView
UIButton *butApp = [UIButton buttonWithType:UIButtonTypeCustom];
[butApp setFrame:CGRectMake(x, y , w, h)];
[butApp setBackgroundColor:[UIColor greyColor]];
[self.scrollView addSubview:butApp];
UIButton* gapButton = [UIButton buttonWithType:UIButtonTypeCustom];
[gapButton setFrame:CGRectMake(x+3, y+10, w-6, 10)];
[gapButton setBackgroundColor:[UIColor whiteColor]];
[self.scrollView addSubview:gapButton];
Instead of this gapButton i need transparent portion in grey color so user can see black color in that portion.
Try this, I suggested it in comments. Other answer requires subclassing UIButton, which you suggested was not ideal in your situation.
UIButton *butApp = [UIButton buttonWithType:UIButtonTypeCustom];
[butApp setFrame:CGRectMake(x, y , w, h)];
//[butApp setBackgroundColor:[UIColor greyColor]]; //replace this...
[butApp setBackgroundImage:[UIImage imageNamed:#"greyWithHoleInCenter.png"]
forState:UIControlStateNormal]; //...with this
[self.scrollView addSubview:butApp];
I created a crude .png file to represent the kind of backgroundImage you might be looking for. Note that the center is clear, not white. Therefore, it should show whatever image is behind it:
Ok. Funny question. In my opinion you have to override drawRect: + drawInContext: methods by subclassing UIView class.
You also need to set the container view (the gray view) + button bg to clearColor
-(void)drawRect:(CGRect)r
{
// Let this method blank will cause drawLayer:InContext to be called
}
-(void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context
{
// Fill the bg with gray
CGContextSetFillColorWithColor(context, [UIColor grayColor].CGColor);
CGContextFillRect(context, self.bounds);
// I clear the subview frames
for (UIView * v in [self subviews]) // I do it for all subviews
{
CGContextSetBlendMode(context, kCGBlendModeClear);
CGContextFillRect(context, v.frame);
}
}
In one of my view I am adding shadow to a view. Thing is that the shadow shows white spaces on left & right edges. I want to remove these spaces.
Here is my code:
UIView *myView = [[ISTView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 35)];
myView.backgroundColor = [UIColor greyColor];
[myView.layer setShadowOffset:CGSizeMake(0.0, 5.0)];
[myView.layer setShadowOpacity:0.8];
[myView.layer setShadowRadius:2.0];
[myView.layer setShadowColor:[UIColor blackColor].CGColor];
[self.view addSubview:myView];
[myView release];
Here is my view's o/p:
If you want homogenous shadow without side effects you can draw it in graphics editor, save to png and place UIImageView with stretchable image on your view. And don't forget to set clipToBounds to NO.
UIView *myView = [[ISTView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 35)];
myView.backgroundColor = [UIColor greyColor];
myView.clipToBounds = NO;
UIImageView *shadowView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 35, 320, 10)];
shadowView.image = [UIImage imageWithName:#"my-shadow.png"];
[myView addSubview:shadowView];
[shadowView release];
[self.view addSubview:myView];
[myView release];
It would be cheaper for system to draw cached existing image above view hierarcy than calculate layer's shadow.
Use shadowPath to make the shadow larger then the view
view.layer.shadowPath = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, view.frame.size.width+30, view.frame.size.height)].CGPath;
One solution I could think of and is working also is to adjust the view's frame by 2 pixels in X position and width:
UIView *myView = [[ISTView alloc] initWithFrame:CGRectMake(-2.0, 0.0, 324.0, 35)];
But this is not a cleaner approach of doing this. If anyone has better solution, please guide.
Try this, remove the code:
[myView.layer setShadowRadius:2.0];