i have created a view in textfield should characters method like this. when i change my view from portrait to landscape my view width is not changing.
viewForautoCompleteTableView = [[UIView alloc]initWithFrame:CGRectMake(30, 120, 212, 100)];
viewForautoCompleteTableView.autoresizingMask=UIViewAutoresizingFlexibleWidth;
[self.view addSubview:viewForautoCompleteTableView];
viewForautoCompleteTableView.layer.borderWidth=1;
viewForautoCompleteTableView.layer.borderColor=[UIColor grayColor].CGColor;
thank you
Note that :
On Rotation, self.view.frame size does not change but self.view.bounds does , and bounds represent correct values with respect to current Interface Orientation.
There are two points that you have to check
. Is your view( viewForautoCompleteTableView) allocated ?
. If you want to change the width while rotation then you have to change the width of your view in didRotateFromInterfaceOrientation:UIInterfaceOrientation)fromInterfaceOrientation method
-(void)didRotateFromInterfaceOrientation: (UIInterfaceOrientation)fromInterfaceOrientation{
// put the condition to check for your orientation type i.e. portrait or landscape
CGSize newSize= CGSizeMake(newWidth,height); // setting new width here
CGRect viewFrame=viewForautoCompleteTableView.frame;
viewFrame. size = newSize;
viewForautoCompleteTableView.frame=textFrame; // provide some animation if required
}
Note:- Please make sure your view is allocated
Related
According to the official doc on UIView about the contentMode property:
The content mode specifies how the cached bitmap of the view’s layer is adjusted when the view’s bounds change
What's defined the content in this definition? Is it a sub view or when we have define a background color for a view for example.
My very first guess was that it should apply at least for the subviews in a view, but for example the following code snippet will not give me the expected result when playing with the UIViewContentModeCenter tag:
UIView* redView = [[UIView alloc] initWithFrame:CGRectMake(80, 80, 150, 200)];
redView.contentMode = UIViewContentModeCenter;
redView.backgroundColor = [UIColor redColor];
UIView* greenView = [[UIView alloc] initWithFrame:redView.bounds];
greenView.backgroundColor = [UIColor greenColor];
[redView addSubview:greenView];
redView.frame = CGRectInset(redView.frame, -5, -5);
[self.view addSubview:redView];
I have just set up a redView that will include a greenView. I have also set-up the content mode of the redview to UIViewContentModeCenter - why in the code I wrote the greenView is not centered when I change the frame of its parent? isn't what UIViewContentModeCenter is supposed to do?
Thanks for clarifying!
Ps: You can easily test the above code in the loadView of a simple view controller template project.
From the documentation:
The content mode specifies how the cached bitmap of the view’s layer
is adjusted when the view’s bounds change.
For an image view, this is talking about the image. For a view that
draws its content, this is talking about the drawn content. It does
not affect the layout of subviews.
You need to look at the autoresizing masks in place on the subviews.
Content mode is a red herring here. If you can't achieve the layout
you need using autoresizing masks, then you need to implement
layoutSubviews and calculate the subview positions and frames
manually.
from jrturton's answer to: https://stackoverflow.com/a/14111480/1374512
First read about Content Modes here
In your example you change the frame of the red view. That will invoke layoutSubviews on the view which will reposition the green view according to the layout constraints or autoresizing masks. You haven't specified any. So the frame of the green view will stay the same.
The content mode specifies how the view's layer should update when resizing. Depending on the content mode drawRect will be called or not.
You can test the effect of the different content modes with the following example:
Add a UIView subclass, that draws a circle using this drawRect implementation:
- (void)drawRect:(CGRect)rect
{
// Drawing code
NSLog(#"drawRect %#", NSStringFromCGRect(rect));
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextAddEllipseInRect(ctx, self.bounds);
[[UIColor redColor] setFill];
CGContextFillPath(ctx);
}
In the view controller create and add the circle view:
CircleView* circleView = [[CircleView alloc] initWithFrame:CGRectMake(10, 10, 20, 20)];
circleView.contentMode = UIViewContentModeCenter; // <- try different modes here
[self.view addSubview:circleView];
Now lets animate the frame and see what happens:
dispatch_async(dispatch_get_main_queue(), ^{
[UIView animateWithDuration:5 animations:^{
circleView.frame = CGRectMake(10, 10, 100, 200);
}];
});
I'm doing that asynchronously to force CoreGraphics to draw the view at least one time with the original frame.
When you don't set the content mode you end up with a blurry circle, because it just scales up without redrawing. UIViewContentModeCenter makes the small circle stay at the center - also no redraw needed. UIViewContentModeRedraw makes the view draw the view again with the new frame. Actually that happens before the animation starts.
Note that the content mode can affect the drawing performance.
I've UIViewController with navigation bar and scrollview within it.
When scrollview scrolls down I hide navigation bar and set bounds for scrollview to fit free space.
self.navigationController.navigationBarHidden = YES;
[scrollView setBounds:CGRectMake(0, 0, 320, 411)];
Height is 411 cos there is also UITabBarController.
But scrollview doesn't fit whole view. When I check it's frame it says that frame = (0 22; 320 411); How could I fix that?
I've tried to use setFrame function instead of setBounds. Also I dont need to resize it's content I need to change its frame.
i think you use setFrame and also setContentSize if needed here...
its may be happen because off its content size not manage after your scrollview bounds are changed...
hope this help you....
:)
I believe you need to set the frame of the scrollview.
scrollView.frame = CGRectMake(0, 0, 320, 411);
The bounds is a coordinate system in relation to the view and not its containing view.
Try to use setFrame function.
[scrollView setFrame:CGRectMake(0, 0, 320, 411)];
I took a regular UITabBar and changed it's background image to a custom one which has a lower height, so I changed the height of the frame.
At first what I got is a blank space below the tab bar. so I changed the origin of the frame too. But now the blank space has moved up above the tab bar and this is the result:
And this is the code declaring the tab bar in the AppDelegate:
self.tabContoller = [[UITabBarController alloc] init];
//customizing the tabbar
UIImage * tabBackgroundImage = [UIImage imageNamed:#"tabBarBg.png"];
self.tabContoller.tabBar.backgroundColor = [UIColor colorWithRed:245.f/255.f green:245.f/255.f blue:245.f/255.f alpha:255.f/255.f];
self.tabContoller.tabBar.backgroundImage = tabBackgroundImage;
//setting the tabbar height to the correct height of the image
CGRect tabR = self.tabContoller.tabBar.frame;
CGFloat diff = tabR.size.height - tabBackgroundImage.size.height;
tabR.size.height = tabBackgroundImage.size.height;
tabR.origin.y += diff;
self.tabContoller.tabBar.frame = tabR;
I guess that the problem is that the ViewControllers draw themselves above a constant space which is the height of the regular tab bar. Is there any way to change it?
Change your UITabBarController's subviews to a full-sized frame, this worked for me:
[[yourTabBarController.view.subviews objectAtIndex:0] setFrame:CGRectMake(0, 0, 320, 480)];
Try creating your own class extending from UITabBar and use this function:
- (CGSize)sizeThatFits:(CGSize)size {
CGSize auxSize = size;
auxSize.height = 54; // Put here the new height you want and that's it
return auxSize;
}
This will resize the UITabBar to the size you want. Simple and easy.
If changing the frame like #JoaT mentioned doesn't work make sure the view controller's view has the correct autoresizing mask set.
This SO link may be helpful.
I tried by changing the height and origin of tabbar, for me it worked properly.You can try by increasing the height of your viewcontroller.
I've a screen in an app I'm coding structured like this:
View
ScrollView
View
label 1
label 2
label 3
View
UIImageView
WebView
When loaded it adds some html string into the Web View and as the whole content (labels,image,html content) is longer than the screen height, I would like to allow the screen to scroll down/up when user is reading content. This is why I added the SrollView but nothing scroll!
I also did is scroll_view.contentSize = [self.view bounds].size; but it didn't work
Any idea on how to do this ?
Thx in advance for helping,
Stephane
By default UIScrollView is set a contentSize equal to its frame size. If you want it to be scrollable, you have to explicitly set the contentSize.
scrollView.contentSize = CGSizeMake(_width, _height);
Mostly you won't be knowing the actual contents size while you create the scroll view. You can assign the contentSize after adding the UIWebview(as web view is the last view in your scroll view). You can do it like this,
// Add other views to scrollView
// Create and configure webView
[scrollView addSubview:webView];
float _width = scrollView.contentSize.width; // No change in width
float _height = CGRectGetMaxY(webView); // Returns (webView.frame.origin.y + webView.frame.size.height)
scrollView.contentSize = CGSizeMake(_width, _height);
Below code u observe Here "Height" declare Dynamically as your Requirement
EXample :
if([Myarray length]>25)
{
myString = [myString stringByAppendingFormat:#"<tr><th align=\"left\">%#</tr>",str_owes ];
height += 50;
}
webview.frame=CGRectMake(25, 153, 420, height);
[webview loadHTMLString:myString baseURL:nil];
scrollview.contentSize=CGSizeMake(0, webview.frame.origin.y+webview.frame.size.height+50);
You need to set the UIScrollView's contentSize to be the size of the two views + the UIWebView combined.
You will also need to make sure that the UIWebView if of the right size and then turn scrolling off, as you may get scrolling issues otherwise (one scroll view inside another).
More info: http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIScrollView_Class/Reference/UIScrollView.html
hello every buddy
i want to make horizontal image scroller at bottom view and in the back of side big Image View. i don't know how to make image horizontal scroll.
Place the image view inside a scroll view whose horizontal content size is greater than its frame width, i.e.
UIScrollView *scrollView = [[UIScrollView alloc] init];
scrollView.frame = CGRectMake(0, 0, 100, 100);
scrollView.contentSize = CGSizeMake(300, 100);
[scrollView addSubview:imageView];
You should use contentSize property of the UIScrollView to set its content size according to your requirement and then set the property showsHorizontalScrollIndicator to YES and showsVerticalScrollIndicator to NO . But you don't require to set these two if you set frame and content size properly. Like if _myScrollView.frame.height and _myScrollView.contentSize.height is same then you don't need to set horizontal and vertical scroll. Its vertical scroll will automatically be disabled.
you can use scroll view with page control for a horizontal slideshow. follow the tutorial it might help you
http://www.edumobile.org/iphone/iphone-programming-tutorials/pagecontrol-example-in-iphone/