Can I add custom UI Elements to UIActionSheet? - objective-c

Question

I've successfully added Buttons to my UIActionSheet. I was wondering if I could add other elements, adjust the opacity, and alter the direction of the panel flying in (default comes in from below)with my UIActionSheet?
I am relatively new to iOS programming so any help would be greatly appreciated.

Answer 1

If you’re going to customize it to that degree, you’re better off just creating your own custom overlay view and adding whatever controls you need to it. Adjusting the animation direction in particular would be more trouble than it’s worth.
For more information on custom views and the view hierarchy, plus a useful section on animations (see the sidebar), check out the View Programming Guide for iOS.

Answer 2

Write implemention!
//.h
#import <UIKit/UIKit.h>
#interface UIImageActionSheet : UIActionSheet {
UIImage *titleImage;
}
-(id) initWithImage:(UIImage *)image
title:(NSString *)title
delegate:(id <UIActionSheetDelegate>)delegate
cancelButtonTitle:(NSString *)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
otherButtonTitles:(NSString *)otherButtonTitles;
#end
//.m file
#import "UIImageActionSheet.h"
#implementation UIImageActionSheet
-(id) initWithImage:(UIImage *)image
title:(NSString *)title
delegate:(id <UIActionSheetDelegate>)delegate
cancelButtonTitle:(NSString *)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
otherButtonTitles:(NSString *)otherButtonTitles{
self = [super initWithTitle:title delegate:delegate
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles,nil];
if (self) {
titleImage=image;
[titleImage retain];
UIImageView *imageView = [[UIImageView alloc] initWithImage:titleImage];
imageView.frame = CGRectZero;
for (UIView *subView in self.subviews){
if (![subView isKindOfClass:[UILabel class]]) {
[self insertSubview:imageView aboveSubview:subView];
break;
}
}
[imageView release];
}
return self;
}
- (CGFloat) maxLabelYCoordinate {
// Determine maximum y-coordinate of labels
CGFloat maxY = 0;
for( UIView *view in self.subviews ){
if([view isKindOfClass:[UILabel class]]) {
CGRect viewFrame = [view frame];
CGFloat lowerY = viewFrame.origin.y + viewFrame.size.height;
if(lowerY > maxY)
maxY = lowerY;
}
}
return maxY;
}
-(void) layoutSubviews{
[super layoutSubviews];
CGRect frame = [self frame];
CGFloat labelMaxY = [self maxLabelYCoordinate];
for(UIView *view in self.subviews){
if (![view isKindOfClass:[UILabel class]]) {
if([view isKindOfClass:[UIImageView class]]){
CGRect viewFrame = CGRectMake((320 - titleImage.size.width)/2, labelMaxY + 10,
titleImage.size.width, titleImage.size.height);
[view setFrame:viewFrame];
}
else if(![view isKindOfClass:[UIImageView class]]) {
CGRect viewFrame = [view frame];
viewFrame.origin.y += titleImage.size.height+10;
[view setFrame:viewFrame];
}
}
}
frame.origin.y -= titleImage.size.height + 2.0;
frame.size.height += titleImage.size.height + 2.0;
[self setFrame:frame];
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code.
}
*/
- (void)dealloc {
[super dealloc];
if (titleImage) {
[titleImage release];
}
}
#end

Answer 3

You have to create a custom overlay