subclassing TTTableMessageItemCell, anything wrong? - three20

Question

I subclassing TTTableMessageItemCell, got EXC_BAD_ACCESS runtime error. Anythign wrong?
CustomTTTableSubtitleItemCell.h
#import "Three20/Three20.h"
#interface CustomTTTableSubtitleItemCell : TTTableMessageItemCell {
TTButton *_rightButton;
}
#end
CustomTTTableSubtitleItemCell.m
#import "CustomTTTableSubtitleItemCell.h"
#import "CustomTTTableSubtitleItem.h"
#import "XYDefaultStyleSheet.h"
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
static CGFloat kHPadding = 10;
static CGFloat kVPadding = 15;
#interface ButtonStyleSheet : TTDefaultStyleSheet
#end
#implementation ButtonStyleSheet
- (TTStyle*)blueToolbarButton:(UIControlState)state {
TTShape* shape = [TTRoundedRectangleShape shapeWithRadius:4.5];
UIColor* tintColor = RGBCOLOR(30, 110, 255);
return [TTSTYLESHEET toolbarButtonForState:state shape:shape tintColor:tintColor font:nil];
}
#end
#implementation CustomTTTableSubtitleItemCell
+ (CGFloat)tableView:(UITableView*)tableView rowHeightForItem:(id)item {
CustomTTTableSubtitleItem* captionedItem = item;
CGFloat maxWidth = tableView.width - kHPadding*2;
CGSize titleSize = [captionedItem.title sizeWithFont:TTSTYLEVAR(myTitleFont)
constrainedToSize:CGSizeMake(maxWidth, CGFLOAT_MAX)
lineBreakMode:UILineBreakModeWordWrap];
CGSize textSize = [captionedItem.text sizeWithFont:TTSTYLEVAR(myHeadingFont)
constrainedToSize:CGSizeMake(maxWidth, CGFLOAT_MAX)
lineBreakMode:UILineBreakModeWordWrap];
CGSize subtextSize = [captionedItem.caption sizeWithFont:TTSTYLEVAR(mySubtextFont)
constrainedToSize:CGSizeMake(maxWidth, CGFLOAT_MAX) lineBreakMode:UILineBreakModeWordWrap];
return kVPadding*2 + titleSize.height + textSize.height + subtextSize.height + kVPadding;
}
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString*)identifier {
if (self = [super initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier]) {
_item = nil;
[TTStyleSheet setGlobalStyleSheet:[[[ButtonStyleSheet alloc] init] autorelease]];
}
return self;
}
- (void)layoutSubviews {
[super layoutSubviews];
[self.detailTextLabel sizeToFit];
self.detailTextLabel.top = kVPadding;
self.textLabel.height = self.detailTextLabel.height;
//_rightButton.frame = CGRectMake(20, self.detailTextLabel.bottom + kVPadding, kImageWidth, kImageHeight);
//_rightButton.alpha = !self.showingDeleteConfirmation;
[_rightButton sizeToFit];
_rightButton.left = self.contentView.width - (_timestampLabel.width + kHPadding);
_rightButton.top = self.height/2;
}
- (id)object {
return _item;
}
- (void)setObject:(id)object {
if (_item != object) {
[super setObject:object];
CustomTTTableSubtitleItem* item = object;
//self.textLabel.textColor = TTSTYLEVAR(myHeadingColor);
// self.textLabel.font = TTSTYLEVAR(myHeadingFont);
// self.textLabel.textAlignment = UITextAlignmentRight;
// self.textLabel.contentMode = UIViewContentModeCenter;
// self.textLabel.lineBreakMode = UILineBreakModeWordWrap;
// self.textLabel.numberOfLines = 0;
//
// self.detailTextLabel.textColor = TTSTYLEVAR(mySubtextColor);
// self.detailTextLabel.font = TTSTYLEVAR(mySubtextFont);
// self.detailTextLabel.textAlignment = UITextAlignmentLeft;
// self.detailTextLabel.contentMode = UIViewContentModeTop;
// self.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap;
_rightButton = [TTButton
buttonWithStyle:#"blueToolbarButton:" title:item.rightButtonTitle];
}
}
- (void)dealloc {
TT_RELEASE_SAFELY(_rightButton);
[super dealloc];
}
#end

Answer 1

You're creating the TTButton using autorelease, while you're releasing it in your dealloc function. So both the release pool and the dealloc are trying to release your _rightButton TTButton.
in your header file, try adding:
#property (nonatomic, readonly, retain) TTButton* rightButton;
And then create the TTButton using his get function in your source file:
///////////////////////////////////////////////////////////////////////////////////////////////////
- (TTButton*)rightButton {
if (!_rightButton) {
_rightButton = [[TTButton
buttonWithStyle:#"blueToolbarButton:" title:item.rightButtonTitle] retain];
[self.contentView addSubview:rightButton];
}
return rightButton;
}
When using the rightButton, make sure to use self.rightBotton and not _rightButton, such as in the layout function (Because you need to object to be created).
self.rightButton.frame = CGRectMake(20, self.detailTextLabel.bottom + kVPadding, kImageWidth, kImageHeight);
I suggest opening the Three20UI/TTTableMessageItemCell.h & source file and trying to copy the behavior of one of the elements. That's what I did.