Changing bounds of imageView of UITableViewCell

Question

I\'m trying to place various size images inside imageView of UITableViewCell. I get the image data asynch\'ly, create the image, set the content mode of imageView and finall

Answer 1

Create subclass of UITableViewCell:

@interface UITableViewCellSubClass : UITableViewCell

@end

@implementation UITableViewCellSubClass

- (void)layoutSubviews {
    [super layoutSubviews];
    self.imageView.frame = CGRectMake(0,4,32,32);
    self.textLabel.frame = CGRectMake(42,4,300,32);
}
@end

Answer 2

try changing the "contentMode" property of imageView to 'UIViewContentModeScaleAspectFit' or 'UIViewContentModeScaleAspectFill'

Answer 3

Done, I finally found the solution, it cost me 3 hours though =)

The solution is to change properties like bound,frame,contentMode in -(void)layoutSubviews method of the custom UITableViewCell class. The "trick" is to write layout code in this method, otherwise the code does not have any effect.

Below code did the work for me. It makes rows of the table vertically aligned.

- (void)layoutSubviews {
    [super layoutSubviews];
    self.imageView.bounds = CGRectMake(0,0,75,75);
    self.imageView.frame = CGRectMake(0,0,75,75);
    self.imageView.contentMode = UIViewContentModeScaleAspectFit;

    CGRect tmpFrame = self.textLabel.frame;
    tmpFrame.origin.x = 77;
    self.textLabel.frame = tmpFrame;

    tmpFrame = self.detailTextLabel.frame;
    tmpFrame.origin.x = 77;
    self.detailTextLabel.frame = tmpFrame;

}

Answer 4

"UIViewContentModeCenter || UIViewContentModeRedraw" is equivalent to 1. It's also not a bitfield. You want UIViewContentModeCenter.

UITableViewCell.imageView is managed by the cell. If you want custom layout, try adding a view to contentView (I'm guessing what you mean by "centered in a 75x75 area"):

UIImageView * iv = [[[UIImageView alloc] initWithImage:image] autorelease];
iv.frame = (CGRect){{0,0},{75,75}};
iv.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin| UIViewAutoresizingFlexibleRightMargin;
iv.contentMode = UIViewContentModeScaleAspectFit;
[holder.contentView addSubview:iv];

Answer 5

So the problem with UITableViewCell's is that you have no control over the size of the built-in objects (namely imageView, contentView, accessoryView, backgroundView). When the table changes, your customizations get trampled over.

You can, as Behlul pointed out, force the sizes to be correct by using layoutSubviews, but the problem with that is that layoutSubviews is called every time the table scrolls. That is a lot of unnecessary re-layout calls.

An alternate, method is to add all of your content to the contentView. Similarly if you are customizing the background, you can create a transparent backgroundView and add your custom background view (eg myBackgroundView) as a subview of backgroundView.

This way you can place and size your items how you want them.

The down side is the stock messages are no longer received from the accessory or image views. You just have to create you own.

Hope that helps!

// This code is not tested
// MyCustomTableViewCell
- (id) init{
    self = [super initWithStyle: UITableViewCellStyleDefault reuseIdentifier:@"MyReuseIdentifier"];
    if(self){
        //image view
        my_image_view = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"default_image.png"]] retain];
        [my_image_view setFrame:CGRectMake(10,10,30,30)];
        [self.contentView addSubview:my_image_view];

        //labels
        my_text_label = [[[UILabel alloc] initWithFrame:CGRectMake(50,10,100,15)] retain];
        [self.contentView addSubview:my_text_label];
        //set font, etc

        //detail label
        my_detail_label = [[[UILabel alloc] initWithFrame:CGRectMake(50,25,100,15)] retain];
        [self.contentView addSubview:my_detail_label];
        //set font, etc

        //accessory view
        //Whatever you want to do here
        //attach "accessoryButtonTapped" selector to button action

        //background view
        UIView* background_view = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 50)] autorelease];
        [background_view setBackgroundColor:[UIColor greenColor]];
        background_view.layer.cornerRadius = 17;
        background_view.layer.borderWidth = 3;
        background_view.layer.borderColor = [UIColor whiteColor].CGColor;

        [self setBackgroundView:[[[UIView alloc] init] autorelease]];
        [self.backgroundView addSubview:background_view];
    }

    return self;
}

- (void) setLabelText: (NSString*) label_text{
    [my_text_label setText:label_text];
}

- (void) setDetailText: (NSString*) detail_text{
    [my_detail_label setText: detail_text];
}

- (void) accessoryButtonTapped{
    //call table view delegate's accessoryButtonTappedForRowWithIndexPath method
}