Custom UITableViewCell Not Using .xib (Most Likely Because of Flaw in init Method)

问题

I subclassed the UITableViewCell in order to customize it, but I think I'm missing something because: 1) It's not working and 2) There are a couple of things I'm confused on. Along with customizing the look of the .xib file, I also changed the backgroundView, and that part is working fine. The part that I least understand/am most confused about is the init method, so I posted that here. If it turns out that is correct, please tell me so I can post more code that may be the cause.

This is the init method, which I customized. I'm sort of confused around the "style" idea and I think I'm just returning a normal UITableViewCell with a different backgroundView. I mean, there's nothing in there that refers to the .xib or does anything but change the .backgroundView from the self:

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier wait: (float) wait fadeOut: (float) fadeOut fadeIn: (float) fadeIn playFor: (float) playFor
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        CueLoadingView* lview = [[CueLoadingView alloc] initWithFrame:CGRectMake(0, 0, 320, 53)];
        self.backgroundView = lview;

        [self setWait:wait]; // in turn edits the lview through the backgrounView pointer
        [self setFadeOut:fadeOut];
        [self setFadeIn:fadeIn];
        [self setPlayFor:playFor];
    }
    return self;
}

Other than the .xib and several setters and getters, this is the only real part of my code, that relates to retrieving a cell.

Additional Information:

1) This is my .xib, which is linked to the class.

2) This is the code that calls/creates the UITableView (the delegate/view controller):

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"CueTableCell";

    CueTableCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        cell = [[CueTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier wait:5.0 fadeOut:1.0 fadeIn:1.0 playFor:10.0];
        [cell updateBarAt:15];
    }

    return cell;
}

回答1:

The easiest way (available since iOS 5.0) to create a custom table view cell in a nib file is to use registerNib:forCellReuseIdentifier: in the table view controller. The big advantage is that dequeueReusableCellWithIdentifier: then automatically instantiates a cell from the nib file if necessary. You don't need the if (cell == nil) ... part anymore.

In viewDidLoad of the table view controller you add

[self.tableView registerNib:[UINib nibWithNibName:@"CueTableCell" bundle:nil] forCellReuseIdentifier:@"CueTableCell"];

and in cellForRowAtIndexPath you just do

CueTableCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CueTableCell"];
// setup cell
return cell;

Cells loaded from a nib file are instantiated using initWithCoder, you can override that in your subclass if necessary. For modifications to the UI elements, you should override awakeFromNib (don't forget to call "super").

回答2:

You have to load the cell from the .xib instead:

if ( cell == nil ) {
    cell = [[NSBundle mainBundle] loadNibNamed:@"CellXIBName" owner:nil options:nil][0];
}

// set the cell's properties

回答3:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"CueTableCell";

    CueTableCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        NSArray *array = [[NSBundle mainBundle] loadNibNamed:@"CueTableCell XibName" owner:self options:nil];
        // Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
        cell = [array objectAtIndex:0];
    }

    return cell;
}

来源：https://stackoverflow.com/questions/15591364/custom-uitableviewcell-not-using-xib-most-likely-because-of-flaw-in-init-metho