iPhone開發學習筆記003——UITableViewCell內容自適應高度

此篇使用前一篇http://www.bkjia.com/kf/201202/120764.html
的執行個體，只是將對應的Cell.xib介面換成如下所示：

然後，oneViewController中添加屬性：dataArray，即 *.h中添加@property (nonatomic,retain)NSArray *dataArray;
*.m中添加：@synthesize dataArray;
oneViewController.m中的部分代碼如下：

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [self.dataArraycount];
}

 

// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:

// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)

 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

   

    static NSString *CustomCellIdentifier = @"CellIdentifier";

    UITableViewCell *cell = [tableView

dequeueReusableCellWithIdentifier: CustomCellIdentifier];

    if (cell ==nil) {

        NSArray *nib = [[NSBundlemainBundle]loadNibNamed:@"Cell"

owner:selfoptions:nil];

        //        if ([nib count] > 0) {

        //            cell = self.tableViewCell;

        //        } else {

        //            NSLog(@"failed to load CustomCell nib file!");

        //        }

        cell = [nib objectAtIndex:0];

    }

    NSUInteger row = [indexPathrow];

   

NSLog(@"++++++++++++++ jonesduan %s, cell row:%d", __func__, row);

   

    UILabel *cellLabel = (UILabel *)[cellviewWithTag:1];

    cellLabel.text = [NSStringstringWithFormat:@"cell index %d:", row];

   

    UILabel *contentLabel = (UILabel *)[cellviewWithTag:2];

   

    NSDictionary *rowData = [self.dataArrayobjectAtIndex:row];

   

    //設定自動行數與字元換行 

    [contentLabel setNumberOfLines:0]; 

    contentLabel.lineBreakMode =UILineBreakModeWordWrap;

   

    UIFont *font = [UIFontfontWithName:@"Arial"size:12];

   

   //設定一個行高上限 

    //CGSize size = CGSizeMake(100 /*nameLabel.frame.size.width*/, 2000);

    CGSize size = CGSizeMake(100,2000); // 這裡不一定就得是100和2000，具體數字是自已試出來的，這裡的修改會影響下面計算出來的labelsize ，望牛人指教此處兩個參數應該如何確定具體值，即能夠通過計算一次得出應該設定的值？？？

    NSLog(@"nameLabel(x, y, witdh, height) = (%f, %f, %f, %f)", contentLabel.frame.origin.x, contentLabel.frame.origin.y, contentLabel.frame.size.width, contentLabel.frame.size.height);

    NSLog(@"size(width, height) = (%f, %f)", size.width, size.height);

   

    NSString *labelText = [rowDataobjectForKey:@"Name"];

   

   //計算實際frame大小，並將label的frame變成實際大小

    CGSizelabelsize = [labelTextsizeWithFont:fontconstrainedToSize:sizelineBreakMode:UILineBreakModeWordWrap];

    NSLog(@"labelsize(width, height) = (%f, %f)", labelsize.width, labelsize.height);

   

    [contentLabel setFrame:CGRectMake(contentLabel.frame.origin.x, contentLabel.frame.origin.y, contentLabel.frame.size.width, labelsize.height)];

    NSLog(@"==> nameLabel(x, y, witdh, height) = (%f, %f, %f, %f)\n\r", contentLabel.frame.origin.x, contentLabel.frame.origin.y, contentLabel.frame.size.width, contentLabel.frame.size.height);

   

    //nameLabel.adjustsFontSizeToFitWidth = FALSE;

    //nameLabel.textAlignment = UITextAlignmentLeft;

   

    contentLabel.text = [rowDataobjectForKey:@"Name"];

    [contentLabelsizeToFit];

   

    return cell;

}

 

- (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

   

    UITableViewCell *cell = [selftableView:tableViewcellForRowAtIndexPath:indexPath];

    //NSUInteger row = [indexPath row];

    //NSDictionary *rowData = [self.computers objectAtIndex:row];

   

    UILabel *nameLabel = (UILabel *)[cellviewWithTag:2];

    NSLog(@"==> nameLabel.frame.size.height = %f", nameLabel.frame.size.height);

   

    returnBASE_HEIGHT_FOR_ROW + ((nameLabel.frame.size.height -LABEL_DEFAULT_HEIGHT) > 0 ? (nameLabel.frame.size.height - LABEL_DEFAULT_HEIGHT) : 0);

}

 

 

 

- (void)didReceiveMemoryWarning

{

    [superdidReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.

}

 

#pragma mark - View lifecycle

 

- (void)viewDidLoad

{

    [superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

#if 1   

    [labelsetBackgroundColor:[UIColorwhiteColor]];

    [self.buttonsetTitleColor:[UIColorgreenColor]forState:UIControlStateNormal];

    [self.buttonsetTitleColor:[UIColororangeColor]forState:UIControlStateHighlighted];

#else

    [label setBackgroundColor:[UIColor whiteColor]];

    [button setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];

    [button setTitleColor:[UIColor orangeColor] forState:UIControlStateHighlighted];   

#endif  

   

    NSDictionary *row1 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action1 Action1 Action1！",@"Name", @"Location1", @"Color",nil];

    NSDictionary *row2 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action2 Action2 Action2 Action2 Action2 Action2 Action2 Action2 Action2! End!",@"Name",@"Location2", @"Color",nil];

    NSDictionary *row3 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action3",@"Name", @"Location3",@"Color",nil];

    NSDictionary *row4 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action4 Action4!",@"Name", @"Location4", @"Color",nil];

    NSDictionary *row5 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action5Action5Action5Action5Action5+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+End!",@"Name",@"Location5", @"Color",nil];

    NSDictionary *row6 = [[NSDictionaryalloc]initWithObjectsAndKeys:

 @"Action6 Action6 Action6 Action6 Action6! End!",@"Name", @"Location6", @"Color",nil];

    NSArray *array = [[NSArrayalloc]initWithObjects:row1, row2,

                      row3, row4, row5, row6,nil];

    self.dataArray = array;  // 初始化dataArray,後面要獲得裡面的NSDictionary內容放在Table View Cell中第二個label中顯示。

    [row1 release];

    [row2 release];

    [row3 release];

    [row4 release];

    [row5 release];

    [row6 release];

    [array release];

   

}

修改好後，運行，效果如下：




附件：

http://www.bkjia.com/uploadfile/2012/0225/20120225115428680.rar
摘自 Code Heaven