给TableView添加背景
iPhone SDK提供了默认的几个TableView样式,但是如果想提供更个性化的样式就需要自己定义。 比如添加背景
如上图的样子。 其实自定义table view的样子很简单,无非就是把table view和table view cell的背景变成透明的,然后在指定视图和cell的背景图片(当然,也可以指定table view的背景图片)
-
-
@interface MainViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
-
{
-
UITableView *theTableView;
-
}
-
先建立Controller,注意是继承自UIViewController而不是UITableViewController
实现类
-
-
- (id)init
-
{
-
if (self = [super init])
-
{
-
self.view = [[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease];
-
-
// Setup the background
-
UIImageView *background = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"background.png"]];
-
[self.view addSubview:background];
-
[background release];
-
-
// Create table view
-
theTableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 11, 320, 460) style: UITableViewStylePlain];
-
[theTableView setDelegate:self];
-
[theTableView setDataSource:self];
-
-
// This should be set to work with the image height
-
[theTableView setRowHeight:68];
-
-
// Transparent, so we can see the background
-
[theTableView setBackgroundColor:[UIColor clearColor]];
-
[theTableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
-
[theTableView setIndicatorStyle:UIScrollViewIndicatorStyleWhite];
-
-
[self.view addSubview:theTableView];
-
-
}
-
return self;
-
}
-
代码中的注释已经很清楚了。 先设置视图的背景,再设定table view的背景
再看另外一断代码,设置了cell的背景,注意,这里面使用了自定义的cell类CustomCell
-
-
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
-
{
-
CustomCell *cell= [[[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil] autorelease];
-
-
// Default to no selected style and not selected
-
cell.selectionStyle = UITableViewCellSelectionStyleNone;
-
-
// Set the image for the cell
-
[cell setTheImage:[UIImage imageNamed:[NSString stringWithFormat:@"Arrows%d.png", indexPath.row + 1]]];
-
-
return cell;
-
}
-
我们再看看如何定义自定义的cell
-
-
#import <UIKit/UIKit.h>
-
-
@interface CustomCell : UITableViewCell
-
{
-
UIImageView *image;
-
}
-
-
- (void) setTheImage:(UIImage *)icon;
-
-
@end
-
再看实现类
-
-
#import "CustomCell.h"
-
-
@implementation CustomCell
-
-
/*—————————————————————————
-
*
-
*————————————————————————–*/
-
{
-
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])
-
{
-
// Cells are transparent
-
[self.contentView setBackgroundColor:[UIColor clearColor]];
-
}
-
-
return self;
-
}
-
-
/*—————————————————————————
-
*
-
*————————————————————————–*/
-
- (void) setTheImage:(UIImage *) icon
-
{
-
// Alloc and set the frame
-
image = [[UIImageView alloc] initWithImage:icon];
-
image.frame = CGRectMake(0, 0, 286, 68);
-
-
// Add subview
-
[self.contentView addSubview:image];
-
}
-
-
/*—————————————————————————
-
*
-
*————————————————————————–*/
-
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
-
{
-
[super setSelected:selected animated:animated];
-
if (selected == YES)
-
image.alpha = .5;
-
else
-
image.alpha = 1;
-
}
-
-
/*—————————————————————————
-
*
-
*————————————————————————–*/
-
- (void)dealloc
-
{
-
[image release];
-
[super dealloc];
-
}
-
-
@end
-