UITableView加载更多显示

最新推荐文章于 2021-02-22 05:41:34 发布

转载最新推荐文章于 2021-02-22 05:41:34 发布 · 766 阅读

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本文深入分析了iOS开发中实现更多功能的源代码，详细介绍了如何使用UITableView来展示数据，并通过实现加载更多功能提升用户体验。代码示例清晰易懂，适合iOS开发者学习和参考。

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源代码：源代码：http://easymorse-iphone.googlecode.com/svn/trunk/iphone.tableMore/

//
//  iphone_tableMoreViewController.m
//  iphone.tableMore
//
//  Created by wangjun on 11-3-17.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import "iphone_tableMoreViewController.h"
@implementation iphone_tableMoreViewController
@synthesize items,myTableView;
- (void)viewDidLoad {
    [super viewDidLoad];
	items=[[NSMutableArray alloc] initWithCapacity:0];
	for (int i=0; i<10; i++) {
		[items addObject:[NSString stringWithFormat:@"cell %i",i]];
	}
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (void)viewDidUnload {
	items=nil;
	self.myTableView=nil;
}
- (void)dealloc {
	[self.myTableView release];
	[items release];
    [super dealloc];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
	int count = [items count];
    return  count + 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
	static NSString *tag=@"tag";
	UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:tag];
	if (cell==nil) {
		cell=[[[UITableViewCell alloc] initWithFrame:CGRectZero
									 reuseIdentifier:tag] autorelease];
	}	
    if([indexPath row] == ([items count])) {
        //鍒涘缓loadMoreCell
		cell.textLabel.text=@"More..";
    }else {
	cell.textLabel.text=[items objectAtIndex:[indexPath row]];	
	}
    return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    

    if (indexPath.row == [items count]) {
		UITableViewCell *loadMoreCell=[tableView cellForRowAtIndexPath:indexPath];
		loadMoreCell.textLabel.text=@"loading more ...";
        [self performSelectorInBackground:@selector(loadMore) withObject:nil];
        [tableView deselectRowAtIndexPath:indexPath animated:YES];
        return;
    }
    //鍏朵粬cell鐨勪簨浠�
	
}
-(void)loadMore
{
    NSMutableArray *more; 
	more=[[NSMutableArray alloc] initWithCapacity:0];
	for (int i=0; i<10; i++) {
		[more addObject:[NSString stringWithFormat:@"cell ++%i",i]];
	}
	//鍔犺浇浣犵殑鏁版嵁
    [self performSelectorOnMainThread:@selector(appendTableWith:) withObject:more waitUntilDone:NO];
	[more release];
}
-(void) appendTableWith:(NSMutableArray *)data
{
    for (int i=0;i<[data count];i++) {
        [items addObject:[data objectAtIndex:i]];
    }
    NSMutableArray *insertIndexPaths = [NSMutableArray arrayWithCapacity:10];
    for (int ind = 0; ind < [data count]; ind++) {
        NSIndexPath    *newPath =  [NSIndexPath indexPathForRow:[items indexOfObject:[data objectAtIndex:ind]] inSection:0];
        [insertIndexPaths addObject:newPath];
    }
    [self.myTableView insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationFade];
	
}
@end