任何人都可以向我提供可点击的tableview的JSON字符串的任何好例子吗?
我从服务器获取json字符串(已经工作),我需要用tableview发布视图。但它应该能够点击并给出该行的消息。 Json结构:
{ "messages":[{
"id": ....,
"msg":....,
"special":...,
"comments":...}]}
有什么好的例子吗?
答案 0 :(得分:0)
我发现这段视频非常适合学习。
http://www.youtube.com/watch?v=9MEnvlqP-wU
同时检查我的一些问题,我问了很多关于JSON但是视频是向前发展的好方法。
更多链接:)
答案 1 :(得分:0)
以下是您尝试执行的操作的代码。如果您愿意,可以修改为以不同方式查看,如果这是正确的,或者您正在寻找显示消息的其他方式,请允许我。
//
// MyViewController.h
// Test
//
// Created by Syed Arsalan Pervez on 2/22/13.
// Copyright (c) 2013 SAPLogix. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface MyViewController : UITableViewController
{
NSArray *_messages;
}
@end
//
// MyViewController.m
// Test
//
// Created by Syed Arsalan Pervez on 2/22/13.
// Copyright (c) 2013 SAPLogix. All rights reserved.
//
#import "MyViewController.h"
@interface MyViewController ()
@end
@implementation MyViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *JSONString = @"{\"messages\":[{\"id\":\"1\",\"msg\":\"Message Line\",\"special\":\"Special Line\",\"comments\":\"Comments Line\"},{\"id\":\"2\",\"msg\":\"Message Line\",\"special\":\"Special Line\",\"comments\":\"Comments Line\"}]}";
NSError *error = nil;
NSDictionary *JSONObj = [NSJSONSerialization JSONObjectWithData:[JSONString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingAllowFragments error:&error];
if (!error)
{
_messages = [[JSONObj valueForKey:@"messages"] retain];
}
else
{
NSLog(@"Error: %@", error);
}
[self.tableView reloadData];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return [_messages count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
NSDictionary *_message = [_messages objectAtIndex:indexPath.section];
switch (indexPath.row)
{
case 0:
cell.textLabel.text = [_message valueForKey:@"msg"];
break;
case 1:
cell.textLabel.text = [_message valueForKey:@"special"];
break;
case 2:
cell.textLabel.text = [_message valueForKey:@"comments"];
break;
}
_message = nil;
return cell;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSDictionary *_message = [_messages objectAtIndex:section];
return [NSString stringWithFormat:@"Message %@", [_message valueForKey:@"id"]];
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSDictionary *_message = [_messages objectAtIndex:indexPath.section];
NSMutableString *string = [NSMutableString new];
[string appendFormat:@"Message %@: ", [_message valueForKey:@"id"]];
switch (indexPath.row)
{
case 0:
[string appendString:[_message valueForKey:@"msg"]];
break;
case 1:
[string appendString:[_message valueForKey:@"special"]];
break;
case 2:
[string appendString:[_message valueForKey:@"comments"]];
break;
}
_message = nil;
[[[[UIAlertView alloc] initWithTitle:@"Alert" message:string delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil] autorelease] show];
[string release];
}
- (void)dealloc
{
[_messages release];
[super dealloc];
}
@end
输出:
答案 2 :(得分:-1)
您必须使用库解析该JSON响应,例如SBJson,然后从您的数据创建数组或字典,并使用此字典和数组填充您的tableview。
如果你能提供你的json响应,我可以帮助你解析它。
我是addind一些显示解析的代码片段:
SBJsonParser *jsonParser = [SBJsonParser new];
NSDictionary *jsonData = (NSDictionary *) [jsonParser objectWithString:responseData error:nil];
//to display driver name in drop down
NSArray * messagesArray = [[NSArray alloc]init];
messagesArray= [jsonData objectForKey:@"messages"];
for(int i=0;i<[driverNameArray count];i++)
{
NSDictionary *tempDictionary = [messagesArray objectAtIndex:i];
if([tempDictionary objectForKey:@"id"]!=nil)
{
[idAry addObject:[tempDictionary objectForKey:@"id"]];
}
if([tempDictionary objectForKey:@"msg"]!=nil)
{
[msgAry addObject:[tempDictionary objectForKey:@"msg"]];
}
if([tempDictionary objectForKey:@"special"]!=nil)
{
[specialAry addObject:[tempDictionary objectForKey:@"special"]];
}
if([tempDictionary objectForKey:@"comments"]!=nil)
{
[commentsAry addObject:[tempDictionary objectForKey:@"comments"]];
}
}
我使用过的所有数组commentsAry,specialAry,msgAry,idAry保存你的数据,并可用于填充tableview。