这真的是我的最后手段,因为我绝对难倒,我只知道这是愚蠢的!Objective-C变化的变量随机值
我有一个UITableView和一个UISearchBar,用户使用搜索栏输入一个位置,然后将该位置附加到page = 1的url。然后发送给api,并返回广告列表(这已成功)。然后,用户可以滚动到UITableView的底部并拉动以加载结果的下一页(页码增加并且API再次被调用,也是成功的)。
如果我硬编码到位置变量的地方“伦敦”的广告加载尽可能多的网页罚款,但是当我使用searchBar.text(这似乎是正确的),页面1加载罚款,但页面2崩溃/网址无效。当我输出位置变量时,它不是一个字符串了,因此崩溃或者它是一些随机数据。
我已经在网上大量搜索,没有发现任何与一直停留在这2天,任何帮助,将不胜感激:)
我的代码如下:
PropertySearchTableViewController.h
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
@interface PropertySearchTableViewController : UITableViewController <UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource> {
IBOutlet UITableView *propertiesTableView;
UISearchBar *propertiesTableSearch;
NSMutableArray *propertiesArray;
NSString *location;
}
@property (nonatomic, retain) IBOutlet UISearchBar *propertiesTableSearch;
@property (nonatomic, retain) NSMutableArray *propertiesArray;
@property (nonatomic, retain) NSString *location;
- (void)loadProperties;
- (void)callback:(NSDictionary *)response;
@end
PropertySearchTableViewController.m
#import "PropertySearchTableViewController.h"
#import "JSONHandler.h"
@implementation PropertySearchTableViewController
@synthesize location;
@synthesize propertiesArray;
@synthesize propertiesTableSearch;
int page = 1;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
location = @"London";
[self.propertiesTableSearch becomeFirstResponder];
self.propertiesArray = [[NSMutableArray alloc] init];
[self loadProperties];
self.title = @"Properties";
}
- (void)loadProperties {
NSLog(@"Calling: %@", ([location isKindOfClass:[NSString class]] ? location : @"No longer a string"));
NSString *url = [NSString stringWithFormat:@"http://local.somewebsite.co.uk/adverts/?where=%@&page=%i", location, page];
JSONHandler *handler = [[JSONHandler alloc] initWithUrl:url andData:nil callbackObject:self];
[handler handleConnection];
}
- (void)callback:(NSDictionary *)response {
NSArray *properties = [response objectForKey:@"results"];
NSEnumerator *enumerator = [properties objectEnumerator];
NSDictionary* item;
while (item = (NSDictionary*)[enumerator nextObject]) {
NSDictionary *d = item;
[propertiesArray addObject:d];
}
[self.tableView reloadData];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.propertiesArray count];
}
- (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 *d = [propertiesArray objectAtIndex:indexPath.row];
cell.textLabel.text = [d objectForKey:@"ad_title"];
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
CGPoint p = scrollView.contentOffset;
CGSize s = scrollView.contentSize;
CGSize scrollSize = scrollView.bounds.size;
if((p.y+scrollSize.height) > (s.height+50)){
self.tableView.contentSize = CGSizeMake(0, s.height+50);
page++;
[self loadProperties];
}
}
//Search
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
[searchBar setShowsCancelButton:YES animated:YES];
self.tableView.scrollEnabled = NO;
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
[email protected]"";
[searchBar setShowsCancelButton:NO animated:YES];
[searchBar resignFirstResponder];
self.tableView.scrollEnabled = YES;
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
location = (NSString *) searchBar.text;
page = 1;
NSLog(@"%@", searchBar.text);
[propertiesArray removeAllObjects];
[self loadProperties];
[self.tableView reloadData];
[searchBar setShowsCancelButton:NO animated:YES];
[searchBar resignFirstResponder];
self.tableView.scrollEnabled = YES;
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[location release];
[propertiesTableSearch release];
[super dealloc];
}
@end
谢谢,我实际上并没有得到它一个正确的答案,但我已经接受了在朝着正确的方向最接近的一个:) – treeba 2010-08-19 10:00:40