无法重新加载IOS7中的表格视图
对于IOS开发来说，我是一个相当新的东西，并且一直在努力。 我想从我的服务器显示用户有电话列表，但tableview不显示项目。 我已经从服务器获得数据，我认为UItableView的设置是正确的。 这是我的代码：
STKPhoneHolderViewController.h
#import <UIKit/UIKit.h> #import "STKSimpleHttpClientDelegate.h" @interface STKPhoneHolderViewController : UITableViewController <UITableViewDataSource, STKSimpleHttpClientDelegate> @property (strong, nonatomic) IBOutlet UITableView *phoneTable; @property (strong, nonatomic) NSMutableArray *phoneArray; @end STKPhoneHolderViewController.m
@implementation STKPhoneHolderViewController - (id)initWithStyle:(UITableViewStyle)style { self = [super initWithStyle:style]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Uncomment the following line to preserve selection between presentations. // self.clearsSelectionOnViewWillAppear = NO; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. // self.navigationItem.rightBarButtonItem = self.editButtonItem; self.phoneTable.dataSource = self; self.phoneArray = [[NSMutableArray alloc]init]; [self loadPhoneList]; } #pragma mark - Table view data source - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [self.phoneArray count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"PhoneCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } STKPhoneHolder *phoneHolder = [self.phoneArray objectAtIndex:indexPath.row]; [cell.textLabel setText:phoneHolder.userName]; return cell; } #pragma Custom method - (void) loadPhoneList { self.phoneArray = [[NSMutableArray alloc]init]; STKSimpleHttpClient *client = [[STKSimpleHttpClient alloc]init]; client.delegate = self; NSString *userId = @"your_id_h"; NSString *sUrl = [NSString stringWithFormat:@"%@%@?userid=%@", MOBILE_API_URL, PHONEHOLDER_URI, userId]; [client send:sUrl data:@""]; } #pragma STKSimpleHttpClientDelegate -(void) complete:(STKHttpResult*) result { if (result.ok != YES){ [STKUtility alert:result.message]; return; } self.phoneArray = (NSMutableArray*)result.result; for (STKPhoneHolder *holder in self.phoneArray) { NSLog(@"%@", [holder description]); } [self.phoneTable reloadData]; NSLog(@" isMainThread(%d)", [NSThread isMainThread] ); } @end
STKSimpleHttpClient.m
#import "STKSimpleHttpClient.h" #import "STKSimpleHttpClientDelegate.h" @implementation STKSimpleHttpClient NSMutableData *responseData; STKHttpResult *httpResult; void (^completeFunction)(STKHttpResult *); - (void) send:(NSString*)url data:(NSString*)data { httpResult = [[STKHttpResult alloc]init]; dispatch_async(dispatch_get_main_queue(), ^{ if ( data == nil) return; //Get request object and set properties NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL: [NSURL URLWithString: url]]; //set header for JSON request and response [urlRequest setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"]; [urlRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"]; //set http method to POST [urlRequest setHTTPMethod:@"POST"]; //set time out [urlRequest setTimeoutInterval:20]; NSData *body = [data dataUsingEncoding:NSUTF8StringEncoding]; //set request body urlRequest.HTTPBody = body; //connect to server NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self]; if (conn==nil){ //Do something } }); } #pragma mark - NSURLConnection Delegate - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // A response has been received, this is where we initialize the instance var you created // so that we can append data to it in the didReceiveData method // Furthermore, this method is called each time there is a redirect so reinitializing it // also serves to clear it responseData = [[NSMutableData alloc] init]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to the instance variable you declared [responseData appendData:data]; } - (NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse*)cachedResponse { // Return nil to indicate not necessary to store a cached response for this connection return nil; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // The request is complete and data has been received // You can parse the stuff in your instance variable noow NSError *error; NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error]; BOOL ok = [[json objectForKey:@"ok"] boolValue]; NSString *message = [json objectForKey:@"message"]; if (ok == NO) { [httpResult setError:message]; } else { [httpResult setSuccess:[json objectForKey:@"result"]]; } if (self.delegate !=nil) { [self.delegate complete:httpResult]; } responseData = nil; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { // The request has failed for some reason! // Check the error var if (self.delegate !=nil) { [self.delegate complete:[httpResult setError:@"Connection failed."]]; } }
STKPhoneHolder.m
#import <Foundation/Foundation.h> @interface STKPhoneHolder : NSObject @property NSString *deviceId; @property NSString *userId; @property NSString *userName; @property NSString *msn; - (id) initWithDeviceId:(NSString*)aDeviceId userId:(NSString*)aUserId userName:(NSString*)aUserName msn:(NSString*)aMsn; @end
日志：
2013-12-17 16:14:23.447 [5323:70b] { deviceId = 11111; email = ""; msn = 11111111; role = ""; userId = aaaaaa; userName = "Joshua Pak"; } 2013-12-17 16:14:23.448 [5323:70b] { deviceId = 22222; email = ""; msn = 2222222; role = ""; userId = bbbbb; userName = "Jasdf Pak"; } 2013-12-17 16:14:23.449 Stalker[5323:70b] isMainThread(1)
我可以看到日志打印phoneArray两个手机在'完整'的方法，但tableview只是显示“没有logging”。 即使我调用reloadData方法，tableview也不会再显示。 我确保在debugging模式下调用[self.phoneTable reloadData]。 我还需要做些什么？
尝试在主线程中调用reloadData
#pragma STKSimpleHttpClientDelegate -(void) complete:(STKHttpResult*) result { if (result.ok != YES){ [STKUtility alert:result.message]; return; } self.phoneArray = (NSMutableArray*)result.result; for (STKPhoneHolder *holder in self.phoneArray) { NSLog(@"%@", [holder description]); } dispatch_async(dispatch_get_main_queue(), ^{ [self.phoneTable reloadData]; } }
或者你可以使用performSelectorOnMainThread
[self.phoneTable performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];
我猜STKSimpleHttpClient类在不同的线程上调用完全的委托函数，所有的用户界面交互都假设从主线程调用。
试试这个代码，看看你是从完整的委托函数中的哪个线程
NSLog(@" isMainThread(%d)", [NSThread isMainThread] );
检查这个。 在从Web服务获取信息之前，代码是否加载了tableview？ 如果是的话再写一下[tableview Reload]; 在Web服务信息获取过程旁边。 这将有所帮助
没有必要指定部分的数量，但您可能需要使用以下代码：
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; }
我看到你正在使用一个表视图控制器，它已经有一个tableView引用self.tableView 。
就像@ rdelmar说的那样，你可以使用那个引用而不是你的phoneTable：
[[self tableView] setDataSource:self]; [[self tableView] setDelegate:self]; [[self tableView] reloadData];