我想从 iPhone 应用程序中的 Web 服务将数据加载到表格 View 。所有输出都正常工作，但我的表不包含任何数据。它是空的。
我没有发现应用程序有任何错误。为什么 tableview 不从 Web 服务加载数据？
ScoreClass.h
@interface ScoreClass : NSObject {
IBOutlet NSInteger *ScoreID;
IBOutlet NSInteger *UserScore;
IBOutlet NSInteger *GameID;
IBOutlet NSString *MacID;
IBOutlet NSString *NickName;
IBOutlet Boolean *IsDeleted;
IBOutlet NSDate *CreatedOn;
IBOutlet NSDate *ModifiedOn;
NSMutableArray *ScoreList;
}
@property(assign, readwrite) NSInteger *ScoreID;
@property(assign, readwrite) NSInteger *UserScore;
@property(assign, readwrite) NSInteger *GameID;
@property(nonatomic, retain) NSString *MacID;
@property(nonatomic, retain) NSString *NickName;
@property(nonatomic, assign) Boolean *IsDeleted;
@property(nonatomic, retain) NSDate *CreatedOn;
@property(nonatomic, retain) NSDate *ModifiedOn;
@property(retain, readwrite) NSMutableArray *ScoreList;
@end
ScoreClass.m
#import "ScoreClass.h"
@implementation ScoreClass
@synthesize ScoreID, UserScore, GameID, MacID, NickName, IsDeleted,CreatedOn, ModifiedOn,ScoreList;
-(id)init {
[super init];
MacID = [NSString stringWithFormat:@""];
NickName= [NSString stringWithFormat:@""];
return self;
}
-(void) dealloc{
[MacID release];
[NickName release];
[super dealloc];
}
@end
ScoreWebService.h
#import <UIKit/UIKit.h>
#import "ScoreClass.h"
@interface ScoreWebService : UIViewController {
// Request
NSString *address;
NSString *xmlNamespace;
NSString *operation;
NSString *parameters;
NSMutableString *inComeValue;
// Connection
BOOL recordResults;
BOOL connectionFinished;
// Xml Parsing
NSMutableString *soapResults;
NSMutableData *webData;
NSXMLParser *xmlParser;
ScoreClass *score;
NSMutableArray *ScoreList;
}
@property(nonatomic, retain) NSString *address;
@property(nonatomic, retain) NSString *xmlNamespace;
@property(nonatomic, retain) NSString *operation;
@property(nonatomic, retain) NSString *parameters;
@property(nonatomic, retain) NSMutableString *inComeValue;
@property(retain, readwrite) NSMutableArray *ScoreList;
@property(nonatomic, retain) ScoreClass *score;
@end
ScoreWebService.m
#import "ScoreWebService.h"
@implementation ScoreWebService
@synthesize operation, parameters, address, xmlNamespace, inComeValue, score;
@synthesize ScoreList;
-(id)init {
[super init];
address = [NSString stringWithFormat:@""];
xmlNamespace = [NSString stringWithFormat:@""];
operation = [NSString stringWithFormat:@""];
parameters = [NSString stringWithFormat:@""];
inComeValue = [NSString stringWithFormat:@""];
score = [[ScoreClass alloc]init];
ScoreList = [[NSMutableArray alloc]init];
return self;
}
-(NSMutableArray *)ScoreTableWebService{
if (([address isEqualToString:@""]) || ([xmlNamespace isEqualToString:@""]) || ([operation isEqualToString:@""])) {
//return;
}
recordResults = FALSE;
NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
"<soap:Body>"
"<BayiSatisTakipTablo6Oku xmlns=\"http://trigonservis.com/\">"
"<IstasyonKodu>34005</IstasyonKodu>"
"<Gun1>02.01.2012</Gun1>"
"</BayiSatisTakipTablo6Oku>"
"</soap:Body>"
"</soap:Envelope>"
];
NSLog(@"Request SOAP = \n%@\n\n", soapMessage);
NSURL *url = [NSURL URLWithString:address];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[theRequest addValue: @"http://trigonservis.com/BayiSatisTakipTablo6Oku" forHTTPHeaderField:@"SOAPAction"];
[theRequest addValue: soapMessage forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPMethod:@"POST"];
[theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
//Connexion
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if( theConnection ) {
webData = [[NSMutableData data] retain];
}
else {
NSLog(@"there is a problem to connect webservices");
}
while (!connectionFinished) {
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
}
return ScoreList;
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
#if(TARGET_IPHONE_SIMULATOR)
NSLog(@"Reponse SOAP = \n%@\n\n", theXML);
#endif
[theXML release];
// Appel futur du parser
if(xmlParser)
[xmlParser release];
// Allocation du NSXMLParser
xmlParser = [[NSXMLParser alloc] initWithData: webData];
// Désigne l'instance de la classe courante comme étant le delegate du NSXMLParser
[xmlParser setDelegate: self];
[xmlParser setShouldResolveExternalEntities: YES];
[xmlParser parse];
[connection release];
[webData release];
connectionFinished = TRUE;
}
/************************************************************************************
** Connection */
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength: 0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[connection release];
[webData release];
}
/************************************************************************************
** XML Parsing
*/
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *)qName
attributes: (NSDictionary *)attributeDict {
NSLog(@"elementName = %@ \n", elementName);
if( [elementName isEqualToString:@"DagiticiSatis"])
{
if(!soapResults)
soapResults = [[NSMutableString alloc] init];
recordResults = TRUE;
}
else if( [elementName isEqualToString:@"IstasyonAdi"])
{
if(!soapResults)
soapResults = [[NSMutableString alloc] init];
recordResults = TRUE;
}
return;
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if( recordResults ){
[soapResults appendString: string];
}
}
-(NSMutableArray *)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if( [elementName isEqualToString:@"DagiticiSatis"]) {
#if(TARGET_IPHONE_SIMULATOR)
NSLog(@"ScoreID = %@ \n", soapResults);
#endif
score = [[ScoreClass alloc]init];
score.MacID = soapResults;
[soapResults release];
soapResults = nil;
}
else if( [elementName isEqualToString:@"IstasyonAdi"]){
#if(TARGET_IPHONE_SIMULATOR)
NSLog(@"IstasyonAdi = %@ \n", soapResults);
#endif
score.NickName = soapResults;
[soapResults release];
soapResults = nil;
}
return ScoreList;
}
@end
GridTableViewCell.h
#import <UIKit/UIKit.h>
@interface GridTableViewCell : UITableViewCell {
UIColor *lineColor;
BOOL topCell;
UILabel *cell1;
UILabel *cell2;
UILabel *cell3;
}
@property (nonatomic, retain) UIColor* lineColor;
@property (nonatomic) BOOL topCell;
@property (readonly) UILabel* cell1;
@property (readonly) UILabel* cell2;
@property (readonly) UILabel* cell3;
@end
GridTableViewCell.m
#import "GridTableViewCell.h"
#define cell1Width 80
#define cell2Width 80
#define cellHeight 44
@implementation GridTableViewCell
@synthesize lineColor, topCell, cell1, cell2, cell3;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
topCell = NO;
// Add labels for the three cells
cell1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, cell1Width, cellHeight)];
cell1.textAlignment = UITextAlignmentCenter;
cell1.backgroundColor = [UIColor clearColor]; // Important to set or lines will not appear
[self addSubview:cell1];
cell2 = [[UILabel alloc] initWithFrame:CGRectMake(cell1Width, 0, cell2Width, cellHeight)];
cell2.textAlignment = UITextAlignmentCenter;
cell2.backgroundColor = [UIColor clearColor]; // Important to set or lines will not appear
[self addSubview:cell2];
cell3 = [[UILabel alloc] initWithFrame:CGRectMake(cell1Width+cell2Width, 0, 320-(cell1Width+cell2Width), cellHeight)]; // Note - hardcoded 320 is not ideal; this can be done better
cell3.textAlignment = UITextAlignmentCenter;
cell3.backgroundColor = [UIColor clearColor]; // Important to set or lines will not appear
[self addSubview:cell3];
}
return self;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
- (void)dealloc
{
[cell1 release];
[cell2 release];
[cell3 release];
[super dealloc];
}
- (void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetStrokeColorWithColor(context, lineColor.CGColor);
// CGContextSetLineWidth: The default line width is 1 unit. When stroked, the line straddles the path, with half of the total width on either side.
// Therefore, a 1 pixel vertical line will not draw crisply unless it is offest by 0.5. This problem does not seem to affect horizontal lines.
CGContextSetLineWidth(context, 1.0);
// Add the vertical lines
CGContextMoveToPoint(context, cell1Width+0.5, 0);
CGContextAddLineToPoint(context, cell1Width+0.5, rect.size.height);
CGContextMoveToPoint(context, cell1Width+cell2Width+0.5, 0);
CGContextAddLineToPoint(context, cell1Width+cell2Width+0.5, rect.size.height);
// Add bottom line
CGContextMoveToPoint(context, 0, rect.size.height);
CGContextAddLineToPoint(context, rect.size.width, rect.size.height-0.5);
// If this is the topmost cell in the table, draw the line on top
if (topCell)
{
CGContextMoveToPoint(context, 0, 0);
CGContextAddLineToPoint(context, rect.size.width, 0);
}
// Draw the lines
CGContextStrokePath(context);
}
- (void)setTopCell:(BOOL)newTopCell
{
topCell = newTopCell;
[self setNeedsDisplay];
}
@end
最佳答案
1 设置表的委托(delegate)。
2 将 Web 服务中的数据分配给 NSMutableArray。
3 编写下面提到的方法。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//create cell here
}
4次通话
[tblView reloadData];
关于iphone - 所有输出结果都有效，但 TableView 未从 iPhone 中的 Web 服务加载数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16396761/