//问题得到了回答，基本上我应该多睡点时间/少写代码:)
当我的应用程序启动时，我首先加载启动屏幕，当屏幕本身完成加载时，此启动屏幕将启动dataDownload：
Splash.m
@implementation Splash
- (id) init
{
self = [super init];
_lblFunds = [[UILabel alloc] initWithFrame:CGRectMake(350, 330, 324,28)];
_lblFunds.numberOfLines = 1;
[_lblFunds setFont:[UIFont systemFontOfSize:24.0]];
[_lblFunds setTextAlignment: UITextAlignmentCenter];
[_lblFunds setText:@".. Fondsen .."];
[self.view addSubview:_lblFunds];
_lblObjects = [[UILabel alloc] initWithFrame:CGRectMake(350, 360, 324,28)];
_lblObjects.numberOfLines = 1;
[_lblObjects setFont:[UIFont systemFontOfSize:24.0]];
[_lblObjects setTextAlignment: UITextAlignmentCenter];
[_lblObjects setText:@".. Vastgoed Objecten .."];
[self.view addSubview:_lblObjects];
_lblCustomers = [[UILabel alloc] initWithFrame:CGRectMake(350, 390, 324,28)];
_lblCustomers.numberOfLines = 1;
[_lblCustomers setFont:[UIFont systemFontOfSize:24.0]];
[_lblCustomers setTextAlignment: UITextAlignmentCenter];
[_lblCustomers setText:@".. Clienten .."];
[self.view addSubview:_lblCustomers];
return self;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(fundsLoaded) name:@"FundsDone" object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(customersLoaded) name:@"CustomersDone" object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(objectsLoaded) name:@"ObjectsDone" object:nil];
}
- (void) fundsLoaded
{
[_lblFunds setText:[NSString stringWithFormat:@"Fondsen geladen: %d",[[DataManager sharedInstance] fundsCount]]];
}
- (void) objectsLoaded
{
[_lblObjects setText:[NSString stringWithFormat:@"Vastgoed Objecten geladen: %d",[[DataManager sharedInstance] objectsCount]]];
}
- (void) customersLoaded
{
[_lblCustomers setText:[NSString stringWithFormat:@"Clienten geladen: %d",[[DataManager sharedInstance] customersCount]]];
}
- (void) viewDidLoad
{
[super viewDidLoad];
[[DataManager sharedInstance] getData];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
@end
然后，每当解析和存储数据时，DataManager就会继续使用其DataLoader实例在单独的线程中加载和解析数据，并从DataLoader发送通知。如果以前使用过Notifications，但这次却无法使用，我似乎无法弄清楚为什么不这样做。没有错误或任何错误，但是从未调用观察者中设置的功能。任何关于出问题的主意都非常欢迎，我已经在这里和其他站点上阅读了很多主题，但尚未找到我的答案。
数据管理器
@implementation DataManager
static DataManager* _dataManager = nil;
static DataLoader *_dataLoader = nil;
static bool _dataLoaded = FALSE;
- (int) fundsCount
{
return _dataLoader.funds_count;
}
- (int) objectsCount
{
return _dataLoader.objects_count;
}
- (int) customersCount
{
return _dataLoader.customers_count;
}
+ (DataManager *) sharedInstance{
@synchronized([DataManager class])
{
if(!_dataManager)
{
_dataManager = [[super alloc] init];
_dataLoader = [[DataLoader alloc] init];
}
return _dataManager;
}
return nil;
}
- (void) loadDataSucces
{
_dataLoaded = TRUE;
}
- (void) _getData
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
if(_dataLoader)
{
[_dataLoader loadData];
} else
{
NSLog(@"DataLoader not initialized");
}
[pool drain];
}
- (void) getData
{
[NSThread detachNewThreadSelector:@selector(_getData) toTarget:self withObject:nil];
}
@end
数据加载器
- (void) parseData: (NSString *) jsonString
{
NSError *err;
SBJsonParser *parser = [[SBJsonParser alloc] init];
id object = [parser objectWithString:jsonString error:&err];
[jsonString release];
if (!object) {
} else {
//funds
id funds = [object objectForKey:@"fondsen"];
[self deleteAllEntitiesOfType:@"Fund"];
int nr = 0;
for (NSDictionary *i in funds)
{
NSString *naam = [i objectForKey:@"naam"];
if([naam length] > 2)
{
NSManagedObjectContext *context = [(CatalogusAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
Fund *f = [NSEntityDescription insertNewObjectForEntityForName:@"Fund" inManagedObjectContext: context];
NSString *integertje = [i objectForKey:@"oid"];
int in = [integertje integerValue];
[f setOid: [NSNumber numberWithInt: in ]];
[f setNaam: naam];
NSError *error = nil;
if( ![context save: &error ])
{
NSLog(@"Error: %@", [[error userInfo] valueForKey:@"ErrorString"]);
} else
{
nr++;
}
}
}
funds_count = nr;
[[NSNotificationCenter defaultCenter] postNotificationName:@"FundsDone" object:nil];
//objects
if( true )
{
id objects = [object objectForKey:@"vastgoedobjecten"];
[self deleteAllEntitiesOfType:@"Object"];
nr = 0;
NSManagedObjectContext *context = [(CatalogusAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
for (NSDictionary *i in objects)
{
Object *o = [NSEntityDescription insertNewObjectForEntityForName:@"Object" inManagedObjectContext: context];
[o setFondsOid:[NSNumber numberWithInt: [ [i objectForKey:@"fondsOid"] integerValue] ]];
[o setOid: [NSNumber numberWithInt: [ [i objectForKey:@"oid"] integerValue] ]];
[o setAdres:[i objectForKey:@"adres"]];
[o setPostcode:[i objectForKey:@"postcode"]];
[o setPlaats: [ i objectForKey:@"plaats"]];
[o setProvincie:[i objectForKey:@"provincie"]];
[o setStatus:[i objectForKey:@"status"]];
[o setSegment:[i objectForKey:@"segment"]];
[o setOppervlakte:[NSNumber numberWithInt: [ [i objectForKey:@"oppervlakte"] integerValue] ]];
[o setBelangrijksteHuurder:[i objectForKey:@"belangrijksteHuurder"]];
[o setWeging:[i objectForKey:@"weging"]];
[o setLongitude:[NSNumber numberWithDouble: [ [i objectForKey:@"longitude"] doubleValue] ]];
[o setLatitude:[NSNumber numberWithDouble: [ [i objectForKey:@"latitude"] doubleValue] ]];
NSError *error = nil;
if( ![context save: &error ])
{
NSLog(@"Error: %@", [[error userInfo] valueForKey:@"ErrorString"]);
} else
{
nr++;
}
}
objects_count = nr;
NSLog(@"ObjectsLoaded");
[[NSNotificationCenter defaultCenter] postNotificationName:@"ObjectsDone" object:nil];
}
//customers
if( true )
{
id custs = [object objectForKey:@"klanten"];
[self deleteAllEntitiesOfType:@"Customer"];
nr = 0;
NSManagedObjectContext *context = [(CatalogusAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
for (NSDictionary *i in custs)
{
Customer *c = [NSEntityDescription insertNewObjectForEntityForName:@"Customer" inManagedObjectContext: context];
[c setOid: [NSNumber numberWithInt: [ [i objectForKey:@"oid"] integerValue] ]];
[c setFondsOid:[NSNumber numberWithInt: [ [i objectForKey:@"fondsOid"] integerValue] ]];
[c setNaam: [i objectForKey:@"naam"]];
NSError *error = nil;
if( ![context save: &error ])
{
NSLog(@"Error: %@", [[error userInfo] valueForKey:@"ErrorString"]);
} else
{
nr++;
}
}
customers_count = nr;
[[NSNotificationCenter defaultCenter] postNotificationName:@"CustomersDone" object:nil];
}
}
[[NSNotificationCenter defaultCenter] postNotificationName:@"DataReady" object:nil];
}
- (void) loadData{
NSString *urlString = @"URL";
NSDate *startDownload = [NSDate date];
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *dataFeed = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error];
if(error){
NSString *d = [ error description ];
NSLog(@"error: %@",d);
} int bytes = [dataFeed length];
NSDate *endDownload = [NSDate date];
NSString *data = [[NSString alloc] initWithData:[NSData decompress:dataFeed] encoding:NSStringEncodingConversionExternalRepresentation];
int string = [data length];
NSDate *endDecompress = [NSDate date];
NSLog(@"Download data: %f - Decompress: %f - BytesDownloaded: %d", [endDownload timeIntervalSinceDate:startDownload], [endDecompress timeIntervalSinceDate:endDownload], bytes);
[[NSNotificationCenter defaultCenter] postNotificationName:@"DownloadDone" object:nil];
[self parseData:data];
}
最佳答案
在初始化中，您应该将注册码放在return语句之前。否则它将永远无法运行。
干杯!