Iphone 从NSThread';调用时不调用NSURLConnection委托;s函数
我发送了Iphone 从NSThread';调用时不调用NSURLConnection委托;s函数,iphone,ios,objective-c,xcode,nsurlconnection,Iphone,Ios,Objective C,Xcode,Nsurlconnection,我发送了NSURLConnection请求,请求它工作正常。现在我想刷新信息,即重新发送NSURLConnection。当从按钮的iAction调用时,refresh正在工作。但无法从NSThread方法工作。我如何解决这个问题。这里是运行系统时间的NSThread函数。当时间等于凌晨1:00时,我想刷新API。但它不是调用NSURLConnection的委托 这是NSURL连接代码: -(void)displays:(model *)place { NSString *strs=[@"ht
NSURLConnection
请求,请求它工作正常。现在我想刷新信息,即重新发送NSURLConnection。当从按钮的iAction调用时,refresh
正在工作。但无法从NSThread
方法工作。我如何解决这个问题。这里是运行系统时间的NSThread
函数。当时间等于凌晨1:00时,我想刷新API。但它不是调用NSURLConnection
的委托
这是NSURL连接代码:
-(void)displays:(model *)place
{
NSString *strs=[@"http://www.earthtools.org/timezone-1.1/" stringByAppendingString:[NSString stringWithFormat:@"%@/%@",place.latitude,place.longitude]];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:strs]];
NSURLConnection *reqTimeZone=[NSURLConnection connectionWithRequest:request delegate:self];
[reqTimeZone start]; //here request not get start
}
- (void) setTimer {
//assign current time
[self countDown];
}
- (void) countDown {
//count the current time
if(hrs==12&& meridian==@"pm")
[self display:(placedetails)];//it calls the displays function but NSURLConnection is not get start.
[NSThread detachNewThreadSelector:@selector(setTimer) toTarget:self withObject:nil];
}
上面的代码在名为“displays”的函数中,参数是类的一个实例,它具有所有位置详细信息
NSthread函数代码:
-(void)displays:(model *)place
{
NSString *strs=[@"http://www.earthtools.org/timezone-1.1/" stringByAppendingString:[NSString stringWithFormat:@"%@/%@",place.latitude,place.longitude]];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:strs]];
NSURLConnection *reqTimeZone=[NSURLConnection connectionWithRequest:request delegate:self];
[reqTimeZone start]; //here request not get start
}
- (void) setTimer {
//assign current time
[self countDown];
}
- (void) countDown {
//count the current time
if(hrs==12&& meridian==@"pm")
[self display:(placedetails)];//it calls the displays function but NSURLConnection is not get start.
[NSThread detachNewThreadSelector:@selector(setTimer) toTarget:self withObject:nil];
}
上面的显示函数称为placedetails assigned,但未调用委托。要调用委托方法,需要将线程的运行循环附加到NSURLConnection。因为您正在创建一个线程,并且没有将NSURLConnection附加到线程的RunLoop,所以不会触发连接委托方法 以下是一个例子:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// I am creating a button and adding it to viewController's view
UIButton *bttn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[bttn setFrame:CGRectMake(100.0f, 200.0f, 120.0f, 50.0f)];
[bttn setTitle:@"Download" forState:UIControlStateNormal];
[bttn addTarget:self action:@selector(spawnThreadForDownload) forControlEvents:UIControlEventTouchUpInside];
[[self view] addSubview:bttn];
}
- (void)spawnThreadForDownload
{
[NSThread detachNewThreadSelector:@selector(downloadAndParse) toTarget:self withObject:nil];
}
- (void)downloadAndParse
{
@autoreleasepool {
NSURL *url = [NSURL URLWithString:@"http://apple.com"];
NSURLRequest *req = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
timeoutInterval:20.0f];
NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
// Run the currentRunLoop of your thread (Every thread comes with its own RunLoop)
[[NSRunLoop currentRunLoop] run];
// Schedule your connection to run on threads runLoop.
[conn scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}
}
// NSURLConnectionDelegate methods
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"Connection failed with error: %@",[error localizedDescription]);
}
// NSURLConnectionDataDelegate methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"Connection finished downloading");
}
对于要调用的委托方法,您需要将线程的runloop附加到NSURLConnection。因为您正在创建一个线程,并且没有将NSURLConnection附加到线程的RunLoop,所以不会触发连接委托方法 以下是一个例子:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// I am creating a button and adding it to viewController's view
UIButton *bttn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[bttn setFrame:CGRectMake(100.0f, 200.0f, 120.0f, 50.0f)];
[bttn setTitle:@"Download" forState:UIControlStateNormal];
[bttn addTarget:self action:@selector(spawnThreadForDownload) forControlEvents:UIControlEventTouchUpInside];
[[self view] addSubview:bttn];
}
- (void)spawnThreadForDownload
{
[NSThread detachNewThreadSelector:@selector(downloadAndParse) toTarget:self withObject:nil];
}
- (void)downloadAndParse
{
@autoreleasepool {
NSURL *url = [NSURL URLWithString:@"http://apple.com"];
NSURLRequest *req = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
timeoutInterval:20.0f];
NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
// Run the currentRunLoop of your thread (Every thread comes with its own RunLoop)
[[NSRunLoop currentRunLoop] run];
// Schedule your connection to run on threads runLoop.
[conn scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}
}
// NSURLConnectionDelegate methods
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"Connection failed with error: %@",[error localizedDescription]);
}
// NSURLConnectionDataDelegate methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"Connection finished downloading");
}
请帮助我。。。我花了一整天的时间。从按钮函数API调用工作。但在NSThread called function中不起作用要调用委托方法,需要将runloop附加到NSURLConnection。由于您正在创建一个线程,并且没有将NSURLConnection附加到线程的RunLoop,因此不会触发连接委托方法。请帮助我。。。我花了一整天的时间。从按钮函数API调用工作。但在NSThread called function中不起作用要调用委托方法,需要将runloop附加到NSURLConnection。因为您正在创建一个线程,并且没有将NSURLConnection附加到线程的RunLoop,所以不会触发连接委托方法。