Question

编辑：我遇到的问题是我使用TapKu日历，所以我依赖于提供的代表。这是问题：

- (NSArray*) calendarMonthView:(TKCalendarMonthView*)monthView marksFromDate:(NSDate*)startDate toDate:(NSDate*)lastDate{

//SOAP Request has NSURLConnection which runs asychonrous delegate methods.
//SOAP Request will return before the data array has been populated
[self SOAPRequest:startDate];

//i need to do something like this, however the SOAPRequest will return and get stuck into the loop instead of the asychronos delegates firing
//therefore i can never set bGettingData to NO.
int iWait;
while (bGettingData) {
    iWait++;
}

return dataArray;

}

您好，

在我正在创建的应用程序中，我依靠SOAP请求来检索数据，解析XML并填充数组。

我遇到的问题是，当我检查数组时它是空的，因为SOAP请求还没有完成。在SOAP请求完成并恢复代码之前，如何阻止我的代码执行？这可以通过回调或线程来完成吗？

由于

Answer 1

不要暂时停止，睡觉或等待，而只是从当前的例程/功能/方法中退出/退出/返回。

将当前的“东西”分解为多个代码片段，每个片段都有自己的方法。

使用后续方法执行接下来的任何操作，并让异步网络/ SOAP请求的完成例程调用该方法。

基本上，您的问题是您仍然在考虑程序编码。正确的范例是使用事件驱动的编码：让操作系统调用您的代码，而不是让您的代码调用操作系统并等待。

Answer 2

是，从这里开始：http://ondotnet.com/pub/a/dotnet/2005/08/01/async_webservices.html

Answer 3

您确实希望等待答案完成 - 回调通常最简单。究竟如何取决于您正在使用的编程库/语言（在javascript，objectiveC中，您是手工编写代码还是从示例开始）。

查看Iphone SOAP request step by step tutorial的答案 - 例如http://macresearch.org/interacting-soap-based-web-services-cocoa-part-1和http://brismith66.blogspot.com/2010/05/iphone-development-accesing-soap.html。或者按照https://developer.omniture.com/node/321 - 等待答案完全到达。

Answer 4

不幸的是，在使用TapKu日历时，您无法通过SOAP从数据库异步加载。您必须同步加载日历，因为一旦数据加载完毕，它们就无法刷新日历视图。如果您每月有40多条记录，这将产生5-6秒的巨大延迟。

Answer 5

这确实是可行的，作为日历视图的示例，将_refreshDataPageWithAtIndex修改为如下：

- (void) _refreshDataWithPageAtIndex:(NSInteger)index{

    UIScrollView *sv = self.pages[index];
    TKTimelineView *timeline = [self _timelineAtIndex:index];


    CGRect r = CGRectInset(self.horizontalScrollView.bounds, HORIZONTAL_PAD, 0);
    r.origin.x = self.horizontalScrollView.frame.size.width * index + HORIZONTAL_PAD;
    sv.frame = r;



    timeline.startY = VERTICAL_INSET;

    for (UIView* view in sv.subviews) {
        if ([view isKindOfClass:[TKCalendarDayEventView class]]){
            [self.eventGraveYard addObject:view];
            [view removeFromSuperview];
        }
    }

    if(self.nowLineView.superview == sv) [self.nowLineView removeFromSuperview];
    if([timeline.date isTodayWithTimeZone:self.timeZone]){

        NSDate *date = [NSDate date];
        NSDateComponents *comp = [date dateComponentsWithTimeZone:self.timeZone];

        NSInteger hourStart = comp.hour;
        CGFloat hourStartPosition = hourStart * VERTICAL_DIFF + VERTICAL_INSET;

        NSInteger minuteStart = round(comp.minute / 5.0) * 5;
        CGFloat minuteStartPosition = roundf((CGFloat)minuteStart / 60.0f * VERTICAL_DIFF);

        CGRect eventFrame = CGRectMake(self.nowLineView.frame.origin.x, hourStartPosition + minuteStartPosition - 5, NOB_SIZE + self.frame.size.width - LEFT_INSET, NOB_SIZE);
        self.nowLineView.frame = eventFrame;
        [sv addSubview:self.nowLineView];

    }

    if(!self.dataSource) return;

    timeline.events = [NSMutableArray new];
    [self.dataSource calendarDayTimelineView:self eventsForDate:timeline.date andEvents:timeline.events success:^{
        [timeline.events sortUsingComparator:^NSComparisonResult(TKCalendarDayEventView *obj1, TKCalendarDayEventView *obj2){
            return [obj1.startDate compare:obj2.startDate];
        }];

        [self _realignEventsAtIndex:index];
        if(self.nowLineView.superview == sv)
            [sv bringSubviewToFront:self.nowLineView];
    }];
}

然后将eventForDate函数更改为：

- (void) calendarDayTimelineView:(TKCalendarDayView*)calendarDayTimeline eventsForDate:(NSDate *)eventDate andEvents:(NSMutableArray *)events success:(void (^)())success {

    [Model doSomethingAsync andSuccess:^(NSArray *classes) {

        // .. Add stuff to events..

        success();
    }];
}

我假设其他控件的模式非常相似。前提是您正在等待继续格式化/布局流程，直到获得数据为止。

如何在SOAP请求完成之前暂停/停止功能

5 个答案: