Question

我想知道如何在XCode for iPhone OS中用Objective-C语言编写程序，我想从另一个应用程序调用一个应用程序（例如：hello world）（它的一个调用应用程序，其功能只是调用你好世界的应用）。如何在调用应用程序中给出hello world的路径以及在哪里放置我的hello world应用程序（我的意思是，我应该在我的项目中导入hello world还是在我的调用应用程序中指定它的URL）.. ??请给出编码例如???

Answer 1

请参阅：iPhone App Programming Guide

这是你的第二个应用程序必须做的事情来处理来自第一个的公开呼叫：

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
    if ([[url scheme] isEqualToString:@"todolist"]) {
        ToDoItem *item = [[ToDoItem alloc] init];
        NSString *taskName = [url query];
        if (!taskName || ![self isValidTaskString:taskName]) { // must have a task name
            [item release];
            return NO;
        }
        taskName = [taskName stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

        item.toDoTask = taskName;
        NSString *dateString = [url fragment];
        if (!dateString || [dateString isEqualToString:@"today"]) {
            item.dateDue = [NSDate date];
        } else {
            if (![self isValidDateString:dateString]) {
                [item release];
                return NO;
            }
            // format: yyyymmddhhmm (24-hour clock)
            NSString *curStr = [dateString substringWithRange:NSMakeRange(0, 4)];
            NSInteger yeardigit = [curStr integerValue];
            curStr = [dateString substringWithRange:NSMakeRange(4, 2)];
            NSInteger monthdigit = [curStr integerValue];
            curStr = [dateString substringWithRange:NSMakeRange(6, 2)];
            NSInteger daydigit = [curStr integerValue];
            curStr = [dateString substringWithRange:NSMakeRange(8, 2)];
            NSInteger hourdigit = [curStr integerValue];
            curStr = [dateString substringWithRange:NSMakeRange(10, 2)];
            NSInteger minutedigit = [curStr integerValue];

            NSDateComponents *dateComps = [[NSDateComponents alloc] init];
            [dateComps setYear:yeardigit];
            [dateComps setMonth:monthdigit];
            [dateComps setDay:daydigit];
            [dateComps setHour:hourdigit];
            [dateComps setMinute:minutedigit];
            NSCalendar *calendar = [NSCalendar currentCalendar];
            NSDate *itemDate = [calendar dateFromComponents:dateComps];
            if (!itemDate) {
                [dateComps release];
                [item release];
                return NO;
            }
            item.dateDue = itemDate;
            [dateComps release];
        }

        [(NSMutableArray *)self.list addObject:item];
        [item release];
        return YES;
    }
    return NO;
}

并且第一个应用程序打开它：

NSURL *myURL = [NSURL URLWithString:@"todolist://www.acme.com?Quarterly%20Report#200806231300"];
[[UIApplication sharedApplication] openURL:myURL];

如何在我的XCode项目中调用应用程序？

1 个答案: