如何在我的XCode项目中调用应用程序？

Question

我想知道如何在XCode for iPhone OS中使用Objective-C语言编写程序，我想从另一个应用程序（它是一个调用应用程序，其功能只是调用hello来调用应用程序（例如：hello world）世界应用程序）。如何在调用应用程序中给出hello world的路径以及将Hello World应用程序放在哪里（我的意思是，我应该在我的项目中导入hello world，还是只在我的调用应用程序中指定它的URL）..？请给出一个编码例？？？

Answer 1

参见：iPhone App Programming Guide

这是你的第二个应用程序必须做什么，以处理从第一公开征集：

- (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; 
} 

而且第一个应用程序打开它就像这样：

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