不能为不同的字典设置不同的值
不能为不同的字典设置不同的值
提问于 2013-05-04 13:09:03
我通过NSDictionaries循环计算从用户位置到注释的距离，如下所示：
CLLocation *pinLocation = [[CLLocation alloc]
initWithLatitude:realLatitude
longitude:realLongitude];
CLLocation *userLocation = [[CLLocation alloc]
initWithLatitude:mapView.userLocation.coordinate.latitude
longitude:mapView.userLocation.coordinate.longitude];
CLLocationDistance distance = [pinLocation distanceFromLocation:userLocation];结果：
NSLog(@"Distance: %4.0f m.", distance);
2013-05-04 15:58:53.301 testApp[3194:907] Distance: 65758 m.
2013-05-04 15:58:53.304 testApp[3194:907] Distance: 91454 m.
2013-05-04 15:58:53.308 testApp[3194:907] Distance: 248726 m.
2013-05-04 15:58:53.310 testApp[3194:907] Distance: 297228 m.
2013-05-04 15:58:53.313 testApp[3194:907] Distance: 163058 m.然后，我尝试在数组中为字典添加距离。
NSString *dist = [NSString stringWithFormat:@"%4.0f m.", distance];
[ann setValue:dist forKey:@"Distance"];但它只增加了最后一段距离(距离: 163058米)。所有的字典。
如何为不同的字典设置不同的值？
编辑:我的循环
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"blueKey"])
{
ann = [dict objectForKey:@"Blue"];
[resultArray addObject:@"Blue"];
for(int i = 0; i < [ann count]; i++) {
NSString *coordinates = [[ann objectAtIndex:i] objectForKey:@"Coordinates"];
double realLatitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:1] doubleValue];
double realLongitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:0] doubleValue];
MyAnnotation *myAnnotation = [[MyAnnotation alloc] init];
CLLocationCoordinate2D theCoordinate;
theCoordinate.latitude = realLatitude;
theCoordinate.longitude = realLongitude;
myAnnotation.coordinate=CLLocationCoordinate2DMake(realLatitude,realLongitude);
myAnnotation.title = [[ann objectAtIndex:i] objectForKey:@"Name"];
myAnnotation.subtitle = [[ann objectAtIndex:i] objectForKey:@"Address"];
myAnnotation.icon = [[ann objectAtIndex:0] objectForKey:@"Icon"];
[mapView addAnnotation:myAnnotation];
[annotations addObject:myAnnotation];
// Calculating distance
CLLocation *pinLocation = [[CLLocation alloc]
initWithLatitude:realLatitude
longitude:realLongitude];
CLLocation *userLocation = [[CLLocation alloc]
initWithLatitude:mapView.userLocation.coordinate.latitude
longitude:mapView.userLocation.coordinate.longitude];
CLLocationDistance distance = [pinLocation distanceFromLocation:userLocation];
// NSLog(@"Distance: %4.0f m.", distance);
NSString *dist = [NSString stringWithFormat:@"%4.0f m.", distance];
[ann setValue:dist forKey:@"Distance"];
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2013-05-04 13:23:04
您可以添加某些Array中的所有值，然后可以使用它保存在不同的字典中。
在这条线之后：
// NSLog(@"Distance: %4.0f m.", distance);加：
NSString *dist = [NSString stringWithFormat:@"%4.0f m.", distance];
NSMutableDictionary *inDict = [[NSMutableDictionary alloc] init];
inDict = [ann objectAtIndex:i];
[inDict setValue:dist forKey:@"Distance"];页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/16374643
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