现在我遍历一个数组循环一次和计算距离是这样的:如何通过阵列
- (void)calculateDistance
{
ann = [dict objectForKey:@"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];
// 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];
// Adding distance to dictionaries
if (distance > 1000) {
NSString *dist = [NSString stringWithFormat:@"%.2f km.", distance/1000];
NSMutableDictionary *inDict = [[NSMutableDictionary alloc] init];
inDict = [ann objectAtIndex:i];
[inDict setValue:dist forKey:@"Distance"];
}
else{
NSString *dist = [NSString stringWithFormat:@"%4.0f m.", distance];
NSMutableDictionary *inDict = [[NSMutableDictionary alloc] init];
inDict = [ann objectAtIndex:i];
[inDict setValue:dist forKey:@"Distance"];
}
}
}
我的数据结构为:
如何通过所有阵列的在循环一旦?我有数组,它包含我所有的Array的命名为 “resultArray”,但是这个代码不工作:
ann = [dict objectForKey:resultArray];
的NSLog(@ “%@”,resultArray);
2013-05-05 10:57:03.643 testApp[5708:907] (
Black,
Green,
Orange,
Blue,
Darkblue
)
“不起作用”是非信息性的。告诉我们究竟是什么错误。 – 2013-05-05 08:07:41
如果我这样做:ann = [dict objectForKey:resultArray];距离不添加到字典,如果我这样做:ann = [dict objectForKey:@“Blue”];或ann = [dict objectForKey:@“Yellow”];等等。距离增加到蓝色,黄色字典 – 2013-05-05 08:17:18
你可以检查我的答案。 – Anupdas 2013-05-05 09:20:26