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Closed 12 years ago.

我想从sqlite数据中检索经度和纬度，然后将这些数据添加到数组中，并将这些数组数据用作fake_location来显示用户的位置。

For solving this problem I am sending all my class TLocationManager.m file code -(id)init{ pointsArray = [[result componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] retain]; NSLog(@"This is the good think to have %@",pointsArray); pointsArrayIndex = 0; //NSLog(@"%@",pointsArrayIndex); oldLocationsIndex = 0;

    [result release];

    oldLocations = [[NSMutableArray alloc] init];
    return self;
}

Answer 1

第一次警告

[locations addObject:[NSString stringWithFormat:"%@,%@",dLongitude,dLatitude]];//over here i am getting warring  passing argument 1 of  stringWithFormat: from incompatible pointer type

将其替换为

[locations addObject:[NSString stringWithFormat:@"%@,%@",dLongitude,dLatitude]];//over here i am getting warring  passing argument 1 of  stringWithFormat: from incompatible pointer type

其次，您从哪里获得NSMutableArray的componentsByJoiningString函数。

 //Over here getting warring  NSMutableArray  may not respond to -componentsByJoiningString     
 result = [locations componentsByJoiningString:@" "]; // same as `fake_location`function

将其替换为

result = [locations componentsJoinedByString:@" "];

请参阅NSArrayhttp://developer.apple.com/library/ios/#documentation/cocoa/reference/foundation/Classes/NSArray_Class/NSArray.html“rel=”nofollow“>文档。。

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