方法に問題がありNSDateFormatter dateFromString:ます。文字列の日付を持つ辞書の配列があり、それらをNSDates. しかし、このメソッドを呼び出すたびにヒープが大幅に増加します (「更新」メソッドであるため、複数回呼び出す必要があります)。また、バックグラウンド スレッドで呼び出し、ARC がオンになっています。私は何を間違っていますか？助けてください。
更新: 関数の完全なコード:
- (GraphController *) initGraphWithData: (NSArray *) points forInterval: (GraphInterval) interval andFrame: (CGRect) frame gestures: (BOOL) gestures secondGraph: (NSArray *) secondPoints graphNames: (NSArray *) graphNames
{
self = [super init];
_calendar = [NSCalendar currentCalendar];
_secondPoints = secondPoints;
_graphNames = graphNames;
[self.view setFrame:frame];
_points = [[NSMutableArray alloc] init];
double minValue = HUGE_VALF, maxValue = -HUGE_VALF;
NSDate *minDate = [NSDate date], *maxDate = [NSDate dateWithTimeIntervalSince1970:0];
NSMutableDictionary *datesTable = [[NSMutableDictionary alloc] init];
int index = 0;
for(NSArray *pointArray in points){
NSDictionary *point = pointArray[0];
NSMutableDictionary *newPoint = [[NSMutableDictionary alloc] initWithDictionary:point];
// convert date
NSString *dateString = (NSString *)[point objectForKey:@"date"];
NSLog(@"dateString to convert: %@", dateString);
[_dateFormatter setDateFormat:@"MM/dd/yyyy"];
NSDate *date = [_dateFormatter dateFromString: dateString];
[newPoint setObject: date forKey:@"date"];
// convert numbers
[newPoint setObject: [NSNumber numberWithFloat:[((NSString *)[point objectForKey:@"value"]) floatValue]] forKey:@"value"];
if(secondPoints)
[newPoint setObject: [NSNumber numberWithFloat:[((NSString *)[secondPoints[index] objectForKey:@"value"]) floatValue]] forKey:@"secondValue"];
[newPoint setObject: [NSNumber numberWithInt:index] forKey:@"index"];
// min and max
if([[newPoint objectForKey:@"value"] floatValue] < minValue)
minValue = [[newPoint objectForKey:@"value"] floatValue];
if([[newPoint objectForKey:@"value"] floatValue] > maxValue)
maxValue = [[newPoint objectForKey:@"value"] floatValue];
// check second value
if(self.secondPoints){
if([[newPoint objectForKey:@"secondValue"] floatValue] < minValue)
minValue = [[newPoint objectForKey:@"secondValue"] floatValue];
if([[newPoint objectForKey:@"secondValue"] floatValue] > maxValue)
maxValue = [[newPoint objectForKey:@"secondValue"] floatValue];
}
if([[newPoint objectForKey:@"date"] timeIntervalSince1970] > [maxDate timeIntervalSince1970])
maxDate = [newPoint objectForKey:@"date"];
if([[newPoint objectForKey:@"date"] timeIntervalSince1970] < [minDate timeIntervalSince1970])
minDate = [newPoint objectForKey:@"date"];
[self.points addObject:newPoint];
[datesTable setObject:newPoint forKey: [[NSNumber numberWithDouble:[date timeIntervalSince1970]] stringValue] ];
index++;
}
// set draw parameters
_drawVars = [[NSMutableDictionary alloc] init];
NSDate *startSearchDate;
switch (interval) {
case GraphIntervalWeek:
startSearchDate = [maxDate dateByAddingTimeInterval:-7*24*3600];
break;
case GraphIntervalMonth:
startSearchDate = [maxDate dateByAddingTimeInterval: -31*24*3600];
break;
case GraphIntervalSixMonths:
startSearchDate = [maxDate dateByAddingTimeInterval:-6*31*24*3600];
break;
case GraphIntervalYear:
startSearchDate = [maxDate dateByAddingTimeInterval:-365*24*3600];
break;
case GraphIntervalAllTime:
break;
default:
break;
}
NSMutableDictionary *searchPoint;
while(searchPoint == nil && [startSearchDate timeIntervalSince1970] > [minDate timeIntervalSince1970]){
searchPoint = [datesTable objectForKey:[[NSNumber numberWithDouble:[startSearchDate timeIntervalSince1970]] stringValue]];
startSearchDate = [startSearchDate dateByAddingTimeInterval:-24*3600];
}
if(searchPoint != nil && interval != GraphIntervalAllTime)
[self.drawVars setObject:[searchPoint objectForKey:@"index"] forKey:@"startDrawIndex"];
else
[self.drawVars setObject:[NSNumber numberWithInt:0] forKey:@"startDrawIndex"];
[self.drawVars setObject:[[NSNumber numberWithFloat:minValue] copy] forKey:@"minValue"];
[self.drawVars setObject:[[NSNumber numberWithFloat:maxValue] copy] forKey:@"maxValue"];
[self.drawVars setObject:minDate forKey:@"minDate"];
[self.drawVars setObject:maxDate forKey:@"maxDate"];
[self.drawVars setObject:datesTable forKey:@"datesTable"];
// set drawImageView
_drawArea = [[UIImageView alloc] initWithFrame: frame];
[self.view addSubview:self.drawArea];
// set overlayImageView for fingerInpect
_inspectOverlay = [[UIImageView alloc] initWithFrame:frame];
[self.view addSubview:self.inspectOverlay];
// set hintUIView for fingerInspect
_hint = [[Hint alloc] initWithFrame:frame];
[self.hint initHint];
self.hint.hidden = YES;
[self.drawArea addSubview:self.hint];
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panHandler:)];
UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressHandler:)];
if(gestures)
[self.view addGestureRecognizer:panRecognizer];
[self.view addGestureRecognizer:longPressRecognizer];
return self;
}