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現在、メモリリークが発生しているアニメーション時計があります。現時点では、画像の上に物を置くことはできるようですが、それを取り除いたり、必ずしもクリアしたりすることはできません (秒針が 2 つの異なる位置にないように時計全体を再描画することは別として)。

クロック コンポーネントをクリアするためのコードは次のとおりです。

for(UIView *image in self.toWipe)
{
    [image removeFromSuperview];
}
[self.toWipe removeAllObjects];

秒針を描画するコード (時間と分の扱いは同じです) は次のとおりです。

CGAffineTransform secondTransform = CGAffineTransformMakeTranslation(centerX, centerY);
secondTransform = CGAffineTransformTranslate(secondTransform, -10, -189);
secondTransform = CGAffineTransformRotate(secondTransform, seconds / 60.0 * M_PI * 2.0);
UIImageView *secondHandView = [[UIImageView alloc] initWithImage:secondHandImage];
secondHandView.transform = secondTransform;
[self.view addSubview:secondHandView];
[self.toWipe addObject:secondHandView];
[self.toWipe addObject:secondHandImage];

各反復で時計の文字盤を描画することにより、描画された秒針が消去されないようにマスクしました。そうしないと、秒針 (または他の針) が 360° 塗りつぶされた円盤に到達するまで、成長するパイのスライスを一掃します。記憶はゆっくりと、しかし着実に成長し、秒針の動きがぎこちなくなります。

使用済みのオブジェクトを忘却させるためにできること、またはすべきことは他にありますか? このプロジェクトでは ARC を使用しています。メモリリークが修正されるように、他に何を与えることができるかを知りたいです。

ありがとう、

- 編集 -

以下は、コメント化された cruft とコメント化されていない cruft を含む、メソッド本体です。例外には対処せず、本文のどこからでも例外は発生しません。

int height = floor([[UIScreen mainScreen] bounds].size.height + .4);
int width = floor([[UIScreen mainScreen] bounds].size.width + .4);
UIImage *backgroundImage = nil;

if (height == 2048 || height == 2008 || height == 1024 || height == 1004 || height == 984)
{
    if (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation))
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Portrait.png"];
    }
    else
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Landscape.png"];
    }
}
else if (height == 1536 || height == 768 || height == 748 || height == 728)
{
    backgroundImage = [UIImage imageNamed:@"Background-Default-Landscape.png"];
}
else if (height == 1136 || height == 1116 || height == 1096)
{
    if (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation))
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-568.png"];
    }
    else
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Rotated-568.png"];
    }
}
else if (height == 960 || height == 940 || height == 920 || height == 480 || height == 460 || height == 440)
{
    if (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation))
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default.png"];
    }
    else
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Rotated.png"];
    }
}
else if ((height == 640 || height == 620 || height == 600) && (width == 1136 || width == 1116 || width == 1096))
{
    backgroundImage = [UIImage imageNamed:@"Background-Rotated-568.png"];
}
else if ((height == 640 || height == 620 || height == 600 || height == 320 || height == 300 || height == 280) && (width == 960 || width == 940 || width == 920 || width == 480 || width == 470 || width == 410))
{
    if (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation))
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Portrait.png"];
    }
    else
    {
        backgroundImage = [UIImage imageNamed:@"Background-Default-Rotated.png"];
    }
}
else
{
    backgroundImage = [UIImage imageNamed:@"Background-Default-Portrait.png"];

}
backgroundImage = [UIImage imageNamed:@"Background-Default-Landscape.png"];


if (!UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation))
{
    int juggle = height;
    height = width;
    width = juggle;
}
NSUInteger centerX = width * .5;
NSUInteger centerY = height * .5;

CGRect containerRect = CGRectZero;
containerRect.size = [[UIScreen mainScreen] bounds].size;

for(UIView *image in self.toWipe)
{
    [image removeFromSuperview];
}
[self.toWipe removeAllObjects];
self.view.backgroundColor = [UIColor colorWithPatternImage:backgroundImage];
//     UIView *background = [UIImage imageNamed:@"Background-Default-Landscape.png"];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:backgroundImage];
[self.view addSubview:backgroundView];
[self.toWipe addObject:backgroundView];
self.containerView = [[UIView alloc] initWithFrame:containerRect];
// float hours = 5.0;
// float minutes = 19.0;
// float seconds = 312.0;
// int timeStampMilliseconds = (ceil([[NSDate date] timeIntervalSince1970] * 1000.0));
// double timeStampMilliseconds = [[NSDate date] timeIntervalSince1970] * 1000.0;
double timeStampMilliseconds = CACurrentMediaTime() * 1000;
double hours = fmodf(timeStampMilliseconds, 86400000) / 3600000.0;
double minutes = fmodf(timeStampMilliseconds, 3600000) / 60000.0;
double seconds = fmodf(timeStampMilliseconds, 60000) / 1000.0;
// NSLog(@"Milliseconds: %lf, Hours: %lf, minutes: %lf, seconds: %lf", timeStampMilliseconds, hours, minutes, seconds);
[self.containerView removeFromSuperview];
self.containerView = [[UIView alloc] initWithFrame:containerRect];
UIImage *hourHandImage = [UIImage imageNamed:@"hour-hand.png"];
UIImageView *hourHandView = [[UIImageView alloc] initWithImage:hourHandImage];
hourHandImage = [UIImage imageNamed:@"hour-hand.png"];
hourHandView = [[UIImageView alloc] initWithImage:hourHandImage];
[self.view addSubview:hourHandView];

// UIImage *dotImage = [UIImage imageNamed:@"dot.png"];
// UIImageView *dotView = [[UIImageView alloc] initWithImage:dotImage];
// dotView.transform = CGAffineTransformMakeTranslation(centerX, centerY);
// [self.view addSubview:dotView];



hourHandView.layer.anchorPoint = CGPointMake(0.5f, 0.5f);
CGAffineTransform hourTransform = CGAffineTransformMakeTranslation(centerX, centerY);
    hourTransform = CGAffineTransformTranslate(hourTransform, -22, -122);
    hourTransform = CGAffineTransformRotate(hourTransform, hours / 12.0 * M_PI * 2.0);
    CGAffineTransform minuteTransform = CGAffineTransformMakeTranslation(centerX, centerY);
    minuteTransform = CGAffineTransformTranslate(minuteTransform, -10, -182);
    minuteTransform = CGAffineTransformRotate(minuteTransform, minutes / 60.0 * M_PI * 2.0);
    // hourTransform = CGAffineTransformTranslate(hourTransform, -sin(angle) * 50 + 122 , -cos(angle) * 50 + 122);


// hourTransform = CGAffineTransformTranslate(hourTransform, -330, 330);
hourHandView.transform = hourTransform;
[self.toWipe addObject:hourHandImage];
[self.toWipe addObject:hourHandView];
UIImage *minuteHandImage = [UIImage imageNamed:@"minute-hand.png"];
UIImageView *minuteHandView = [[UIImageView alloc] initWithImage:minuteHandImage];
minuteHandView.transform = minuteTransform;
[self.view addSubview:minuteHandView];
[self.toWipe addObject:minuteHandView];
[self.toWipe addObject:minuteHandImage];

minuteTransform = CGAffineTransformRotate(minuteTransform, minutes / 60.0 * M_PI * 2.0);
UIImage *secondHandImage = [UIImage imageNamed:@"second-hand.png"];
CGAffineTransform secondTransform = CGAffineTransformMakeTranslation(centerX, centerY);
secondTransform = CGAffineTransformTranslate(secondTransform, -10, -189);
secondTransform = CGAffineTransformRotate(secondTransform, seconds / 60.0 * M_PI * 2.0);
UIImageView *secondHandView = [[UIImageView alloc] initWithImage:secondHandImage];
secondHandView.transform = secondTransform;
[self.view addSubview:secondHandView];
[self.toWipe addObject:secondHandView];
[self.toWipe addObject:secondHandImage];



// hourHandView.layer.anchorPoint = CGPointMake(centerX, centerY);
// hourHandView.layer.affineTransform = CGAffineTransformRotate(transform, hour / (12.0 * M_PI * 2.0));
// UIImageView *minuteHandView = [[UIImageView alloc] initWithImage:minuteHandImage];
// UIImageView *secondHandView = [[UIImageView alloc] initWithImage:secondHandImage];

// [self.view addSubview:minuteHandView];
// [self.view addSubview:secondHandView];
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1 に答える 1

2

イメージビューを何度も削除して追加するのではなく、毎秒変換を適用しようとしましたか?

私が取り組んでいた時計アプリに使用したコードは次のとおりです。

-(void)updateClock
{
    NSDateComponents *dateComponents = [[NSCalendar currentCalendar] components:(NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit) fromDate:inDate];
    NSInteger seconds = [dateComponents second];
    NSInteger minutes = [dateComponents minute];
    NSInteger hours = [dateComponents hour];
    //NSLog(@"raw: hours:%d min:%d secs:%d", hours, minutes, seconds);
    if (hours > 12) hours -=12; //PM

    //set angles for each of the hands
    CGFloat secAngle = Degrees2Radians(seconds/60.0*360);
    CGFloat minAngle = Degrees2Radians(minutes/60.0*360);

    CGFloat minAdjustment = minAngle/12.0;
    CGFloat hourAngle = Degrees2Radians(hours/12.0*360) + minAdjustment;

    //reflect the rotations + 180 degres since CALayers coordinate system is inverted
    secHand.transform = CATransform3DMakeRotation (secAngle+M_PI, 0, 0, 1);
    minHand.transform = CATransform3DMakeRotation (minAngle+M_PI, 0, 0, 1);
    hourHand.transform = CATransform3DMakeRotation (hourAngle+M_PI, 0, 0, 1);
}
于 2013-10-11T23:50:27.340 に答える