2
好吧，这是发生了什么...我有一个UIView子类，其中包括两点（开始和结束），这两点之间的CGPath和很多UILabels。如果我将UIView子类添加为我的scrollview子视图（位于基于CATiledLayer的UIView顶部），那么我的应用程序开始获取内存警告并最终崩溃。但是，如果我移除包含点和路径的UIView子类，并保持CATiledLayer视图不变，那么所有功能都可以正常工作，并且不会发生崩溃或内存警告。CATiledLayer子视图导致内存警告和崩溃
有没有人有任何想法，为什么发生这种情况？内容视图不应该有太大的问题，因为我只绘制最大宽度为40px的标签和一个CGPath，它也很小？
这是一个地图应用
下面是一些代码：
//Display the map image
- (void)displayTiledImageNamed:(NSString *)imageName size:(CGSize)imageSize {
self.zoomScale = 1.0;
container = [[UIView alloc] initWithFrame:(CGRect){ CGPointZero, imageSize }];
_zoomView = [[UIImageView alloc] initWithFrame:(CGRect){ CGPointZero, imageSize }];
NSString *path = [NSString stringWithFormat:@"%@/%@-Small.png",[[NSBundle mainBundle] bundlePath], [imageName stringByDeletingPathExtension]];
UIImage *zoomImage = [UIImage imageWithContentsOfFile:path];
[_zoomView setImage:zoomImage];
[container addSubview:_zoomView];
[_zoomView release];
_tilingView = [[UMTileView alloc] initWithImageName:imageName size:imageSize];
_tilingView.frame = _zoomView.bounds;
[_zoomView addSubview:_tilingView];
[_tilingView release];
[self configureForImageSize:imageSize];
//This is the view that's causing the crash and memory warnings
//If this view is commented out the app functions just fine
UMMapContentView *m = [[UMMapContentView alloc] initWithFrame:CGRectMake(0,0,imageSize.width,imageSize.height) andColors:self.colors mapView:self.mapView];
self.contentView = m;
[container addSubview:self.contentView];
[m release];
[self addSubview:container];
[container release];
}
这是上面的UMMapContentView视图内的另一个子视图这是我的路视图类：
+ (Class)layerClass {
return [CATiledLayer class];
}
+ (CFTimeInterval)fadeDuration {
return 0.0;
}
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
self.userInteractionEnabled = NO;
self.backgroundColor = [UIColor clearColor];
}
return self;
}
- (void)dealloc {
self.path = nil;
self.pathColor = nil;
[super dealloc];
}
- (void)resetPathView {
CATiledLayer *tiledLayer = (CATiledLayer*)self.layer;
tiledLayer.contents = nil;
[tiledLayer setNeedsDisplay];
}
- (void)drawPath:(UMPath*)p {
self.path = p;
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect {
if (self.path) {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetStrokeColorWithColor(context, self.pathColor.CGColor);
CGContextSetShadowWithColor(context, CGSizeMake(2.0, 1.0), 1.0, [[UIColor colorWithWhite:0.2 alpha:0.8] CGColor]);
CGContextSetLineWidth(context, 8.0);
CGContextBeginPath (context);
CGContextMoveToPoint (context, ((UMMapPoint*)[self.path.points objectAtIndex: 0]).x, ((UMMapPoint*)[self.path.points objectAtIndex: 0]).y);
for (int i = 1; i < self.path.points.count; i++) {
CGContextAddQuadCurveToPoint (context, ((UMMapPoint*)[self.path.points objectAtIndex:i-1]).x, ((UMMapPoint*)[self.path.points objectAtIndex: i-1]).y, ((UMMapPoint*)[self.path.points objectAtIndex:i]).x, ((UMMapPoint*)[self.path.points objectAtIndex:i]).y);
}
CGContextStrokePath (context);
}
}
这是我的方法将所有UILabel放入UMMapContentView视图中：
- (void)mapAllLabelsInNavigationMap:(int)navigationMap {
//There are 1109 label dictionaries in the labels array
for (NSDictionary *dict in labels) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake([[dict objectForKey:@"X"] floatValue],[[dict objectForKey:@"Y"] floatValue],[[dict objectForKey:@"Width"] floatValue],[[dict objectForKey:@"Height"] floatValue])];
[label setLineBreakMode:NSLineBreakByWordWrapping];
[label setNumberOfLines:0];
[label setBackgroundColor:[UIColor clearColor]];
[label setTextColor:[self colorFromHexString:[dict objectForKey:@"Foreground"]]];
[label setFont:[UIFont systemFontOfSize:[[dict objectForKey:@"FontSize"] floatValue]]];
[label setTextAlignment:NSTextAlignmentCenter];
[label setText:[[UMDataBase shared] stringForID:[[dict objectForKey:@"Texts_ID"] intValue] withLanguage:languageID]];
[self addSubview:label];
[localMapLabels addObject:label];
[label release];
}
}
我真的不知道我需要什么方向头...任何帮助将不胜感激！ :)