Question

我正在尝试在ImageView控件上添加一个子视图，我认为，我正确地分配了视图和dealloc视图。这是我的代码。

for(int Count =0; Count < [list count]; Count++)
    {
        MapCallout *callout = [list objectAtIndex:Count];

        CGSize constSize = { 700.0f, 40.0f };
        NSString * sTmp = [callout.Name stringByAppendingString:@"WW"];
        CGSize textSize = [sTmp sizeWithFont:[UIFont fontWithName:@"Arial-BoldMT" size:25.0] constrainedToSize:constSize lineBreakMode:UILineBreakModeClip];
        int xValue = callout.X;
        int yValue = callout.Y;
        int position = 0;

        UIImage *calloutImage;

        if(callout.Direction==0)
        {
            calloutImage=[UIImage newImageFromResource:@"arrow-0.png"];
            callout.Y=callout.Y-3; position= -3;
        }
        else if(callout.Direction==1)
        {
            calloutImage=[UIImage newImageFromResource:@"arrow-1.png"];
            callout.Y=callout.Y-3; position= -3;
        }
        else if(callout.Direction==2)
        {
            callout.Y=callout.Y + 2;
            calloutImage=[UIImage newImageFromResource:@"arrow_2.png"];
            position= +2;
        }


        CalloutButton *calloutButton = nil;

        int arraySize = [dequeueReusableCallout count] - 1; 
        if(Count > arraySize)
        {
            calloutButton = [[[CalloutButton alloc]initWithFrame:CGRectMake(xValue,
                                                                                          self.tapDetectingImageView.frame.origin.y + yValue ,
                                                                                          textSize.width,40)] autorelease];

            [calloutButton setDelegate:self];

            [dequeueReusableCallout addObject:calloutButton];
        }


        calloutButton = [dequeueReusableCallout objectAtIndex:Count];
        [calloutButton setFrame:CGRectMake(xValue,
                                           self.tapDetectingImageView.frame.origin.y + yValue ,
                                           textSize.width,40)] ;
        [calloutButton  setBackgroundImage:calloutImage andText:callout.Name andYvalue:position];
        calloutButton.tag = callout.ID;
        calloutButton.ViewMapType = [callout.calloutType intValue];
        calloutButton.isLive = callout.isLive;
        calloutButton.isAnimated = callout.isAnimated;
        [self.tapDetectingImageView addSubview:calloutButton];
    }





  //Callout Button Method


-(void) setBackgroundImage:(UIImage*)image andText:(NSString*)text andYvalue:(double)Y
{

    if(!btnCallout)
        btnCallout = [[UIButton alloc] init];
    [btnCallout setFrame:CGRectMake(0, -Y, self.frame.size.width, self.frame.size.height)];
    [btnCallout setBackgroundImage:image forState:UIControlStateNormal];
    [btnCallout addTarget:self action:@selector(CalloutTouch:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:btnCallout];


    if(!lblCallout)
        lblCallout = [[UILabel alloc] init];
    [lblCallout setFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    lblCallout.backgroundColor = [UIColor clearColor];
    lblCallout.font = [UIFont systemFontOfSize:42.0];
    lblCallout.userInteractionEnabled = NO;
    lblCallout.text = text;
    lblCallout.textAlignment =  UITextAlignmentCenter;
    lblCallout.font = [UIFont fontWithName:@"Arial-BoldMT" size:25.0];
    [self addSubview:lblCallout];


}


    [self viewForZoomingInScrollView:self.mapScrollView];

}

如果我多次调用此方法方法，则会发生内存警告并且应用程序崩溃。在这里， [self.tapDetectingImageView addSubview：calloutButton]; 我如果对此语句进行评论，则表明它正常工作。请让我知道我错在哪里。

Answer 1

在将[calloutButton release]数组添加到dequeueReusableCallout之后，应该调用{{1}}，因为数组现在在新分配的实例上有一个保留

内存泄漏在iPhone中添加Subview？

1 个答案: