UITableViewCell - 与以前的单元格内容重叠 [英] UITableViewCell - overlapping with previous cells contents

问题描述

我的表格有这个问题

1. 我有大约20个单元格可以显示


2. 每个单元格的高度约为84px


3. 当我单击没有单元格，我设置了一个背景颜色


4. 前4个单元格确定，但是当我向下滚动并点击第5个单元格时，每个单元格的内容开始与其他一些内容重叠，通常是第1个单元格的内容。

我相信它的一些单元格的可重用性或绘图问题。我不知道如何解决它，我已经检查了我的代码，但我不会改变单元格的内容触摸。

这里是我的代码，将添加一些图片太

   - （CGFloat）tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 return 104; 
} 
  - （NSInteger）tableView：（UITableView *）tableView numberOfRowsInSection：（NSInteger）section {
 
 return [stores count] 
} 
 
  - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath {
 static NSString * CellIdentifier = @Cell; 
 CGRect Label1Frame = CGRectMake（5，5，250，30）; 
 CGRect Label2Frame = CGRectMake（6，42，220，20）; 
 CGRect Label3Frame = CGRectMake（6，62，220，20）; 
 CGRect Label4Frame = CGRectMake（240,56，70，12）; 
 
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：CellIdentifier]; 
 
 if（cell == nil）{
 cell = [[[UITableViewCell alloc] initWithStyle：UITableViewCellStyleValue1 reuseIdentifier：CellIdentifier] autorelease]; 
} else {
 //正在回收单元格，删除旧的编辑字段（如果它包含我们标记的编辑字段之一）
 UIView * viewToCheck = nil; 
 viewToCheck = [cell.contentView viewWithTag：1]; 
 if（！viewToCheck）{
 [viewToCheck removeFromSuperview]; 
 DebugLog（@View removed）; 
} 
} 
 //cell.selectionStyle =UITableViewCellSelectionStyleNone; 
 [cell setSelectedBackgroundView：bgView]; 
 NSInteger row = indexPath.row; 
 UILabel * lblTemp; 
 [[cell contentView] clearsContextBeforeDrawing]; 
 
 //行1 
 
 lblTemp = [[UILabel alloc] initWithFrame：Label1Frame]; 
 lblTemp.tag = 1; 
 lblTemp.text = [[store objectAtIndex：row] objectAtIndex：0]; 
 lblTemp.numberOfLines = 2; 
 lblTemp.font = [UIFont boldSystemFontOfSize：13]; 
 lblTemp.adjustsFontSizeToFitWidth = YES; 
 lblTemp.minimumFontSize = 12; 
 lblTemp.textColor = [UIColor grayColor]; 
 [cell.contentView addSubview：lblTemp]; 
 [lblTemp release]; 
 // Line 2 
 lblTemp = [[UILabel alloc] initWithFrame：Label2Frame]; 
 lblTemp.tag = 2; 
 lblTemp.text = [[store objectAtIndex：row] objectAtIndex：1]; 
 lblTemp.font = [UIFont systemFontOfSize：12]; 
 lblTemp.textColor = [UIColor grayColor]; 
 lblTemp.textAlignment = UITextAlignmentLeft; 
 lblTemp.adjustsFontSizeToFitWidth = YES; 
 lblTemp.minimumFontSize = 12; 
 
 [cell.contentView addSubview：lblTemp]; 
 [lblTemp release]; 
 
 //第3行
 lblTemp = [[UILabel alloc] initWithFrame：Label3Frame]; 
 lblTemp.tag = 3; 
 lblTemp.text = [[store objectAtIndex：row] objectAtIndex：2]; 
 lblTemp.font = [UIFont systemFontOfSize：12]; 
 lblTemp.textColor = [UIColor grayColor]; 
 [cell.contentView addSubview：lblTemp]; 
 [lblTemp release]; 
 //电话按钮
 UIButton * phoneButton = [[UIButton alloc] initWithFrame：CGRectMake（240,16,30,30]]; 
 [phoneButton setBackgroundImage：[UIImage imageNamed：@phone.png] forState：UIControlStateNormal]; 
 [phoneButton setTag：row]; 
 [phoneButton addTarget：self action：@selector（dialNumber :) forControlEvents：UIControlEventTouchUpInside]; 
 [cell.contentView addSubview：phoneButton]; 
 //注释按钮
 UIButton * annotation = [[UIButton alloc] initWithFrame：CGRectMake（274,16,30,30]]; 
 [annotation setTag：row]; 
 [annotation setBackgroundImage：[UIImage imageNamed：@tab.png] forState：UIControlStateNormal]; 
 [annotation addTarget：self action：@selector（openMap :) forControlEvents：UIControlEventTouchUpInside]; 
 [cell.contentView addSubview：annotation]; 
 [annotation release]; 
 //距离标签
 //第3行
 lblTemp = [[UILabel alloc] initWithFrame：Label4Frame]; 
 lblTemp.tag = 4; 
 lblTemp.text = [[store objectAtIndex：row] objectAtIndex：5]; 
 lblTemp.textAlignment = UITextAlignmentCenter; 
 lblTemp.font = [UIFont systemFontOfSize：13]; 
 lblTemp.textColor = [UIColor grayColor]; 
 [lblTemp setAdjustsFontSizeToFitWidth：YES]; 
 [cell.contentView addSubview：lblTemp]; 
 [phoneButton release]; 
 [lblTemp release]; 
 [cell setNeedsLayout]; 
 [cell setNeedsDisplay]; 
 return cell; 
} 
  - （void）tableView：（UITableView *）tableView didSelectRowAtIndexPath：（NSIndexPath *）indexPath {
 
 UITableViewCell * cell = [tableView cellForRowAtIndexPath：indexPath]; 
 for（UILabel * lbl in cell.contentView.subviews）{
 if（[lbl isKindOfClass：[UILabel class]]）{
 lbl.textColor = [UIColor whiteColor]; 
 
} 
} 
 // UITableViewCell * cell1; 
 // NSString * row = [NSString stringWithFormat：@％d，indexPath.row]; 
 svm = [[storesMapView alloc] initWithNibName：@storesMapViewbundle：nil]; 
 [svm initWithXML：stores：indexPath.row]; 
 CGRect theFrame = svm.view.frame; 
 theFrame.origin = CGPointMake（self.view.frame.size.width，0）; 
 svm.view.frame = theFrame; 
 theFrame.origin = CGPointMake（0,0）; 
 theFrame.size = CGSizeMake（320,355）; 
 [UIView beginAnimations：nil context：nil]; 
 [UIView setAnimationDuration：0.3f]; 
 svm.view.frame = theFrame; 
 [UIView commitAnimations]; 
 [subView addSubview：svm.view]; 
 backButton.hidden = NO; 
 
 
} 
  

解决方案

我想出了一些试验和错误;如果这可以帮助一些

$ b

在cellforRowAtIndexPath中，我试图清除所有单元子视图$ p> // TRY TO REMOVE ALL CONTENT
for（UIView * view in cell.contentView.subviews）{
if（[view isKindOfClass：[UIView class]]）{
[view removeFromSuperview];
}
}


如果有人可以指点我更简单的方法

感谢

I have this wierd problem with my table

1. i Have about 20 cells to display
2. Each cell is about 84px in height
3. When i click no the cell, i have set a background colour
4. The first 4 cells are ok, but when i scroll down and click on the 5th cell, the content of each cell starts to overlap with some other content, usually content from 1st 4 cells.

I belive its some cell reusability or drawing issue. Am not sure how to solve it, i have checked through my code, but i am not changing the cell's content on touch.

Here is my code and will add some pics too

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 104;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

     return [stores count];
}

-(UITableViewCell *)tableView:(UITableView *) tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    CGRect Label1Frame = CGRectMake(5, 5, 250, 30);
    CGRect Label2Frame = CGRectMake(6, 42, 220, 20);    
    CGRect Label3Frame = CGRectMake(6, 62, 220, 20);        
    CGRect Label4Frame = CGRectMake(240,56, 70, 12);            

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if(cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease];
    }else{
        // a cell is being recycled, remove the old edit field (if it contains one of our tagged edit fields)
        UIView *viewToCheck = nil;
        viewToCheck = [cell.contentView viewWithTag:1];
        if (!viewToCheck) {
            [viewToCheck removeFromSuperview];
            DebugLog(@"View removed");
        }       
    }
    //cell.selectionStyle=UITableViewCellSelectionStyleNone;
    [cell setSelectedBackgroundView:bgView];    
    NSInteger row=indexPath.row;
    UILabel *lblTemp;
    [[cell contentView] clearsContextBeforeDrawing];

    //Line 1

    lblTemp=[[UILabel alloc] initWithFrame: Label1Frame];
    lblTemp.tag=1;
    lblTemp.text=[[stores objectAtIndex:row] objectAtIndex:0] ;
    lblTemp.numberOfLines=2;
    lblTemp.font = [UIFont boldSystemFontOfSize:13];
    lblTemp.adjustsFontSizeToFitWidth=YES;
    lblTemp.minimumFontSize=12;
    lblTemp.textColor = [UIColor grayColor];
    [cell.contentView addSubview:lblTemp];  
    [lblTemp release];
    //Line 2
    lblTemp = [[UILabel alloc] initWithFrame:Label2Frame];
    lblTemp.tag = 2;
    lblTemp.text=[[stores objectAtIndex:row]objectAtIndex:1];   
    lblTemp.font = [UIFont systemFontOfSize:12];
    lblTemp.textColor = [UIColor grayColor ];
    lblTemp.textAlignment=UITextAlignmentLeft;
    lblTemp.adjustsFontSizeToFitWidth=YES;
    lblTemp.minimumFontSize=12;

    [cell.contentView addSubview:lblTemp];  
    [lblTemp release];

    //Line 3    
    lblTemp = [[UILabel alloc] initWithFrame:Label3Frame];
    lblTemp.tag = 3;
    lblTemp.text=[[stores objectAtIndex:row]objectAtIndex:2];
    lblTemp.font = [UIFont systemFontOfSize:12];
    lblTemp.textColor = [UIColor grayColor ];
    [cell.contentView addSubview:lblTemp];      
    [lblTemp release];
    //Phone button
    UIButton *phoneButton=[[UIButton alloc] initWithFrame:CGRectMake(240,16,30,30)];
    [phoneButton setBackgroundImage:[UIImage imageNamed:@"phone.png"] forState:UIControlStateNormal];
    [phoneButton setTag:row];
    [phoneButton addTarget:self action:@selector(dialNumber:) forControlEvents:UIControlEventTouchUpInside];
    [cell.contentView addSubview:phoneButton];
    //ANnotation button
    UIButton *annotation=[[UIButton alloc] initWithFrame:CGRectMake(274,16,30,30)]; 
    [annotation setTag:row];
    [annotation setBackgroundImage:[UIImage imageNamed:@"tab.png"] forState:UIControlStateNormal];
    [annotation addTarget:self action:@selector(openMap:) forControlEvents:UIControlEventTouchUpInside];    
    [cell.contentView addSubview:annotation];   
    [annotation release];
    //Distance label
    //Line 3    
    lblTemp = [[UILabel alloc] initWithFrame:Label4Frame];
    lblTemp.tag = 4;
    lblTemp.text=[[stores objectAtIndex:row]objectAtIndex:5];   
    lblTemp.textAlignment=UITextAlignmentCenter;
    lblTemp.font = [UIFont systemFontOfSize:13];
    lblTemp.textColor = [UIColor grayColor ];
    [lblTemp setAdjustsFontSizeToFitWidth:YES];
    [cell.contentView addSubview:lblTemp];      
    [phoneButton release];
    [lblTemp release];  
    [cell setNeedsLayout];
    [cell setNeedsDisplay];
    return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewCell *cell=[tableView cellForRowAtIndexPath:indexPath ];   
    for(UILabel *lbl in cell.contentView.subviews){
        if([lbl isKindOfClass:[UILabel class]]){
            lbl.textColor=[UIColor whiteColor];

        }
    }
    //UITableViewCell *cell1;       
    //NSString *row=[NSString stringWithFormat:@"%d",indexPath.row];
    svm = [[storesMapView alloc] initWithNibName:@"storesMapView" bundle:nil];
    [svm initWithXML:stores:indexPath.row];
    CGRect theFrame = svm.view.frame;
    theFrame.origin = CGPointMake(self.view.frame.size.width, 0);
    svm.view.frame = theFrame;
    theFrame.origin = CGPointMake(0,0);
    theFrame.size=CGSizeMake(320,355);
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:0.3f];
    svm.view.frame = theFrame;
    [UIView commitAnimations];
    [subView addSubview:svm.view];
    backButton.hidden=NO;


}

解决方案

I figured it out with some trial and error; if this can help some one

In cellforRowAtIndexPath i tried to clear all the cells subview before drawing the cell

//TRY TO REMOVE ALL CONTENT
    for(UIView *view in cell.contentView.subviews){
        if ([view isKindOfClass:[UIView class]]) {
            [view removeFromSuperview];
        }
    }

I would be happy if someone can point me to some easier way

Thanks

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