问题描述
我已经在这个问题上绞尽脑汁一天左右了...我已经搜索了这个论坛以及谷歌和其他博客等，但都无济于事.
I have been racking my brain on this problem for a day or so now... I've searched this forum as well as google and other blogs etc. All to no avail.
我正在做的是创建一个具有多个部分的 UITableView，并且在每个部分中，每一行都有一个不同的 GUI 元素(即设置屏幕)
What i'm doing is creating a UITableView with multiple sections and within each section, each row has a different GUI element (i.e. a settings screen)
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 3;
}
我希望实现的目标是每个部分在不同的单元格中都有不同的 GUI 元素.但是正如您在此屏幕截图中看到的:
and all I'm looking to achieve is that each section to have various GUI elements in various cells. BUT as you can see in this screenshot:
最初一切都看起来应该如此，但是在向上和向下滚动一次后，问题就开始了.元素开始四处移动，向上和向下滚动越多/时间越长，元素移动得越多.
Initially everything appears as it should, but after scrolling UP and DOWN once, the problems begin. Elements begin to shuffle around and the more/longer you scroll UP and DOWN the more the elements move around.
!["UITableView 在部分和行中带有 GUI 元素.错误?故障?无知?"][2]
!["UITableView with GUI elements in sections and rows. Bug? Glitch? Ignorance?"][2]
这是一个错误吗?毛刺?还是无知?(可能是后者) - 除了 GUI 代码之外，我已经删除了所有其他代码，如果这意味着什么，我正在使用 NIB 来创建 UITableView
Is this a bug? glitch? or ignorance? (probably the latter) - I've stripped out all other code except for the GUI code and if it means anything I'm creating the UITableView using a NIB
此外，这是我的 cellForRowAtIndexPath 方法的代码.如果有人能指出我正确的方向或告诉我我做错了什么，我将永远感激不尽.
Also, here's the code for my cellForRowAtIndexPath method. I will be eternally grateful if someone could point me in the right direction or tell me what i'm doing wrong.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell
// desired section
if(indexPath.section == 0) {
//
// Load Settings
//
// button
UIButton * loadButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
loadButton.frame = CGRectMake(0.0, 0.0, 300.0, 44.0);
[loadButton setTitle:@"Load Image" forState:UIControlStateNormal];
[loadButton setTitle:@"Load Image" forState:UIControlStateSelected];
[loadButton addTarget:self action:@selector(loadImage:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:loadButton];
} else if(indexPath.section == 1) {
//
// Mode Settings
//
if(indexPath.row == 0) {
cell.text = [mode objectAtIndex:indexPath.row];
} else if(indexPath.row == 1) {
cell.text = [mode objectAtIndex:indexPath.row];
}
} else if(indexPath.section == 2) {
//
// Marker Settings
//
if(indexPath.row == 0) {
// description text
cell.text = [marker objectAtIndex:indexPath.row];
// switch
UISwitch *markerSwitch = [[UISwitch alloc] initWithFrame:CGRectZero];
cell.accessoryView = markerSwitch;
[markerSwitch setOn:YES animated:NO];
[markerSwitch addTarget:self action:@selector(markerToggle:) forControlEvents:UIControlEventValueChanged];
[markerSwitch release];
} else if(indexPath.row == 1) {
UISlider *markerGridSlider = [[UISlider alloc] initWithFrame:CGRectMake(0.0, 10.0, 284, 10.0)];
cell.accessoryView = markerGridSlider;
markerGridSlider.minimumValueImage = [UIImage imageNamed:@"size_icon_1x1.png"];
markerGridSlider.maximumValueImage = [UIImage imageNamed:@"size_icon_8x8.png"];
[markerGridSlider setMinimumValue:1.0];
[markerGridSlider setMaximumValue:8.0];
markerGridSlider.value = 8.0;
[markerGridSlider addTarget:self action:@selector(markerGrid:) forControlEvents:UIControlEventValueChanged];
[markerGridSlider release];
} else if(indexPath.row == 2) {
UISlider *markerSpacingSlider = [[UISlider alloc] initWithFrame:CGRectMake(0.0, 10.0, 284, 10.0)];
cell.accessoryView = markerSpacingSlider;
markerSpacingSlider.minimumValueImage = [UIImage imageNamed:@"spacing_icon_min.png"];
markerSpacingSlider.maximumValueImage = [UIImage imageNamed:@"spacing_icon_max.png"];
[markerSpacingSlider setMinimumValue:1.0];
[markerSpacingSlider setMaximumValue:(320.0/8.0)];
markerSpacingSlider.value = 1.0;
[markerSpacingSlider addTarget:self action:@selector(markerSpacing:) forControlEvents:UIControlEventValueChanged];
[markerSpacingSlider release];
}
}
return cell;
}
谢谢.
肯
谢谢你的帮助.
也许我没有完全理解你的意思，但我想我已经正确地实施了你的建议.但是我仍然遇到元素交换位置的故障，尽管现在经过大约 5 次以上的向上和向下滑动，我的 UISwitch 现在位于左上角.
maybe i'm not understanding exactly what you mean, but i think i've implemented your suggestions properply. however i still get the glitch of the elements swapping places although now after about 5+ UP and DOWN swipes and my UISwitch is now placed in the top left corner.
这是我更新的代码:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
if([indexPath section] == 0) {
//
// Load Settings
//
// button
UIButton *loadButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] autorelease];
loadButton.frame = CGRectMake(0.0, 0.0, 300.0, 44.0);
[loadButton addTarget:self action:@selector(loadImage:) forControlEvents:UIControlEventTouchUpInside];
[loadButton setTag:1000];
[cell.contentView addSubview:loadButton];
}
if([indexPath section] == 1) {
//
// Mode Settings
//
if([indexPath row] == 0) {
cell.text = [mode objectAtIndex:[indexPath row]];
}
if([indexPath row] == 1) {
cell.text = [mode objectAtIndex:[indexPath row]];
}
}
if([indexPath section] == 2) {
//
// Marker Settings
//
if([indexPath row] == 0) {
// switch
UISwitch *markerSwitch = [[UISwitch alloc] initWithFrame:CGRectZero];
[markerSwitch setOn:YES animated:NO];
[markerSwitch addTarget:self action:@selector(markerToggle:) forControlEvents:UIControlEventValueChanged];
[markerSwitch setTag:3000];
[cell.contentView addSubview:markerSwitch];
[markerSwitch release];
}
if([indexPath row] == 1) {
// slider
UISlider *markerGridSlider = [[UISlider alloc] initWithFrame:CGRectMake(0.0, 10.0, 284, 10.0)];
markerGridSlider.minimumValueImage = [UIImage imageNamed:@"size_icon_1x1.png"];
markerGridSlider.maximumValueImage = [UIImage imageNamed:@"size_icon_8x8.png"];
[markerGridSlider setMinimumValue:1.0];
[markerGridSlider setMaximumValue:8.0];
[markerGridSlider setValue:8.0];
[markerGridSlider addTarget:self action:@selector(markerGrid:) forControlEvents:UIControlEventValueChanged];
[markerGridSlider setTag:3100];
[cell.contentView addSubview:markerGridSlider];
[markerGridSlider release];
}
if([indexPath row] == 2) {
// slider
UISlider *markerSpacingSlider = [[UISlider alloc] initWithFrame:CGRectMake(0.0, 10.0, 284, 10.0)];
markerSpacingSlider.minimumValueImage = [UIImage imageNamed:@"spacing_icon_min.png"];
markerSpacingSlider.maximumValueImage = [UIImage imageNamed:@"spacing_icon_max.png"];
[markerSpacingSlider setMinimumValue:1.0];
[markerSpacingSlider setMaximumValue:(320.0/8.0)];
[markerSpacingSlider setValue:1.0];
[markerSpacingSlider addTarget:self action:@selector(markerSpacing:) forControlEvents:UIControlEventValueChanged];
[markerSpacingSlider setTag:3200];
[cell.contentView addSubview:markerSpacingSlider];
[markerSpacingSlider release];
}
}
} // end cell == nil
// Load
UIButton *loadButton = (UIButton*)[cell.contentView viewWithTag:1000];
[loadButton setTitle:@"Load Image" forState:UIControlStateNormal];
[loadButton setTitle:@"Load Image" forState:UIControlStateSelected];
// Mode
// Marker
UISwitch *markerSwitch = (UISwitch*)[cell.contentView viewWithTag:3000];
UISlider *markerGridSlider = (UISlider*)[cell.contentView viewWithTag:3100];
UISlider *markerSpacingSlider = (UISlider*)[cell.contentView viewWithTag:3200];
return cell;
}
推荐答案
change static NSString *CellIdentifier = @"Cell"; 像:
NSString *CellIdentifier;if(indexPath.section==0){ CellIdentifier= @"Cell";}elseif(indexPath.section==2){ CellIdentifier="Cell2";}
NSString *CellIdentifier;if(indexPath.section==0){ CellIdentifier= @"Cell"; }elseif(indexPath.section==2){ CellIdentifier=@"Cell2"; }
这篇关于UITableView 多个部分，带有 GUI 元素 UIButton、UISwitch 等的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！