在子类 UITableViewCell 中动态创建子视图
我有一个自定义 UITableViewCell
类,希望线性显示图像和字符串。例如:
第 1 行:[图像 1] 字符串 1 [图像 2] 字符串 2 [图像 3]
第 2 行:[Image4] string3 [Image5]
图像的宽度不同,但我希望间距相等。我该怎么做?我尝试过操作子视图和CGRectMake,但没有成功。
此外,我使用 NSDictionary 来保存内容,并且每个单元格的图像/字符串数量不是恒定的。
我的CustomCell
类:
#import "CustomCell.h"
@implementation CustomCell
@synthesize primaryLabel,secondaryLabel,image1;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
// Initialization code
primaryLabel = [[UILabel alloc]init];
primaryLabel.textAlignment = UITextAlignmentLeft;
primaryLabel.font = [UIFont systemFontOfSize:16];
secondaryLabel = [[UILabel alloc]init];
secondaryLabel.textAlignment = UITextAlignmentLeft;
secondaryLabel.font = [UIFont systemFontOfSize:14];
image1 = [[UIImageView alloc]init];
[self.contentView addSubview:primaryLabel];
[self.contentView addSubview:secondaryLabel];
[self.contentView addSubview:image1];
}
return self;
}
- (void)layoutSubviews {
[super layoutSubviews];
CGRect frame;
frame= CGRectMake(0 ,5, 200, 25);
primaryLabel.frame = frame;
frame= CGRectMake(0 ,30, 200, 25);
secondaryLabel.frame = frame;
frame= CGRectMake(0, 60, 23, 20);
image1.frame = frame;
...
我的RootViewController
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[CustomCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
// Set up the cell...
NSDictionary *dictionary = nil;
//Search
if (tableView == self.searchDisplayController.searchResultsTableView)
{
dictionary = [self.filteredListContent objectAtIndex:indexPath.row];
}
else
{
dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
}
//Original
cell.primaryLabel.text = [dictionary objectForKey:@"Title"];
for (NSArray *keystroke in [dictionary objectForKey:@"Strokes"]) {
for (int i = 0; i < 2; i++) {
if ([(NSString *)keystroke isEqualToString:@"string1"] || [(NSString *)keystroke isEqualToString:@"string2"]) {
cell.secondaryLabel.text = (NSString *)keystroke;
}
else {
NSString *imageFilePath = [NSString stringWithFormat:@"%@.png", keystroke];
NSLog(@"%@", imageFilePath);
UIImage *myimage = [UIImage imageNamed:imageFilePath];
cell.image1.image = myimage;
}
}
}
return cell;
}
...
显然这里有很多漏洞。首先,当我循环浏览字典时,我需要向右移动 CustomCell
子视图,以便可以将图像/文本放置在前一个子视图旁边。
I have a custom UITableViewCell
class and would like to display images and strings linearly. For example:
Row 1: [Image1] string1 [Image2] string2 [Image3]
Row 2: [Image4] string3 [Image5]
The images have varying widths but I would like equal spacing. How would I do this? I have tried manipulating subviews and CGRectMake
to no avail.
Additionally, I am using an NSDictionary
to hold the content and the number of images/string is not constant for each cell.
My CustomCell
class:
#import "CustomCell.h"
@implementation CustomCell
@synthesize primaryLabel,secondaryLabel,image1;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
// Initialization code
primaryLabel = [[UILabel alloc]init];
primaryLabel.textAlignment = UITextAlignmentLeft;
primaryLabel.font = [UIFont systemFontOfSize:16];
secondaryLabel = [[UILabel alloc]init];
secondaryLabel.textAlignment = UITextAlignmentLeft;
secondaryLabel.font = [UIFont systemFontOfSize:14];
image1 = [[UIImageView alloc]init];
[self.contentView addSubview:primaryLabel];
[self.contentView addSubview:secondaryLabel];
[self.contentView addSubview:image1];
}
return self;
}
- (void)layoutSubviews {
[super layoutSubviews];
CGRect frame;
frame= CGRectMake(0 ,5, 200, 25);
primaryLabel.frame = frame;
frame= CGRectMake(0 ,30, 200, 25);
secondaryLabel.frame = frame;
frame= CGRectMake(0, 60, 23, 20);
image1.frame = frame;
...
My RootViewController
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[CustomCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
// Set up the cell...
NSDictionary *dictionary = nil;
//Search
if (tableView == self.searchDisplayController.searchResultsTableView)
{
dictionary = [self.filteredListContent objectAtIndex:indexPath.row];
}
else
{
dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
}
//Original
cell.primaryLabel.text = [dictionary objectForKey:@"Title"];
for (NSArray *keystroke in [dictionary objectForKey:@"Strokes"]) {
for (int i = 0; i < 2; i++) {
if ([(NSString *)keystroke isEqualToString:@"string1"] || [(NSString *)keystroke isEqualToString:@"string2"]) {
cell.secondaryLabel.text = (NSString *)keystroke;
}
else {
NSString *imageFilePath = [NSString stringWithFormat:@"%@.png", keystroke];
NSLog(@"%@", imageFilePath);
UIImage *myimage = [UIImage imageNamed:imageFilePath];
cell.image1.image = myimage;
}
}
}
return cell;
}
...
Obviously there are a lot of holes here. Primarily, as I loop through my dictionary, I need to move my CustomCell
subview right so I can place the images/text next to the previous subview.
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你走在正确的轨道上。在
UITableViewCell
子类中,您需要重写layoutSubviews
,为每个UIImageView
或UILabel 定义
CGRects
手动,并将它们设置为相应视图的框架。查看 CGRectGetMaxX。在这种情况下它将非常有用。
You are on the right track. In your
UITableViewCell
subclass, you will need to overridelayoutSubviews
, defineCGRects
for eachUIImageView
orUILabel
manually, and set them as the respective view's frame.Check out CGRectGetMaxX. It will be very useful in this context.