#import
@interface ListTableView : UIView
@property (nonatomic, strong) NSMutableArray* listTableArr;//下拉列表数据
@property (nonatomic, copy) NSString* textPlaceholder ;//文本占位符
@property (nonatomic, strong)UIColor* placeholderColor;//占位符的颜色
@property (nonatomic, strong)UIColor* textColor;//文本颜色
@property (nonatomic, strong)UIColor* textBackgroundColor;//文本背景颜色
@property (nonatomic, assign)CGFloat textFont;//文本字体大小
@property (nonatomic, assign)CGFloat textHeight;//文本高度---最终显示的高度--默认30
@end
--------------------------------------------------------------
#import "ListTableView.h"
@interface ListTableView(){
BOOL showList;//是否弹出下拉列表
CGFloat tableListHeight;//下拉列表的高度
CGFloat frameHeight;//frame的高度
}
@property (nonatomic, strong) UITableView* listTable;//下拉列表
@property (nonatomic,strong) UILabel* textLabel;//文本输入框
@end
@implementation ListTableView
- (void)setTextPlaceholder:(NSString *)textPlaceholder{
_textPlaceholder = textPlaceholder;
_textLabel.text = _textPlaceholder;
}
- (void)setPlaceholderColor:(UIColor *)placeholderColor{
_placeholderColor = placeholderColor;
_textLabel.textColor = placeholderColor;
}
- (void)setTextFont:(CGFloat)textFont{
_textFont = textFont;
_textFont = _textFont>0? _textFont:18.0f;
_textLabel.font = [UIFont systemFontOfSize:_textFont];
}
- (void)setTextColor:(UIColor *)textColor{
_textColor = textColor;
_textLabel.textColor =textColor;
}
- (void)setTextBackgroundColor:(UIColor *)textBackgroundColor{
_textBackgroundColor = textBackgroundColor;
_textLabel.backgroundColor = textBackgroundColor;
}
- (void)setTextHeight:(CGFloat)textHeight{
_textHeight = textHeight;
[self initFrame];
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor whiteColor];
showList = NO;//默认不显示下拉框
_listTable = [[UITableView alloc]init];
_listTable.delegate = self;
_listTable.dataSource = self;
_listTable.backgroundColor = [UIColor lightGrayColor];
_listTable.separatorColor = [UIColor lightGrayColor];
_listTable.hidden = YES;
_listTable.tableHeaderView.frame = CGRectZero;
_listTable.tableFooterView.frame = CGRectZero;
[self addSubview:_listTable];
_textLabel = [[UILabel alloc]init];
[self addSubview:_textLabel];
_textLabel.textColor = [UIColor blackColor];
_textLabel.backgroundColor = [UIColor lightGrayColor] ;
_textLabel.textAlignment = NSTextAlignmentCenter;
UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(dropdown)];
_textLabel.userInteractionEnabled = YES;
[_textLabel addGestureRecognizer:tap];
}
return self;
}
- (void)layoutSubviews{
[super layoutSubviews];
[self initFrame];
}
- (void)initFrame{
_textHeight = _textHeight>0? _textHeight:30;
if (self.frame.size.height <200) {
frameHeight = 200;
}else{
frameHeight = self.frame.size.height;
}
tableListHeight = frameHeight-_textHeight;
_textLabel.frame = CGRectMake(0, self.bounds.origin.y, self.frame.size.width, _textHeight);
_listTable.frame = CGRectMake(0, _textLabel.frame.origin.y+_textLabel.frame.size.height, self.frame.size.width, tableListHeight);
}
- (void)dropdown{
if (showList) {//如果下拉框以显示，什么都不做
return;
}else{//如果下拉框尚未显示，则进行显示
CGRect selfFrame = self.frame;
selfFrame.size.height = frameHeight;
[self.superview bringSubviewToFront:self];//把下拉框放到最前面，防止下拉框被别的控件遮住
_listTable.hidden = NO;
showList = YES;//显示下拉框
CGRect TvFrame = _listTable.frame;
TvFrame.size.height = self.listTableArr.count*35;
_listTable.frame = TvFrame;
TvFrame.size.height = tableListHeight;
[UIView beginAnimations:@"ResizeForKeyBoard" context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
self.frame = selfFrame;
_listTable.frame = TvFrame;
[UIView commitAnimations];
}
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_listTableArr count];
}
- (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] ;
}
cell.textLabel.text = [_listTableArr objectAtIndex:[indexPath row]];
cell.textLabel.textColor = _textColor !=nil? _textColor:[UIColor blackColor];
cell.textLabel.font = [UIFont systemFontOfSize:_textFont];
cell.accessoryType = UITableViewCellAccessoryNone;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 35;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
_textPlaceholder = [_listTableArr objectAtIndex:indexPath.row];
_textLabel.text = _textPlaceholder;
_textLabel.textColor = _textColor;
showList = NO;
_listTable.hidden = YES;
CGRect selfFrame = self.frame;
selfFrame.size.height = _textHeight;
self.frame = selfFrame;
CGRect tvFrame = _listTable.frame;
tvFrame.size.height = 0;
_listTable.frame = tvFrame;
}
@end
---------------------------------------------
具体用法：
self.automaticallyAdjustsScrollViewInsets = NO;//防止ListTableView页面下垂
ListTableView* listView = [[ListTableView alloc]init];
[self.view addSubview:listView];
listView.frame = CGRectMake(70, 120, 140, 80);//listView的高度在不设置textHeight的情况下，需大于等于30；设置textHeight的话，需大于等于textHeight
listView.listTableArr = [@[@"1",@"2",@"3",@"5",@"6",@"7"]mutableCopy];
[listView.listTableArr addObject:@"4"];
listView.textColor = [UIColor redColor];//也可不设置，会有默认的
listView.placeholderColor = [UIColor yellowColor];//也可不设置，会有默认的
listView.textBackgroundColor = [UIColor lightGrayColor];//也可不设置，会有默认的
listView.textPlaceholder = @"点击请选择";
listView.textFont = 12.0f;//也可不设置，会有默认的
listView.textHeight = 50;//也可不设置，会有默认30