iOS开发分段选择滚动选择器

释放双眼,带上耳机,听听看~!

因为在项目中有用到滚动选择滑块切换控制器的控件,之前都是用的别人封装好的,但在使用中总感觉不舒服,对方的库写的也比较乱,所以博主一直想封装一个属于自己的滑动选择器,先看下效果图:
仔细察看的话会发现点击到中间位置时会有个小问题,会反方向滚动一段距离,该问题已修复,直接下载Demo查看即可
这里写图片描述
下面放下代码:

//
//  ScrollSliderView.h
//  滚动导航条页面
//
//  Created by XXX on 16/6/13.
//  Copyright © 2016年 CodingFire. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ScrollSliderView : UIView<UIScrollViewDelegate>
#define VIEWWIDTH [UIScreen mainScreen].bounds.size.width
#define VIEWHEIGHT [UIScreen mainScreen].bounds.size.height
#define RAN_COLOR(CUS_RGB) [UIColor colorWithRed:((float)((CUS_RGB & 0xFF0000) >> 16))/255.0 green:((float)((CUS_RGB & 0xFF00) >> 8))/255.0 blue:((float)(CUS_RGB & 0xFF))/255.0 alpha:1.0f]
/*
*
*初始化数据
*/
-(id)initWithController:(UIViewController *)controller withTitleArray:(NSArray *)titleArray;
/*
*底部ScrollView
*/
@property (nonatomic,strong)UIScrollView *mainScrollView;
/*
*滑块ScrollView
*/
@property (nonatomic,strong)UIScrollView *sliderScrollView;
/*
*存放title的数组
*/
@property (nonatomic,copy)NSArray *dataArray;
/*
*点击或滑动后选中的位置
*/
@property (nonatomic, assign) NSInteger selectIndex;
/*
*所在的控制器
*/
@property (nonatomic,weak)UIViewController *fatherController;
@end
//
//  ScrollSliderView.m
//  滚动导航条页面
//
//  Created by XXX on 16/6/13.
//  Copyright © 2016年 CodingFire. All rights reserved.
//
#import "ScrollSliderView.h"
#import "SubViewController.h"
#import "Cache.h"
@implementation ScrollSliderView
{
Cache *cache;
}
/*
*初始化底部ScrollView
*/
-(UIScrollView *)mainScrollView{
if (!_mainScrollView) {
_mainScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 100, VIEWWIDTH, VIEWHEIGHT-100)];
_mainScrollView.bounces = NO;
_mainScrollView.showsVerticalScrollIndicator = NO;
_mainScrollView.showsHorizontalScrollIndicator = NO;
_mainScrollView.pagingEnabled = YES;
_mainScrollView.backgroundColor = [UIColor lightGrayColor];
_mainScrollView.delegate = self;
}
return _mainScrollView;
}
/*
*初始化self所有的控件
*/
-(id)initWithController:(UIViewController *)controller withTitleArray:(NSArray *)titleArray
{
if (self = [super initWithFrame:[UIScreen mainScreen].bounds]) {
cache = [[Cache alloc]init];
_dataArray = [NSArray arrayWithArray:titleArray];
_fatherController = controller;
[self mainScrollView];
[self addSubview:_mainScrollView];
[self creatSliderScrollView:titleArray];
_mainScrollView.contentSize = CGSizeMake(titleArray.count*VIEWWIDTH, VIEWHEIGHT - 64 - 36);
SubViewController *subVC = [SubViewController new];
subVC.index = 0;
subVC.tilte = _dataArray[0];
subVC.view.frame = CGRectMake(0,0, VIEWWIDTH,_mainScrollView.frame.size.height);
subVC.view.backgroundColor = [UIColor colorWithHue:(arc4random() % 256 / 256.0) saturation:(arc4random() % 128 / 256.0) + 0.5 brightness:(arc4random() % 128) + 0.5 alpha:1];
[_mainScrollView addSubview:subVC.view];
[controller addChildViewController:subVC];
[cache addCacheSelectIndex:0];
}
return self;
}
/*
*创建滑块
*/
- (void)creatSliderScrollView:(NSArray *)array{
_sliderScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0,64, VIEWWIDTH, 36)];
_sliderScrollView.backgroundColor = [UIColor whiteColor];
_sliderScrollView.bounces = NO;
_sliderScrollView.showsHorizontalScrollIndicator = NO;
_sliderScrollView.showsVerticalScrollIndicator = NO;
[self addSubview:_sliderScrollView];
CGFloat spaceWidth = 6;
CGFloat widthContentSize = 0;
for (NSInteger i = 0; i < array.count; i++) {
NSString *titleName = self.dataArray[i];
NSInteger strWidth = [self sizeforWidthWithString:titleName];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
UIView *sliderSign = [[UIView alloc]initWithFrame:CGRectMake(spaceWidth + widthContentSize,33,strWidth + 10,2)];
sliderSign.backgroundColor = RAN_COLOR(0xE43494);
sliderSign.tag = 10000 + i;
btn.frame = CGRectMake(spaceWidth+widthContentSize,2,strWidth + 10,32);
[btn setTitle:titleName forState:UIControlStateNormal];
[btn setTitleColor:RAN_COLOR(0xE43494) forState:UIControlStateSelected];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
btn.titleLabel.font = [UIFont systemFontOfSize:14];
[_sliderScrollView addSubview:btn];
[_sliderScrollView addSubview:sliderSign];
btn.tag = 20000 + i;
if (i == 0) {
btn.selected = YES;
sliderSign.hidden = NO;
}else{
sliderSign.hidden = YES;
}
widthContentSize = strWidth+10+spaceWidth+widthContentSize;
[btn addTarget:self action:@selector(selectIndexTableViewAndCollectionView:) forControlEvents:UIControlEventTouchUpInside];
}
self.sliderScrollView.contentSize = CGSizeMake(widthContentSize + 6, 36);
}
/*
*计算title的长度
*/
-(NSInteger)sizeforWidthWithString:(NSString *)str
{
NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:14]};
CGSize size = [str boundingRectWithSize:CGSizeMake(VIEWWIDTH - 10, 0) options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attribute context:nil].size;
return size.width;
}
/*
*点击滑块按钮响应事件
*/
- (void)selectIndexTableViewAndCollectionView:(UIButton *)sender{
//按钮点击 先把所有的按钮都不选中 滑动条View隐藏
for (NSInteger i = 0; i < _dataArray.count; i++) {
UIButton *btn = (UIButton *)[self viewWithTag:20000 + i];
UIView *sliderSign = (UIView *)[self viewWithTag:10000 + i];
sliderSign.hidden = YES;
btn.selected = NO;
}
NSInteger index = sender.tag - 20000;
self.selectIndex = index;
//选中 为选中状态
sender.selected = YES;
UIView *View = (UIView *)[self viewWithTag:index + 10000];
View.hidden = NO;
UIButton *btnRight = [_sliderScrollView viewWithTag:sender.tag + 1];
UIButton *btnLeft = [_sliderScrollView viewWithTag:sender.tag - 1];
//分页 显示哪个控制器
_mainScrollView.contentOffset = CGPointMake(index*VIEWWIDTH,0);
if ((sender.frame.origin.x + sender.frame.size.width) > VIEWWIDTH - 10){
if (sender.tag != (20000 + _dataArray.count - 1)) {
[UIView animateWithDuration:0.3f animations:^{
self.sliderScrollView.contentOffset = CGPointMake(btnRight.frame.origin.x + btnRight.frame.size.width - VIEWWIDTH, 0);
}];
}
}
else
{
[UIView animateWithDuration:0.3f animations:^{
self.sliderScrollView.contentOffset = CGPointMake(btnLeft.frame.origin.x, 0);
}];
}
if (![cache hasCacheIndex:_selectIndex]) {
[self addSubController];
}
}
/*
*创建未创建的滑块对应控制器
*/
-(void)addSubController
{
SubViewController *subVC = [SubViewController new];
subVC.index = _selectIndex;
subVC.tilte = _dataArray[_selectIndex];
[_mainScrollView addSubview:subVC.view];
subVC.view.frame = CGRectMake(_selectIndex*VIEWWIDTH,0, VIEWWIDTH,_mainScrollView.frame.size.height);
subVC.view.backgroundColor = [UIColor colorWithHue:(arc4random() % 256 / 256.0) saturation:(arc4random() % 128 / 256.0) + 0.5 brightness:(arc4random() % 128) + 0.5 alpha:1];
[_mainScrollView addSubview:subVC.view];
[_fatherController addChildViewController:subVC];
}
/*
*UIScrollViewDelegate,控制滑动后变化
*/
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
NSInteger index = scrollView.contentOffset.x/VIEWWIDTH;
_selectIndex = index;
for (NSInteger i = 0; i < _dataArray.count; i++) {
UIButton *btn = (UIButton *)[self viewWithTag:20000 + i];
UIView *downSliderView = (UIView *)[self viewWithTag:10000 + i];
if (index == i) {
downSliderView.hidden = NO;
btn.selected = YES;
}else{
downSliderView.hidden = YES;
btn.selected = NO;
}
}
UIButton *btnRight = [_sliderScrollView viewWithTag:index + 1 + 20000];
UIButton *btnCenter = [_sliderScrollView viewWithTag:index + 20000];
UIButton *btnLeft = [_sliderScrollView viewWithTag:index - 1 + 20000];
//分页 显示哪个控制器
_mainScrollView.contentOffset = CGPointMake(index * VIEWWIDTH,0);
if ((btnCenter.frame.origin.x + btnCenter.frame.size.width) > VIEWWIDTH - 10){
if (btnCenter.tag != (20000 + _dataArray.count - 1)) {
[UIView animateWithDuration:0.3f animations:^{
_sliderScrollView.contentOffset = CGPointMake(btnRight.frame.origin.x + btnRight.frame.size.width - VIEWWIDTH, 0);
}];
}
}
else
{
[UIView animateWithDuration:0.3f animations:^{
_sliderScrollView.contentOffset = CGPointMake(btnLeft.frame.origin.x, 0);
}];
}
if (![cache hasCacheIndex:_selectIndex]) {
[self addSubController];
}
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end

这里便是核心代码,另外还有个储存控制器的类,不再列出来了。这里博主写的比较传统,并没有进行高度的封装,很多属性没有单独留出来,也怪博主懒,也是给大家提供一个发挥的空间,如果有什么疑问和不合理的地方,欢迎留言,代码下载地址请看:https://github.com/codeliu6572/ScrollSelector

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