IOS自定义无限循环选择器
1、首先引入头文件
#import "CLZoomPickerView.h"
两个代理<CLZoomPickerViewDelegate,CLZoomPickerViewDataSource>
2、画UI
@property(nonatomic,strong)UIImgView *backImageView;
@property(nonatomic,strong)CLZoomPickerView *leftPickerView;
@property(nonatomic,strong)CLZoomPickerView *rightPickerView;
@property(nonatomic,strong)NSMutableArray *leftDataSource;
@property(nonatomic,strong)NSMutableArray *rightDataSource;
#pragma mark 初始化backImageView
_backImageView = [[UIImageView alloc]init];
_backImageView.frame = CGRectMake(0, 0,UI_View_Width,400);
_backImageView.image = [UIImage imageNamed:@"首页背景"];
_backImageView.userInteractionEnabled = YES;
[cell.contentView addSubview:_backImageView];
#pragma mark 初始化PickerView
- (void)initLeftPickerView{
_leftPickerView = [[CLZoomPickerView alloc]init];
_leftPickerView.frame = CGRectMake(0, -40, _backImageView.width/2.0, _backImageView.height+80);
_leftPickerView.dataSource = self;
_leftPickerView.delegate = self;
_leftPickerView.topRowCount = 2;
_leftPickerView.bottomRowCount = 2;
_leftPickerView.selectedRow = 2;
_leftPickerView.rowHeight = _leftPickerView.height/7.0;
_leftPickerView.selectedRowFont = [UIFont systemFontOfSize:35];
_leftPickerView.textColor = [UIColor whiteColor];
_leftPickerView.unselectedRowScale = 0.5;
[_backImageView addSubview:_leftPickerView];
UILabel *yuanLabel = [[UILabel alloc]init];
yuanLabel.frame = CGRectMake(UI_View_Width/2.0-43, _leftPickerView.height/2.0, 15, 15);
yuanLabel.font = [UIFont systemFontOfSize:15];
yuanLabel.textColor = [UIColor whiteColor];
yuanLabel.text = @"元";
[_leftPickerView addSubview:yuanLabel];
}
- (void)initRightPickerView{
_rightPickerView = [[CLZoomPickerView alloc]init];
_rightPickerView.frame = CGRectMake(_backImageView.width/2.0, -40, _backImageView.width/2.0, _backImageView.height+80);
_rightPickerView.dataSource = self;
_rightPickerView.delegate = self;
_rightPickerView.topRowCount = 2;
_rightPickerView.bottomRowCount = 2;
_rightPickerView.selectedRow = 2;
_rightPickerView.rowHeight = _rightPickerView.height/7.0;
_rightPickerView.selectedRowFont = [UIFont systemFontOfSize:35];
_rightPickerView.textColor = [UIColor whiteColor];
_rightPickerView.unselectedRowScale = 0.5;
[_backImageView addSubview:_rightPickerView];
UILabel *tianLabel = [[UILabel alloc]init];
tianLabel.frame = CGRectMake(UI_View_Width/2.0-45-18, _leftPickerView.height/2.0, 15, 15);
tianLabel.font = [UIFont systemFontOfSize:15];
tianLabel.textColor = [UIColor whiteColor];
tianLabel.text = @"天";
[_rightPickerView addSubview:tianLabel];
}
3、准备数据源
NSMutableArray *leftArray = [[NSMutableArray alloc]init];
for (int i=5; i<=50; i++) {
[leftArray addObject:[NSString stringWithFormat:@"%d",i*100]];
}
_leftDataSource = [[NSMutableArray alloc]init];
//数据源需要添加三次实现无缝隙连接
[_leftDataSource addObjectsFromArray:leftArray];
[_leftDataSource addObjectsFromArray:leftArray];
[_leftDataSource addObjectsFromArray:leftArray];
[self initLeftPickerView];
NSMutableArray *rightArray = [[NSMutableArray alloc]init];
if ([HemaFunction xfuncGetAppdelegate].isLogin) {
for (int i=7; i<=30; i++) {
[rightArray addObject:[NSString stringWithFormat:@"%d",i]];
}
_rightDataSource = [[NSMutableArray alloc]init];
[_rightDataSource addObjectsFromArray:rightArray];
[_rightDataSource addObjectsFromArray:rightArray];
[_rightDataSource addObjectsFromArray:rightArray];
[self initRightPickerView];
4、实现代理方法
@property(nonatomic,copy)NSString *loanmoney;
@property(nonatomic,copy)NSString *loanday;
#pragma mark - CLZoomPickerView 代理
// CLZoomPickerView 代理，当前项改变后调用此方法
- (void)pickerView:(CLZoomPickerView *)pickerView changedIndex:(NSUInteger)indexPath
{
if (pickerView==_leftPickerView) {
UILabel *label = (UILabel *)[self.view viewWithTag:99];
label.text = [NSString stringWithFormat:@"￥%@",_leftDataSource[indexPath]];
_loanmoney = _leftDataSource[indexPath];
}
if (pickerView==_rightPickerView) {
_loanday = _rightDataSource[indexPath];
}
}
// CLZoomPickerView 代理，返回数据行数
- (NSInteger)pickerView:(CLZoomPickerView *)pickerView
{
if (pickerView==_leftPickerView) {
return _leftDataSource.count/3;
}else{
return _rightDataSource.count/3;
}
}
// CLZoomPickerView 代理，返回指定行显示的字符串
- (NSString *)pickerView:(CLZoomPickerView *)pickerView titleForRow:(NSUInteger)indexPath
{
if (pickerView==_leftPickerView) {
return _leftDataSource[indexPath];
}else{
return _rightDataSource[indexPath];
}
}
