UIPickerView的基本使用
可以这样写一个基于UIView的分类
#import
typedefvoid(^pickerSeletedEndBlock)(idresult);
@interfaceXHWPickerView :UIView
@property (retain, nonatomic) NSArray *pickerDataArr;
@property (retain, nonatomic) UIPickerView *pickerView;
@property (nonatomic, copy) pickerSeletedEndBlock selectEndBlock;
- (void)popPickerView;
@end
#import "XHWPickerView.h"
#define XHW_W [UIScreen mainScreen].bounds.size.width
#define XHW_H [UIScreen mainScreen].bounds.size.height
#define PICKERVIEW_H300
@interface XHWPickerView()
{
NSIntegerselectRow;
}
@property (retain, nonatomic) UIView *baseView;
@end
@implementation XHWPickerView
- (id)initWithFrame:(CGRect)frame
{
self= [superinitWithFrame:frame];
if(self) {
self.backgroundColor = [UIColor colorWithWhite:0 alpha:0.3];
_baseView = [[UIView alloc] initWithFrame:CGRectMake(0, XHW_H-PICKERVIEW_H, XHW_W, XHW_H)];
_baseView.backgroundColor = [UIColor whiteColor];
[selfaddSubview:_baseView];
UIButton*btnOK = [[UIButtonalloc]initWithFrame:CGRectMake(XHW_H-50,0,40,40)];
[btnOKsetTitle:@"确定" forState:UIControlStateNormal];
[btnOKsetTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btnOKaddTarget:self action:@selector(pickerViewBtnOK:) forControlEvents:UIControlEventTouchUpInside];
[_baseViewaddSubview:btnOK];
UIButton*btnCancel = [[UIButtonalloc]initWithFrame:CGRectMake(10,0,40,40)];
[btnCancelsetTitle:@"取消" forState:UIControlStateNormal];
[btnCancelsetTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btnCanceladdTarget:self action:@selector(pickerViewBtnCancel:) forControlEvents:UIControlEventTouchUpInside];
UIView*lineVie = [[UIViewalloc]init];
[_baseViewaddSubview:lineVie];
lineVie.backgroundColor= [UIColorgrayColor];
lineVie.alpha=0.2;
[lineViemas_makeConstraints:^(MASConstraintMaker*make) {
make.left.right.offset(0);
make.top.equalTo(btnOK.mas_bottom).offset(-1);
make.height.offset(1);
}];
[_baseViewaddSubview:btnCancel];
_pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 40, XHW_W, PICKERVIEW_H-40)];
_pickerView.delegate=self;
_pickerView.dataSource=self;
_pickerView.backgroundColor = [UIColor whiteColor];
[_baseView addSubview:_pickerView];
UITapGestureRecognizer*tapGesture = [[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(dismissPickerView)];
[selfaddGestureRecognizer:tapGesture];
}
return self;
}
#pragma mark - UIPickerViewDataSource
//返回多少列
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView {
return 1;
}
//每列对应多少行
- (NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component {
return _pickerDataArr.count;
}
//每行显示的数据
- (NSString*)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return _pickerDataArr[row];
}
#pragma mark - UIPickerViewDelegate
//选中pickerView的某一行
- (void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
selectRow= row;
}
#pragma mark - Private Menthods
//弹出pickerView
- (void)popPickerView
{
[UIView animateWithDuration:0.5
animations:^{
self.frame=CGRectMake(0,0,XHW_W,XHW_H);
}];
}
//取消pickerView
- (void)dismissPickerView
{
[UIView animateWithDuration:0.5
animations:^{
self.frame=CGRectMake(0,XHW_H,XHW_W,XHW_H);
}];
}
//确定
- (void)pickerViewBtnOK:(id)sender
{
if (self.selectEndBlock) {
self.selectEndBlock(_pickerDataArr[selectRow]);
}
[self dismissPickerView];
}
//取消
- (void)pickerViewBtnCancel:(id)sender
{
if (self.selectEndBlock) {
self.selectEndBlock(nil);
}
[self dismissPickerView];
}
外界使用时
YCPickerView *pickView = [[YCPickerView alloc] init];
pickView.arrPickerData = self.pickerData;
[pickView.pickerView selectRow:2 inComponent:0 animated:YES];
[self.viewaddSubview:pickView];
pickView.frame=self.view.bounds;
[pickViewpopPickerView];
pickView.selectBlock= ^(NSString*str) {
//这里可以拿到选中后的数据
NSLog(@"%@",str);
};
