UIPickerView的使用和项目展示
2016-12-19 18:50
323 查看
今天呢开始给同学们讲解UIPickerView的使用，首先通过一个app中广泛存在的选菜的功能来体现UIPickerView的用法!废话不多说首先看效果图！
//
// ZZPickerView.h
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ZZPickerView :
UIView
- (void)todayMainPush;
@end
//
// ZZPickerView.m
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import "ZZPickerView.h"
@interface
ZZPickerView()<UIPickerViewDelegate,UIPickerViewDataSource>
@property (nonatomic,strong)
NSArray *foods;
@property (nonatomic,weak)
UIImageView *bgImgView;
@property (nonatomic,weak)
UILabel *titleText;
@property (nonatomic,weak)
UIPickerView *foodPicker;
@property (nonatomic,weak)
UILabel *fruitLabel;
@property (nonatomic,weak)
UILabel *mainLabel;
@property (nonatomic,weak)
UILabel *drinkLabel;
@property (nonatomic,weak)
UILabel *text1;
@property (nonatomic,weak)
UILabel *text2;
@property (nonatomic,weak)
UILabel *text3;
@property (nonatomic,weak)
UIButton *arcBtn;
@end
@implementation ZZPickerView
- (NSArray *)foods
{
if (_foods ==nil) {
// 1.获得plist的全路径
_foods = [NSArrayarrayWithContentsOfFile:[[NSBundlemainBundle]
pathForResource:@"foods.plist"ofType:nil]];
}
return_foods;
}
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [superinitWithFrame:frame])
{
[selfsetUpSubViews];
}
returnself;
}
- (instancetype)initWithCoder:(NSCoder *)decoder
{
if (self = [superinitWithCoder:decoder])
{
[selfsetUpSubViews];
}
returnself;
}
/**
* 初始化所有的子控件&进行一次性初始化设置
*/
- (void)setUpSubViews
{
UIImageView *bgImgView = [[UIImageViewalloc]
init];
bgImgView.image = [UIImageimageNamed:@"new_feature_2"];
[selfaddSubview:bgImgView];
self.bgImgView = bgImgView;
UILabel *titleText = [[UILabelalloc]
init];
titleText.text =NSLocalizedString(@"周氏菜谱",nil);
titleText.textAlignment =NSTextAlignmentCenter;
titleText.font = [UIFontboldSystemFontOfSize:18.0f];
titleText.textColor = [UIColorwhiteColor];
[selfaddSubview:titleText];
self.titleText = titleText;
UIPickerView *foodPicker = [[UIPickerViewalloc]
init];
foodPicker.delegate =self;
foodPicker.dataSource =self;
[selfaddSubview:foodPicker];
self.foodPicker = foodPicker;
UILabel *fruitLabel = [[UILabelalloc]
init];
fruitLabel.textAlignment =NSTextAlignmentLeft;
fruitLabel.font = [UIFontboldSystemFontOfSize:16.0f];
fruitLabel.text =NSLocalizedString(@"水果:",nil);
fruitLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:fruitLabel];
self.fruitLabel = fruitLabel;
UILabel *mainLabel = [[UILabelalloc]
init];
mainLabel.textAlignment =NSTextAlignmentLeft;
mainLabel.font = [UIFontboldSystemFontOfSize:16.0f];
mainLabel.text =NSLocalizedString(@"主菜:",nil);
mainLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:mainLabel];
self.mainLabel = mainLabel;
UILabel *drinkLabel = [[UILabelalloc]
init];
drinkLabel.textAlignment =NSTextAlignmentLeft;
drinkLabel.font = [UIFontboldSystemFontOfSize:16.0f];
drinkLabel.text =NSLocalizedString(@"饮料:",nil);
drinkLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:drinkLabel];
self.drinkLabel = drinkLabel;
UILabel *text1 = [[UILabelalloc]
init];
text1.textAlignment =NSTextAlignmentLeft;
text1.font = [UIFontsystemFontOfSize:15.5f];
text1.textColor = [UIColorwhiteColor];
[selfaddSubview:text1];
self.text1 = text1;
UILabel *text2 = [[UILabelalloc]
init];
text2.textAlignment =NSTextAlignmentLeft;
text2.font = [UIFontsystemFontOfSize:15.5f];
text2.textColor = [UIColorwhiteColor];
[selfaddSubview:text2];
self.text2 = text2;
UILabel *text3 = [[UILabelalloc]
init];
text3.textAlignment =NSTextAlignmentLeft;
text3.font = [UIFontsystemFontOfSize:15.5f];
text3.textColor = [UIColorwhiteColor];
[selfaddSubview:text3];
self.text3 = text3;
UIButton *arcBtn = [UIButtonbuttonWithType:UIButtonTypeCustom];
[arcBtn setTitle:NSLocalizedString(@"随机点菜",nil)
forState:UIControlStateNormal];
[arcBtn setTitleColor:[UIColorwhiteColor]
forState:UIControlStateNormal];
[arcBtn addTarget:selfaction:@selector(arcBtnClick)forControlEvents:UIControlEventTouchUpInside];
arcBtn.titleLabel.font = [UIFontboldSystemFontOfSize:16.0];
arcBtn.layer.cornerRadius =5;
arcBtn.layer.masksToBounds =YES;
arcBtn.layer.borderColor = [UIColorwhiteColor].CGColor;
arcBtn.layer.borderWidth =1;
[selfaddSubview:arcBtn];
self.arcBtn = arcBtn;
}
/**
* 拿到真实的尺寸调整子控件的布局
*/
- (void)layoutSubviews
{
[superlayoutSubviews];
self.bgImgView.frame =self.frame;
CGFloat titleTextX =0;
CGFloat titleTextY =30;
CGFloat titleTextW =self.frame.size.width;
CGFloat titleTextH =40;
self.titleText.frame =CGRectMake(titleTextX,
titleTextY, titleTextW, titleTextH);
CGFloat foodPickerX =40;
CGFloat foodPickerY =CGRectGetMaxY(self.titleText.frame);
CGFloat foodPickerW = titleTextW;
CGFloat foodPickerH =self.frame.size.height
*0.5;
self.foodPicker.frame =CGRectMake(foodPickerX,
foodPickerY, foodPickerW, foodPickerH);
CGFloat fruitLabelX =15;
CGFloat fruitLabelY =CGRectGetMaxY(self.foodPicker.frame);
CGFloat fruitLabelW =50;
CGFloat fruitLabelH =40;
self.fruitLabel.frame =CGRectMake(fruitLabelX,
fruitLabelY, fruitLabelW, fruitLabelH);
CGFloat mainLabelX = fruitLabelX;
CGFloat mainLabelY =CGRectGetMaxY(self.fruitLabel.frame);
CGFloat mainLabelW = fruitLabelW;
CGFloat mainLabelH = fruitLabelH;
self.mainLabel.frame =CGRectMake(mainLabelX,
mainLabelY, mainLabelW, mainLabelH);
CGFloat drinkLabelX = fruitLabelX;
CGFloat drinkLabelY =CGRectGetMaxY(self.mainLabel.frame);
CGFloat drinkLabelW = fruitLabelW;
CGFloat drinkLabelH = fruitLabelH;
self.drinkLabel.frame =CGRectMake(drinkLabelX,
drinkLabelY, drinkLabelW, drinkLabelH);
CGFloat text1X =CGRectGetMaxX(self.fruitLabel.frame);
CGFloat text1Y = fruitLabelY;
CGFloat text1W =self.frame.size.width;
CGFloat text1H = fruitLabelH;
self.text1.frame =CGRectMake(text1X,
text1Y, text1W, text1H);
CGFloat text2X = text1X;
CGFloat text2Y = mainLabelY;
CGFloat text2W = text1W;
CGFloat text2H = fruitLabelH;
self.text2.frame =CGRectMake(text2X,
text2Y, text2W, text2H);
CGFloat text3X = text1X;
CGFloat text3Y = drinkLabelY;
CGFloat text3W = text1W;
CGFloat text3H = fruitLabelH;
self.text3.frame =CGRectMake(text3X,
text3Y, text3W, text3H);
CGFloat arcBtnW =80;
CGFloat arcBtnX =self.frame.size.width
-15 - arcBtnW;
CGFloat arcBtnY =CGRectGetMaxY(self.text3.frame)
+ 30;
CGFloat arcBtnH =40;
self.arcBtn.frame =CGRectMake(arcBtnX,
arcBtnY, arcBtnW, arcBtnH);
}
#pragma mark - UIPickerView的数据源方法
/**
* 有多少列
*/
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
returnself.foods.count;
}
/**
* 第component列显示多少行
*/
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
NSArray *subFoods =self.foods[component];
return subFoods.count;
}
#pragma mark - UIPickerView的代理方法
/**
* 显示什么文字
*/
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
returnself.foods[component][row];
}
/**
* 修改字体颜色
*/
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel *label = [[UILabelalloc]
init];
label.text =self.foods[component][row];
label.font = [UIFontboldSystemFontOfSize:17.0f];
label.textColor = [UIColorwhiteColor];
return label;
}
/**
* 随机选菜
*/
- (void)arcBtnClick
{
for (int component =0; component <
self.foods.count; component++) {
// 1.每列的个数
NSInteger count = [self.foods[component]count];
// 2.之前的行号
NSInteger oldRow = [self.foodPickerselectedRowInComponent:component];
// 3.第几行(默认新的行号跟旧的行号一样)
NSInteger row = oldRow;
// 4.如果一样则取出不一样
while (row == oldRow) {
row = arc4random()%count;
}
// 5.pickerView主动选择
[self.foodPickerselectRow:row
inComponent:componentanimated:YES];
// 6.设置label的文字
[selfsetUpTextWith:self.foodPickerrow:row
component:component];
}
}
/**
* 设置文字
*/
- (void)setUpTextWith:(UIPickerView *)foodPicker row:(NSInteger)row component:(NSInteger)component
{
if (component ==0) {
//水果
self.text1.text =self.foods[component][row];
} elseif (component ==
1) { //主菜
self.text2.text =self.foods[component][row];
} elseif (component ==
2) { //饮料
self.text3.text =self.foods[component][row];
}
}
/**
* 默认今日主推
*/
- (void)todayMainPush
{
[selfarcBtnClick];
}
@end
//
// ZZViewController.h
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ZZViewController :
UIViewController
@end
//
// ZZViewController.m
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import "ZZViewController.h"
#import "ZZPickerView.h"
@interface
ZZViewController()
@end
@implementation ZZViewController
- (void)viewDidLoad
{
[superviewDidLoad];
[selfsetUpSubViews];
}
/**
* 初始化子控件
*/
- (void)setUpSubViews
{
ZZPickerView *picker = [[ZZPickerViewalloc]
init];
picker.frame =CGRectMake(0,0,
self.view.frame.size.width,self.view.frame.size.height);
[picker todayMainPush];
[self.viewaddSubview:picker];
}
@end
//
// ZZPickerView.h
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ZZPickerView :
UIView
- (void)todayMainPush;
@end
//
// ZZPickerView.m
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import "ZZPickerView.h"
@interface
ZZPickerView()<UIPickerViewDelegate,UIPickerViewDataSource>
@property (nonatomic,strong)
NSArray *foods;
@property (nonatomic,weak)
UIImageView *bgImgView;
@property (nonatomic,weak)
UILabel *titleText;
@property (nonatomic,weak)
UIPickerView *foodPicker;
@property (nonatomic,weak)
UILabel *fruitLabel;
@property (nonatomic,weak)
UILabel *mainLabel;
@property (nonatomic,weak)
UILabel *drinkLabel;
@property (nonatomic,weak)
UILabel *text1;
@property (nonatomic,weak)
UILabel *text2;
@property (nonatomic,weak)
UILabel *text3;
@property (nonatomic,weak)
UIButton *arcBtn;
@end
@implementation ZZPickerView
- (NSArray *)foods
{
if (_foods ==nil) {
// 1.获得plist的全路径
_foods = [NSArrayarrayWithContentsOfFile:[[NSBundlemainBundle]
pathForResource:@"foods.plist"ofType:nil]];
}
return_foods;
}
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [superinitWithFrame:frame])
{
[selfsetUpSubViews];
}
returnself;
}
- (instancetype)initWithCoder:(NSCoder *)decoder
{
if (self = [superinitWithCoder:decoder])
{
[selfsetUpSubViews];
}
returnself;
}
/**
* 初始化所有的子控件&进行一次性初始化设置
*/
- (void)setUpSubViews
{
UIImageView *bgImgView = [[UIImageViewalloc]
init];
bgImgView.image = [UIImageimageNamed:@"new_feature_2"];
[selfaddSubview:bgImgView];
self.bgImgView = bgImgView;
UILabel *titleText = [[UILabelalloc]
init];
titleText.text =NSLocalizedString(@"周氏菜谱",nil);
titleText.textAlignment =NSTextAlignmentCenter;
titleText.font = [UIFontboldSystemFontOfSize:18.0f];
titleText.textColor = [UIColorwhiteColor];
[selfaddSubview:titleText];
self.titleText = titleText;
UIPickerView *foodPicker = [[UIPickerViewalloc]
init];
foodPicker.delegate =self;
foodPicker.dataSource =self;
[selfaddSubview:foodPicker];
self.foodPicker = foodPicker;
UILabel *fruitLabel = [[UILabelalloc]
init];
fruitLabel.textAlignment =NSTextAlignmentLeft;
fruitLabel.font = [UIFontboldSystemFontOfSize:16.0f];
fruitLabel.text =NSLocalizedString(@"水果:",nil);
fruitLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:fruitLabel];
self.fruitLabel = fruitLabel;
UILabel *mainLabel = [[UILabelalloc]
init];
mainLabel.textAlignment =NSTextAlignmentLeft;
mainLabel.font = [UIFontboldSystemFontOfSize:16.0f];
mainLabel.text =NSLocalizedString(@"主菜:",nil);
mainLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:mainLabel];
self.mainLabel = mainLabel;
UILabel *drinkLabel = [[UILabelalloc]
init];
drinkLabel.textAlignment =NSTextAlignmentLeft;
drinkLabel.font = [UIFontboldSystemFontOfSize:16.0f];
drinkLabel.text =NSLocalizedString(@"饮料:",nil);
drinkLabel.textColor = [UIColorwhiteColor];
[selfaddSubview:drinkLabel];
self.drinkLabel = drinkLabel;
UILabel *text1 = [[UILabelalloc]
init];
text1.textAlignment =NSTextAlignmentLeft;
text1.font = [UIFontsystemFontOfSize:15.5f];
text1.textColor = [UIColorwhiteColor];
[selfaddSubview:text1];
self.text1 = text1;
UILabel *text2 = [[UILabelalloc]
init];
text2.textAlignment =NSTextAlignmentLeft;
text2.font = [UIFontsystemFontOfSize:15.5f];
text2.textColor = [UIColorwhiteColor];
[selfaddSubview:text2];
self.text2 = text2;
UILabel *text3 = [[UILabelalloc]
init];
text3.textAlignment =NSTextAlignmentLeft;
text3.font = [UIFontsystemFontOfSize:15.5f];
text3.textColor = [UIColorwhiteColor];
[selfaddSubview:text3];
self.text3 = text3;
UIButton *arcBtn = [UIButtonbuttonWithType:UIButtonTypeCustom];
[arcBtn setTitle:NSLocalizedString(@"随机点菜",nil)
forState:UIControlStateNormal];
[arcBtn setTitleColor:[UIColorwhiteColor]
forState:UIControlStateNormal];
[arcBtn addTarget:selfaction:@selector(arcBtnClick)forControlEvents:UIControlEventTouchUpInside];
arcBtn.titleLabel.font = [UIFontboldSystemFontOfSize:16.0];
arcBtn.layer.cornerRadius =5;
arcBtn.layer.masksToBounds =YES;
arcBtn.layer.borderColor = [UIColorwhiteColor].CGColor;
arcBtn.layer.borderWidth =1;
[selfaddSubview:arcBtn];
self.arcBtn = arcBtn;
}
/**
* 拿到真实的尺寸调整子控件的布局
*/
- (void)layoutSubviews
{
[superlayoutSubviews];
self.bgImgView.frame =self.frame;
CGFloat titleTextX =0;
CGFloat titleTextY =30;
CGFloat titleTextW =self.frame.size.width;
CGFloat titleTextH =40;
self.titleText.frame =CGRectMake(titleTextX,
titleTextY, titleTextW, titleTextH);
CGFloat foodPickerX =40;
CGFloat foodPickerY =CGRectGetMaxY(self.titleText.frame);
CGFloat foodPickerW = titleTextW;
CGFloat foodPickerH =self.frame.size.height
*0.5;
self.foodPicker.frame =CGRectMake(foodPickerX,
foodPickerY, foodPickerW, foodPickerH);
CGFloat fruitLabelX =15;
CGFloat fruitLabelY =CGRectGetMaxY(self.foodPicker.frame);
CGFloat fruitLabelW =50;
CGFloat fruitLabelH =40;
self.fruitLabel.frame =CGRectMake(fruitLabelX,
fruitLabelY, fruitLabelW, fruitLabelH);
CGFloat mainLabelX = fruitLabelX;
CGFloat mainLabelY =CGRectGetMaxY(self.fruitLabel.frame);
CGFloat mainLabelW = fruitLabelW;
CGFloat mainLabelH = fruitLabelH;
self.mainLabel.frame =CGRectMake(mainLabelX,
mainLabelY, mainLabelW, mainLabelH);
CGFloat drinkLabelX = fruitLabelX;
CGFloat drinkLabelY =CGRectGetMaxY(self.mainLabel.frame);
CGFloat drinkLabelW = fruitLabelW;
CGFloat drinkLabelH = fruitLabelH;
self.drinkLabel.frame =CGRectMake(drinkLabelX,
drinkLabelY, drinkLabelW, drinkLabelH);
CGFloat text1X =CGRectGetMaxX(self.fruitLabel.frame);
CGFloat text1Y = fruitLabelY;
CGFloat text1W =self.frame.size.width;
CGFloat text1H = fruitLabelH;
self.text1.frame =CGRectMake(text1X,
text1Y, text1W, text1H);
CGFloat text2X = text1X;
CGFloat text2Y = mainLabelY;
CGFloat text2W = text1W;
CGFloat text2H = fruitLabelH;
self.text2.frame =CGRectMake(text2X,
text2Y, text2W, text2H);
CGFloat text3X = text1X;
CGFloat text3Y = drinkLabelY;
CGFloat text3W = text1W;
CGFloat text3H = fruitLabelH;
self.text3.frame =CGRectMake(text3X,
text3Y, text3W, text3H);
CGFloat arcBtnW =80;
CGFloat arcBtnX =self.frame.size.width
-15 - arcBtnW;
CGFloat arcBtnY =CGRectGetMaxY(self.text3.frame)
+ 30;
CGFloat arcBtnH =40;
self.arcBtn.frame =CGRectMake(arcBtnX,
arcBtnY, arcBtnW, arcBtnH);
}
#pragma mark - UIPickerView的数据源方法
/**
* 有多少列
*/
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
returnself.foods.count;
}
/**
* 第component列显示多少行
*/
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
NSArray *subFoods =self.foods[component];
return subFoods.count;
}
#pragma mark - UIPickerView的代理方法
/**
* 显示什么文字
*/
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
returnself.foods[component][row];
}
/**
* 修改字体颜色
*/
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel *label = [[UILabelalloc]
init];
label.text =self.foods[component][row];
label.font = [UIFontboldSystemFontOfSize:17.0f];
label.textColor = [UIColorwhiteColor];
return label;
}
/**
* 随机选菜
*/
- (void)arcBtnClick
{
for (int component =0; component <
self.foods.count; component++) {
// 1.每列的个数
NSInteger count = [self.foods[component]count];
// 2.之前的行号
NSInteger oldRow = [self.foodPickerselectedRowInComponent:component];
// 3.第几行(默认新的行号跟旧的行号一样)
NSInteger row = oldRow;
// 4.如果一样则取出不一样
while (row == oldRow) {
row = arc4random()%count;
}
// 5.pickerView主动选择
[self.foodPickerselectRow:row
inComponent:componentanimated:YES];
// 6.设置label的文字
[selfsetUpTextWith:self.foodPickerrow:row
component:component];
}
}
/**
* 设置文字
*/
- (void)setUpTextWith:(UIPickerView *)foodPicker row:(NSInteger)row component:(NSInteger)component
{
if (component ==0) {
//水果
self.text1.text =self.foods[component][row];
} elseif (component ==
1) { //主菜
self.text2.text =self.foods[component][row];
} elseif (component ==
2) { //饮料
self.text3.text =self.foods[component][row];
}
}
/**
* 默认今日主推
*/
- (void)todayMainPush
{
[selfarcBtnClick];
}
@end
//
// ZZViewController.h
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ZZViewController :
UIViewController
@end
//
// ZZViewController.m
// 15－点菜系统
//
// Created by 周昭 on 16/12/19.
// Copyright © 2016年 HT_Technology. All rights reserved.
//
#import "ZZViewController.h"
#import "ZZPickerView.h"
@interface
ZZViewController()
@end
@implementation ZZViewController
- (void)viewDidLoad
{
[superviewDidLoad];
[selfsetUpSubViews];
}
/**
* 初始化子控件
*/
- (void)setUpSubViews
{
ZZPickerView *picker = [[ZZPickerViewalloc]
init];
picker.frame =CGRectMake(0,0,
self.view.frame.size.width,self.view.frame.size.height);
[picker todayMainPush];
[self.viewaddSubview:picker];
}
@end
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- IOS学习之UIPickerView控件的简单使用
- UIPickerView 的使用
- iOS学习之UIPickerView控件的简单使用
- ios-UIPickerView基本使用
- UIPickerView控件简单使用
- iOS学习之UIPickerView控件的简单使用
- UIPickerView的使用
- iOS学习之UIPickerView控件的简单使用
- UIPickerView 的简单使用
- UIPickerView使用
- IOS UIPickerView使用
- UIPickerView 和 UITextField 键盘的混搭使用
- iOS开发入门之UIPickerView控件的简单使用
- iOS开发 点菜系统 使用UIPickerView
- iOS开发 UIPickerView的使用
- UIPickerView入门使用
- obj-c UIPickerView 使用
- iOS学习之UIPickerView控件的简单使用
- iOS学习笔记—— UIPickerView 控件的简单使用
- iOS学习之UIPickerView控件的简单使用