//联系人:石虎QQ: 1224614774昵称:嗡嘛呢叭咪哄
一.UIPickerView
1.UIPickerView的常见属性
//数据源(用来告诉UIPickerView有多少列多少行)
@property(nonatomic,assign)id dataSource;
//代理(用来告诉UIPickerView每1列的每1行显示什么内容,监听UIPickerView的选择)
@property(nonatomic,assign)id delegate;
//是否要显示选中的指示器
@property(nonatomic)BOOLshowsSelectionIndicator;
//一共有多少列
@property(nonatomic,readonly) NSInteger numberOfComponents;
2.UIPickerView的常见方法
//重新刷新所有列
- (void)reloadAllComponents;
//重新刷新第component列
- (void)reloadComponent:(NSInteger)component;
//主动选中第component列的第row行
- (void)selectRow:(NSInteger)row inComponent:(NSInteger)component animated:(BOOL)animated;
//获得第component列的当前选中的行号
- (NSInteger)selectedRowInComponent:(NSInteger)component;
3.数据源方法(UIPickerViewDataSource)
//一共有多少列
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
//第component列一共有多少行
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
4.代理方法(UIPickerViewDelegate)
//第component列的宽度是多少
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component;
//第component列的行高是多少
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component;
//第component列第row行显示什么文字
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
//第component列第row行显示怎样的view(内容)
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;
//选中了pickerView的第component列第row行
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component;
二.UIDatePicker
1.常见属性
// datePicker的显示模式
@property(nonatomic) UIDatePickerMode datePickerMode;
//显示的区域语言
@property(nonatomic,retain) NSLocale *locale;
2.监听UIDatePicker的选择
*因为UIDatePicker继承自UIControl,所以通过addTarget:...监听
三.程序启动的完整过程
1.main函数
2.UIApplicationMain
*创建UIApplication对象
*创建UIApplication的delegate对象
3.delegate对象开始处理(监听)系统事件(没有storyboard)
*程序启动完毕的时候,就会调用代理的application:didFinishLaunchingWithOptions:方法
*在application:didFinishLaunchingWithOptions:中创建UIWindow
*创建和设置UIWindow的rootViewController
*显示窗口
3.根据Info.plist获得最主要storyboard的文件名,加载最主要的storyboard(有storyboard)
*创建UIWindow
*创建和设置UIWindow的rootViewController
*显示窗口
谢谢!!!