OC学习笔记之011IOS应用开发入门--控件2进度条、拖动条、警告框、日期选择器、选择器
1.进度条-UIProgressView
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIProgressView *progress1;
@property (weak, nonatomic) IBOutlet UIProgressView *progress3;
@property (weak, nonatomic) IBOutlet UIProgressView *progress2;
- (IBAction)tapped:(id)sender;
@end
@implementation ViewController{
//定义一个计时器
NSTimer* _timer;
//定义一个变量，记录当前的进度值
CGFloat _progVal;
}
- (void)viewDidLoad {
[super viewDidLoad];
//创建可拉伸图片，指定对no.gif图片整体进行平铺
UIImage* trackImage=[[UIImage imageNamed:@"no.png"]resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeTile];
//创建可拉伸图片，指定对ok.gif图片整体进行平铺
UIImage* progressImage=[[UIImage imageNamed:@"ok.png"]resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeTile];
//自定义第三个进度条的外观
self.progress3.trackImage=trackImage;
self.progress3.progressImage=progressImage;
}
- (IBAction)tapped:(id)sender {
_progVal=0;
//启动计时器，控制每隔0.2秒调用一次changeprogeress方法
_timer=[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(changeProgress) userInfo:nil repeats:YES];
}
-(void)changeProgress{
//进度值增加0.01
_progVal+=0.01;
if (_progVal>=1.0) {
[_timer invalidate];
}else{
//同时改变三个进度条的进度值
[self.progress1 setProgress:_progVal animated:YES];
[self.progress2 setProgress:_progVal animated:YES];
[self.progress3 setProgress:_progVal animated:YES];
}
}
@end
2.进度条-UIActivitydicatorView
#import "ViewController.h"
@interface ViewController ()
//四个indicator控件绑定到一个属性集合上
@property (strong, nonatomic) IBOutletCollection(UIActivityIndicatorView) NSArray *progress;
- (IBAction)start:(id)sender;
- (IBAction)stop:(id)sender;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor=[UIColor grayColor];
}
- (IBAction)stop:(id)sender {
}
- (IBAction)start:(id)sender {
for (int i=0; i<self.progress.count; i++) {
[self.progress[i] startAnimating];
}
}
@end
3.拖动条-UISlider
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *myimage;
- (IBAction)changed:(UISlider *)sender;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//创建可拉伸图片
UIImage* oneImage=[[UIImage imageNamed:@"11.jpeg"]resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeTile];
self.myimage.image=oneImage;
}
- (IBAction)changed:(UISlider *)sender {//这里参数是UISlider类
[self.myimage setAlpha:sender.value];
}
@end
4.警告框–UIAlertView(在IOS9中被废弃，不学)
5.警告框–UIActionSheet(在IOS9中被废弃，不学)
6.日期选择器–UIDatePicker
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIDatePicker *myDate;
- (IBAction)tapped:(id)sender;
@property (weak, nonatomic) IBOutlet UILabel *myTimeLabel;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)tapped:(id)sender {
//获取用户通过UIDatePicker设置的日期和时间
NSDate* selected=[self.myDate date];
//创建一个日期格式器
NSDateFormatter* dateFormatter=[[NSDateFormatter alloc]init];
//为日期格式器设置格式字符串
[dateFormatter setDateFormat:@"yyyy年MM月dd日 HH:mm +0800"];
//使用日期格式化器格式化日期时间
NSString *destDateString=[dateFormatter stringFromDate:selected];
//输出的文字
NSString* message=[NSString stringWithFormat:@"您选择的时间是:%@",destDateString ];
self.myTimeLabel.text=message;
}
@end
7.日期选择器–UIDatePicker–倒计时器
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *showInfo;
@property (weak, nonatomic) IBOutlet UIDatePicker *countDown;
@property (weak, nonatomic) IBOutlet UIButton *startBn;
- (IBAction)tapped:(id)sender;
@end
@implementation ViewController
{
NSTimer* _timer;
NSInteger _leftSeconds;
}
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)tapped:(id)sender {
//获取该倒计时器的剩余时间
_leftSeconds=self.countDown.countDownDuration;
//禁用UIDatePicker控件和按钮
self.countDown.enabled=NO;
[sender setEnabled:NO];
//初始化一个字符串
NSString* message=[NSString stringWithFormat:@"开始倒计时？还剩下%ld秒",_leftSeconds ];
self.showInfo.text=message;
//启动定时器，控制间隔每隔60秒执行一次tickDown方法
_timer=[NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(tickeDown) userInfo:nil repeats:YES];
}
-(void)tickeDown{
//剩余时间减少60秒
_leftSeconds-=5;
//修改倒计时器的剩余时间
self.countDown.countDownDuration=_leftSeconds;
NSString* message=[NSString stringWithFormat:@"开始倒计时？还剩下%ld秒",_leftSeconds ];
self.showInfo.text=message;
if (_leftSeconds<=0) {
//取消定时器
[_timer invalidate];
//启用倒计时控件和开始按钮控件
self.countDown.enabled=YES;
self.startBn.enabled=YES;
}
}
@end
8.选择器–UIPickerView–单列选择器
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIPickerView *picker;
@property (weak, nonatomic) IBOutlet UILabel *showInfo;
@end
@implementation ViewController{
NSArray* _books;
}
- (void)viewDidLoad {
[super viewDidLoad];
// 创建并初始化nsarray对象
_books=@[@"疯狂android讲义",@"疯狂IOS讲义",@"疯狂swift讲义",@"疯狂XML讲义",@"疯狂java讲义"];
//为UIPickerView设置DataSource和delegate
//self.showInfo.text=_books[1];
self.picker.dataSource = self;
self.picker.delegate = self;
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件包含多少列
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView{
return 1;//表明该控件只包含一列
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件指定列包含多少个列表项
-(NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component{
//由于控件只有一列，不需要管component的值
//返回books数组的大小
return _books.count;//表明该控件只包含一列
}
//UIPickerViewDelegate中定义的方法，该方法返回的nsstring将作为UIPickerView中指定列和列表项标题文本
-(NSString*)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent :(NSInteger)component{
//由于控件只有一列，不需要管component的值
//根据row参数返回books数组中的元素，row参数代表列表项的编号
return _books[row];
}
//选中DataSource第几列、第几项时激发的方法
-(void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
self.showInfo.text=_books[row];
}
@end
9.选择器–UIPickerView–多列选择器
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIPickerView *picker;
@property (weak, nonatomic) IBOutlet UILabel *showInfo;
@property (weak, nonatomic) IBOutlet UILabel *mylist;
@end
@implementation ViewController{
NSArray* _books;
NSArray* _authors;
}
- (void)viewDidLoad {
[super viewDidLoad];
// 创建并初始化nsarray对象
_authors=@[@"泰戈尔",@"纪伯伦",@"托尔斯泰"];
_books=@[@"疯狂android讲义",@"疯狂IOS讲义",@"疯狂swift讲义",@"疯狂XML讲义",@"疯狂java讲义"];
//为UIPickerView设置DataSource和delegate
//self.showInfo.text=_books[1];
self.picker.dataSource = self;
self.picker.delegate = self;
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件包含多少列
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView{
return 2;//表明该控件只包含一列
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件指定列包含多少个列表项
-(NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component{
//按照列数返回各个数组中的元素个数
@try {
switch (component) {
case 0:
return _authors.count;
break;
case 1:
return _books.count;
break;
default:
break;
}
} @catch (NSException *exception) {
NSLog(@"%@",exception);
}
}
//UIPickerViewDelegate中定义的方法，该方法返回的nsstring将作为UIPickerView中指定列和列表项标题文本
-(NSString*)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent :(NSInteger)component{
//按照列数返回各个数组中的元素值
@try {
switch (component) {
case 0:
return _authors[row];
break;
case 1:
return _books[row];
break;
default:
break;
}
} @catch (NSException *exception) {
NSLog(@"%@",exception);
}
}
//选中DataSource第几列、第几项时激发的方法
-(void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
if (component==0) {
self.mylist.text=@"作者";
}else{
self.mylist.text=@
"图书";
}
self.showInfo.text=_books[row];
}
@end
10.选择器–UIPickerView–相互依赖的多列选择器
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIPickerView *picker;
@property (weak, nonatomic) IBOutlet UILabel *showInfo;
@property (weak, nonatomic) IBOutlet UILabel *mylist;
@end
@implementation ViewController{
NSDictionary* _books;
NSArray* _authors;
//保存当前选中的作者
NSString* _selectAuthor;
}
- (void)viewDidLoad {
[super viewDidLoad];
// 创建并初始化nsarray对象
_books = @{
@"泰戈尔":@[@"飞鸟集",@"园丁集"],
@"冯梦龙":@[@"醒世恒言",@"喻世明言",@"警世通言"],
@"李刚":@[@"疯狂android讲义",@"疯狂IOS讲义",@"疯狂JAVA讲义",@"疯狂XML讲义"]
};
//使用_authors保存_books所有key组成的NSArray排序后的结果
_authors=[[_books allKeys] sortedArrayUsingSelector:@selector(compare:)];
//设置默认选中的作者的_authors中的第一个元素
_selectAuthor=_authors[0];
//为UIPickerView设置DataSource和delegate
self.picker.dataSource = self;
self.picker.delegate = self;
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件包含多少列
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView{
return 2;//表明该控件只包含2列
}
//UIPickerViewDataSource中定义的方法，该方法的返回值决定该控件指定列包含多少个列表项
-(NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component{
//按照列数返回各个数组中的元素个数
if (component==0) {
return _authors.count;
}
//如果有其他列返回——books中_selectedAuthor对应的nsarray中元素的个数
return [_books[_selectAuthor] count];
}
//UIPickerViewDelegate中定义的方法，该方法返回的nsstring将作为UIPickerView中指定列和列表项标题文本
-(NSString*)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent :(NSInteger)component{
//按照列数返回各个数组中的元素值
if (component==0) {
//第一列由_authors集合元素决定
return _authors[row];
}
//如果是其他列返回选中处的元素
return [_books[_selectAuthor] objectAtIndex:row];
}
//选中DataSource第几列、第几项时激发的方法
-(void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
if (component==0) {
//改变被选中的作者
_selectAuthor=_authors[row];
//控制重写加载第二个列表，根据选中的走着来加载第二个列表
[self.picker reloadComponent:1];
}
NSArray* temp= component==0?_authors:_books[_selectAuthor];
NSString* tip=component==0?@"作者":@"图书";
//显示
self.mylist.text=tip;
self.showInfo.text=temp[row];
}
@end
11.选择器–UIPickerView–自定义选择器视图
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIPickerView *picker;
@property (weak, nonatomic) IBOutlet UIImageView *myImage;
@property (weak, nonatomic) IBOutlet UIButton *startBn;
- (IBAction)tapped:(id)sender;
@end
@implementation ViewController
{
UIImage* _lostImage;
UIImage* _winImage;
//保存系统中所有图片的集合
NSArray* _images;
//定义两个声音
//AVAudioPlayer * winSound;
//AVAudioPlayer * crunchSound;
}
- (void)viewDidLoad {
[super viewDidLoad];
_lostImage=[UIImage imageNamed:@"lost.png"];
_winImage=[UIImage imageNamed:@"win.png"];
//依次加载6张图片，生成对应的UIImage对象
UIImage* img11=[UIImage imageNamed:@"11.png"];
UIImage* img12=[UIImage imageNamed:@"12.png"];
UIImage* img13=[UIImage imageNamed:@"13.png"];
UIImage* img14=[UIImage imageNamed:@"14.png"];
UIImage* img15=[UIImage imageNamed:@"15.png"];
UIImage* img16=[UIImage imageNamed:@"16.png"];
//初始化——images集合，将前面的6张图片封装成_image集合
_images=@[img11,img12,img13,img14,img15,img16];
//禁用用户交互
self.picker.userInteractionEnabled=NO;
//设置数据源和委托
self.picker.dataSource=self;
self.picker.delegate=self;
}
//重写dataSource中的方法
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView{
return 5;//控件包含5列
}
//该方法返回值决定该控件指定列包含多少个列表项
-(NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component{
return _images.count;
}
#define kImageTag 1
//返回delegete的方法，返回指定列和列表项的UI控件
-(UIView*)pickerView:(UIPickerView*)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
if (view.tag!=kImageTag) {
view=[[UIImageView alloc]initWithImage:_images[row]];
//为该view设置tag属性
view.tag=kImageTag;
//设置不允许交互
view.userInteractionEnabled=NO;
}
return view;
}
//返回列表项的高度
-(CGFloat)pickerView:(UIPickerView*)pickerView rowHeightForComponent:(NSInteger)component{
return 40;
}
//返回列表项的宽度
-(CGFloat)pickerView:(UIPickerView*)pickerView widthForComponent:(NSInteger)component{
return 40;
}
- (IBAction)tapped:(id)sender {
//禁用按钮
self.startBn.enabled=NO;
self.myImage.image=nil;//清空见面上myImage控件的图片
//定义一个nsmutableDictionary来记录每个随机数出现的次数
NSMutableDictionary* result=[[NSMutableDictionary alloc]initWithCapacity:6];
for (int i=0; i<5; i++) {
//生成0-_images.count之间的 一个随机数
int selectedVal=arc4random()%_images.count;
[self.picker selectRow:selectedVal inComponent:i animated:YES];
if ([result objectForKey:[NSNumber numberWithInt:selectedVal]]) {
//获取result中概随机数出现的次数
NSInteger newCount=[result [[NSNumber numberWithInt:selectedVal]] intValue];
//将获取到的随机数+1
[result setObject:[NSNumber numberWithLong:(newCount+1)] forKey:[NSNumber numberWithInt:selectedVal]];
}else{
//s使用reslut记录随机数的出现次数为1
[result setObject:[NSNumber numberWithInt:1] forKey:[NSNumber numberWithInt:selectedVal]];
}
//使用result记录随机数的最大出现次数
NSUInteger maxOccurs=1;
for (NSNumber* num in [result allKeys]){
//只要热河随机数的出现次数大于maxOccurs
if ([[result objectForKey:num] integerValue]>maxOccurs) {
//使用maxOccurs保存概随机数出现的次数
maxOccurs=[[result objectForKey:num]integerValue];
}
}
//如果某个随机数出现的次数大于或等于3，即界面中处出现了3个相同的图片
if (maxOccurs>=3) {
//如果赢了延迟0.5秒执行showWin方法，显示结果
[self performSelector:@selector(showWin) withObject:nil afterDelay:0.5];
}else{
//如果输了延迟0.5秒执行showlsot方法，显示结果
[self performSelector:@selector(showlost) withObject:nil afterDelay:0.5];
}
}
}
-(void)showWin{
self.myImage.image=_winImage;
self.startBn.enabled=YES;
}
-(void)showlost{
self.myImage.image=_lostImage;
self.startBn.enabled=YES;
}
@end
