@interface ViewController ()<UIPickerViewDelegate,UIPickerViewDataSource> { UIPickerView * pickerView; NSMutableArray * listPicker; NSMutableArray * listPicker2; } @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. [self CreatUI]; UIButton *back = [UIButton buttonWithType:UIButtonTypeRoundedRect]; back.frame = CGRectMake(20, 60, 40, 40); back.backgroundColor = [UIColor greenColor]; [back addTarget:self action:@selector(backk) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:back]; } -(void)backk{ [self presentViewController:[[RootViewController alloc]init] animated:YES completion:nil]; } -(void)CreatUI{ pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(50, 100, 300, 400)]; //显示选中框 pickerView.showsSelectionIndicator = YES; pickerView.delegate =self; pickerView.dataSource = self; [self.view addSubview:pickerView]; listPicker = [NSMutableArray array]; listPicker2 = [NSMutableArray array]; //dataSoure for (int i =0; i<100; i++) { [listPicker addObject:[NSString stringWithFormat:@"%d",i]]; [listPicker2 addObject:[NSString stringWithFormat:@"%02d",i]]; } } /////相关代理 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 2;//列数 } -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ return listPicker.count;//每列的row个数 } //列宽 -(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{ if (component==0) { return 80; }else{ return 80; } } //高 -(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{ if (component==0) { return 100 ; }else{ return 100; } } //选中行 -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ } //返回当前行的内容 此处将是数组中数值添加到滚动的那个显示兰 批量操作显示的内容 -(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component ==0) { return [NSString stringWithFormat:@"%@ 列",[listPicker objectAtIndex:row]]; }else{ return [NSString stringWithFormat:@"%@ 个",[listPicker objectAtIndex:row]]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
@interface LinkageViewController ()<UIPickerViewDelegate,UIPickerViewDataSource> { UIPickerView * pickerViewv; NSArray * listPicker;//sheng NSArray * listPicker2;//shi } @property(nonatomic,strong) UILabel * label; @end @implementation LinkageViewController - (void)viewDidLoad { [super viewDidLoad]; [self CreatUI]; UIButton *back = [UIButton buttonWithType:UIButtonTypeRoundedRect]; back.frame = CGRectMake(20, 60, 40, 40); back.backgroundColor = [UIColor greenColor]; [back addTarget:self action:@selector(backk) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:back]; } -(void)backk{ [self presentViewController:[[RootViewController alloc]init] animated:YES completion:nil]; } -(void)CreatUI{ pickerViewv = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 400)]; //显示选中框 pickerViewv.showsSelectionIndicator = YES; pickerViewv.delegate =self; pickerViewv.dataSource = self; [self.view addSubview:pickerViewv]; listPicker = [NSMutableArray array]; listPicker2 = [NSMutableArray array]; //读取数据 NSString * path = [[NSBundle mainBundle]pathForResource:@"area" ofType:@"plist"]; listPicker = [NSArray arrayWithContentsOfFile:path]; listPicker2 = [NSArray arrayWithArray:listPicker[0][@"Cities"]]; //Label //label的布局约束 self.label = [[UILabel alloc]initWithFrame:CGRectZero]; self.label.translatesAutoresizingMaskIntoConstraints = NO; self.label.backgroundColor = [UIColor groupTableViewBackgroundColor]; self.label.textColor = [UIColor greenColor]; self.label.font = [UIFont systemFontOfSize:30]; [self.label setTextAlignment:NSTextAlignmentCenter]; [self.view addSubview:self.label]; NSArray * labelTop = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[pickerViewv]-30-[_label(50)]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(pickerViewv,_label)]; NSArray * labelH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-20-[_label]-20-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_label)]; [self.view addConstraints:labelTop]; [self.view addConstraints:labelH]; } /////相关代理 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 2;//列数 } -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ NSInteger rows =0; switch (component) { case 0: rows = listPicker.count; break; case 1: rows = listPicker2.count; default: break; } return rows; } //列宽 -(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{ if (component==0) { return 150; }else{ return 150; } } //高 -(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{ if (component==0) { return 60 ; }else{ return 60; } } //选中行 -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ if (component==0) { listPicker2 = listPicker[row][@"Cities"]; [pickerViewv reloadComponent:1];//刷新第几个 }else{ self.label.text = [NSString stringWithFormat:@"%@%@",listPicker[[pickerViewv selectedRowInComponent:0 ]][@"State"],listPicker2[[pickerViewv selectedRowInComponent:1]][@"city"]]; } } //返回当前行的内容 此处将是数组中数值添加到滚动的那个显示兰 批量操作显示的内容 -(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component ==0) { return listPicker[row][@"State"]; }else{ return listPicker2[row][@"city"]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
@interface CustomViewController ()<UIPickerViewDelegate,UIPickerViewDataSource> { UIPickerView * pickerView; NSMutableArray * listPicker; NSMutableArray * listPicker2; } @end @implementation CustomViewController - (void)viewDidLoad { [super viewDidLoad]; [self CreatUI]; UIButton *back = [UIButton buttonWithType:UIButtonTypeRoundedRect]; back.frame = CGRectMake(20, 60, 40, 40); back.backgroundColor = [UIColor greenColor]; [back addTarget:self action:@selector(backk) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:back]; } -(void)backk{ [self presentViewController:[[RootViewController alloc]init] animated:YES completion:nil]; } -(void)CreatUI{ pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 50, self.view.frame.size.width, self.view.frame.size.height-50)]; //显示选中框 pickerView.showsSelectionIndicator = YES; pickerView.delegate =self; pickerView.dataSource = self; [self.view addSubview:pickerView]; listPicker = [NSMutableArray array]; listPicker2 = [NSMutableArray array]; //dataSoure for (int i =0; i<100; i++) { [listPicker addObject:[NSString stringWithFormat:@"%d",i]]; [listPicker2 addObject:[NSString stringWithFormat:@"%02d",i]]; } } /////相关代理 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 2;//列数 } -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ return listPicker.count;//每列的row个数 } //列宽 -(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{ if (component==0) { return 80; }else{ return 40; } } //高 -(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{ if (component==0) { return 80 ; }else{ return 40; } } //选中行 -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ if (component==0) { //选中第一列。一般刷新第二列 // [pickerViewv reloadComponent:1];//刷新第几个 }else{ //选中第二列。一般输出 } } #pragma mark 给pickerview设置字体大小和颜色等 -(UIView*)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{ //可以自定义label UILabel * pickerlabel = (UILabel*)view; if (!pickerlabel) { pickerlabel = [[UILabel alloc] init]; pickerlabel.adjustsFontSizeToFitWidth = YES; pickerlabel.textAlignment = NSTextAlignmentCenter; [pickerlabel setBackgroundColor:[UIColor lightGrayColor]]; [pickerlabel setFont:[UIFont systemFontOfSize:23]]; } pickerlabel.text = [self pickerView:pickerView titleForRow:row forComponent:component]; return pickerlabel; } //返回当前行的内容 此处将是数组中数值添加到滚动的那个显示兰 批量操作显示的内容 -(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component ==0) { return [NSString stringWithFormat:@"%@ 列",[listPicker objectAtIndex:row]]; }else{ return [NSString stringWithFormat:@"%@ 个",[listPicker objectAtIndex:row]]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end