#import"ViewController.h"
@interfaceViewController()
@property(nonatomic,strong)UIPickerView*pickerView;
@property(nonatomic,strong)NSArray*pickerViewData;//注意加上这句
@property(nonatomic,strong)NSArray*pickerViewData1;//注意加上这句
@property(nonatomic,strong)NSArray*pickerViewData2;//注意加上这句
@property(nonatomic,strong)UILabel* mylabel;
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
self.mylabel=[[UILabelalloc]initWithFrame:CGRectMake(0,100,self.view.frame.size.width,40)];
[self.viewaddSubview:self.mylabel];
self.pickerView=[[UIPickerViewalloc]initWithFrame:CGRectMake(0,200,self.view.frame.size.width,300)];
self.pickerView.delegate=self;
self.pickerView.dataSource=self;
self.pickerView.showsSelectionIndicator=YES;
[self.viewaddSubview:self.pickerView];
NSArray*array=[[NSArrayalloc]initWithObjects:@"one",
@"two",
@"three",
@"four",
@"five",
nil];
self.pickerViewData= array;//注意一定要写self，否则不对
self.pickerViewData1=@[@"每天",@"爱你",@"多",@"一",@"点"];
self.pickerViewData2=@[@"1",@"2",@"3",@"3",@"4"];
}
//组数
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView
{
return3;
}
//每组元素个数
-(NSInteger)pickerView:(UIPickerView*)pickerView numberOfRowsInComponent:(NSInteger)component
{
if(component==0) {
return[_pickerViewDatacount];
}elseif(component==1){
return[_pickerViewData1count];
}
else{
return[_pickerViewData2count];
}
}
//每个元素的内容
-(UIView*)pickerView:(UIPickerView*)pickerView
titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
if(component==0) {
return[_pickerViewDataobjectAtIndex:row];
}elseif(component==1){
return[_pickerViewData1objectAtIndex:row];
}
else{
return[_pickerViewData2objectAtIndex:row];
}
}
- (void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
if(component==0) {
self.mylabel.text=[self.pickerViewDataobjectAtIndex:row];
NSLog(@"%@",self.mylabel.text);
}
}
- (void)didReceiveMemoryWarning {
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
