在一个UIView中如何使用多个UIPickerView

可以现在storyboard的UIView中拖入多个UIPickerView

然后同样是继承相关的UIPickerView协议

<UIPickerViewDataSource,UIPickerViewDelegate>

接着重写相关方法，在里面加入if判断即可

如下：

 - (void)viewDidLoad
 {
     [super viewDidLoad];

     _checkItemArray=[NSArray arrayWithObjects:@"十二导常规心电",@"test", nil];
     _applyArray=[NSArray arrayWithObjects:@"ECG",@"TEST", nil];
     _applyDocArray=[NSArray arrayWithObjects:@"工程师", @"test",nil];

     self.checkItemPicker.dataSource=self;
     self.applyPicker.dataSource=self;
     self.applyDocPicker.dataSource=self;

     self.checkItemPicker.delegate=self;
     self.applyPicker.delegate=self;
     self.applyDocPicker.delegate=self;

 }

 -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
 {
     return ;
 }

 -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
 {
     if (pickerView==self.checkItemPicker)
     {
         return _checkItemArray.count;
     }
     else
         if (pickerView==self.applyPicker)
         {
             return _applyArray.count;
         }
         else
         {
             return _applyDocArray.count;
         }
 }

 -(UIView*)pickerView:(UIPickerView*)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
 {
     UILabel *myView=nil;

     myView=[[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, , )];
     myView.textAlignment=NSTextAlignmentRight;

     if (pickerView==self.checkItemPicker) {
         myView.text=[_checkItemArray objectAtIndex:row];

     }else if(pickerView==self.applyPicker){
         myView.text=[_applyArray objectAtIndex:row];
     }else{
         myView.text=[_applyDocArray objectAtIndex:row];
     }
     myView.font=[UIFont systemFontOfSize:];
     myView.textColor=[UIColor blackColor];
     myView.backgroundColor=[UIColor clearColor];
     return  myView;

 }