详解iOS开发中UIPickerView控件的使用方法

复制代码
#import <UIKit/UIKit.h>

 

@interface ViewController : UIViewController
{
    NSArray *pickerArray;
}
- (IBAction)selectButton:(id)sender;
@property (strong, nonatomic) IBOutlet UIToolbar *doneToolbar;

@property (strong, nonatomic) IBOutlet UIPickerView *selectPicker;
@property (strong, nonatomic) IBOutlet UITextField *textField;
@end

 

4、实现数据源和协议
ViewController.h文件里实现

复制代码
<UIPickerViewDelegate, UITextFieldDelegate,UIPickerViewDataSource>
#import <UIKit/UIKit.h>

 

@interface ViewController : UIViewController<UIPickerViewDelegate, UITextFieldDelegate,UIPickerViewDataSource>
{
    NSArray *pickerArray;
}
- (IBAction)selectButton:(id)sender;
@property (strong, nonatomic) IBOutlet UIToolbar *doneToolbar;

@property (strong, nonatomic) IBOutlet UIPickerView *selectPicker;
@property (strong, nonatomic) IBOutlet UITextField *textField;
@end

ViewController.m文件
复制代码
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    return 1;
}
-(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    return [pickerArray count];
}
-(NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    return [pickerArray objectAtIndex:row];
}

 

-(void)textFieldDidEndEditing:(UITextField *)textField{
    NSInteger row = [selectPicker selectedRowInComponent:0];
    self.textField.text = [pickerArray objectAtIndex:row];
}

上面numberOfComponentsInPickerView返回有几个PickerView ，
textFieldDidEndEditing这个在textField结束编辑时，显示PickerView选择中的数据。