UIPickerView

UIPickerView是類似於選擇日期的滾動輪
代碼如下

先簽訂UIPickerView的兩個協議,delegate和dataSource,並且定義兩個數組

UIPickerView *pickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0, 30, 375, 289)];
pickerView.backgroundColor = [UIColor redColor];
    [self.view addSubview:pickerView];
    [pickerView release];
  pickerView.delegate = self;
  pickerView.dataSource = self;

self.arr1 = @[@"zhangsna",@"lisi",@"sdf"];
self.arr2 = @[@"123",@"125",@"7497"];

顯示的列數

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    return 2;
}

判斷行數

- (NSinteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    if(component == 0){
        return self.arr1.count;
    }else{
        return self,arr2.count;
    }
}

顯示內容

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    if(component == 0){
        return self.arr1[row];
    }else{
        return self.arr2.[row];
    }
}

點擊方法

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    NSLog(@"%@",self.arr2[row]);

}