IOS代码布局 UIPickerView

Posted 2020-08-16 贾辰

（一）初始化

　　1、创建

UIPickerView * picViewBid = [[UIPickerView alloc]initWithFrame:CGRectMake(rect.size.width/2-10,lblBid.frame.origin.y-40, 150, 120)];

　　2、设置数据源及委托

    picViewBid.delegate = self;
    picViewBid.dataSource = self;

注：需要在.h文件中加<UIPickerViewDelegate>，如：

@interface starViewController<UIPickerViewDelegate>: UIViewController
{
    CGRect rect;
}

@end

　　3、加入视图

[bgTopView addSubview:picViewBid];

（二）委托实现

　　1、设置展示数据：数据以数组的形式保存

-(void)loadData{
    pickerCon = @[@"11",@"222",@"333"];
}

　　2、指定pickerview有几个表盘

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    return 1;
}

　　3、指定每个表盘上有几行数据

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    return 3;
}

　　4、指定每行如何展示数据

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    //    title = pickerCon[row];
    switch (row) {
        case 0:
            return @"6.v";
            break;
        case 1:
            return @"goodshow";
            break;
        case 2:
            return @"sixshow";
        default:
            break;
    }
    return pickerCon[row];
}