UIpickerView

忘是亡心i 2022-08-01 06:30 101阅读 0赞

//
    //  UIpickerViewController.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/18.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "UIpickerViewController.h"
    
    @interface UIpickerViewController (){
    
        UILabel *label;
        UIFont *font;
        NSArray *array;
    }
    
    @end
    
    @implementation UIpickerViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        self.view.backgroundColor = [UIColor blackColor];
        [self createView:self.view];
    }
    
    - (void)createView:(id)uiView{
        UIView *view = (UIView *)uiView;
        
        label = [[UILabel alloc] init];
        label.frame = CGRectMake(20, 80, 300, 80);
        label.backgroundColor = [UIColor whiteColor];
        label.textAlignment = NSTextAlignmentCenter;
        label.text = @"请选中你需要的字体";
        
        
        UIPickerView  *picker = [[UIPickerView alloc] init];
        picker.frame = CGRectMake(20, 200, 300, 100);
        picker.backgroundColor = [UIColor orangeColor];
        
        array = [UIFont familyNames];
        picker.delegate = self;
        picker.dataSource = self;
        
        [view addSubview:picker];
        [view addSubview:label];
        
    }
    
    #pragma mark - 
    #pragma mark PickerView function
    /***表示UIPickerVIew一共有几列**/
    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    
        return 1;
    }
    
    /***返回component这一列有多少行数据**/
    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    
        return [array count];
    }
    
    /*返回component列中的row行的里面的字符串**/
    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    
    
        return [array objectAtIndex:row];
    }
    
    /**选中，component列，row行的时候的回调的方法**/
    - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
       
        NSString *fontName = [array objectAtIndex:row];
        label.font = [UIFont fontWithName:fontName size:20.0f];
        label.text = [NSString stringWithFormat:@"字体%@被选中了",fontName];
    
    }
    
    
    
    
    
    @end