【代码笔记】单项选择框

一，效果图。

二，工程图。

三，代码。

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController //方便跳转到相应的页面
@property (nonatomic , retain) NSString* type; @end

 

RootViewController.m

#import "RootViewController.h"

@interface RootViewController () @end

@implementation RootViewController { int butTag; } @synthesize type; - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization
 } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view.
 self.title=@"选择框"; self.view.backgroundColor=[UIColor orangeColor]; NSArray *array=[NSArray arrayWithObjects:@"学生",@"家长",@"老师", nil]; for (int i = 0; i<3; i++) { //字后面的Label
        UILabel *lab=[[UILabel alloc]initWithFrame:CGRectMake(60+80*i, 100, 50, 15)]; [lab setFont:[UIFont systemFontOfSize:15]]; [lab setTextColor:[UIColor grayColor]]; [lab setBackgroundColor:[UIColor clearColor]]; [lab setText:[array objectAtIndex:i]]; [self.view addSubview:lab]; butTag=100 ; //能点击的小圆点按钮
        UIButton *but=[UIButton buttonWithType:UIButtonTypeCustom]; [but setFrame:CGRectMake(40+80*i, 100, 15, 15)]; [but setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal]; [but setImage:[UIImage imageNamed:@"2"] forState:UIControlStateSelected]; [but addTarget:self action:@selector(choose:) forControlEvents:UIControlEventTouchUpInside]; [but setTag:i+100]; [self.view addSubview:but]; if (butTag == i + 100) { [but setSelected:YES]; [but setUserInteractionEnabled:NO]; } } } //选择角色
- (void)choose:(UIButton *)sender{ UIButton *button = (UIButton *)[self.view viewWithTag:butTag]; [button setSelected:NO]; [button setUserInteractionEnabled:YES]; [sender setUserInteractionEnabled:NO]; [sender setSelected:YES]; int intvalue = (int)sender.tag -100; NSString *typeStr=[NSString stringWithFormat:@"%i",intvalue]; self.type = typeStr; NSLog(@"self.type = %@",self.type); butTag = (int)sender.tag; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.
}

 

四，输出：

2015-10-13 13:59:33.313 选择框[7842:203451] self.type = 1
2015-10-13 13:59:33.921 选择框[7842:203451] self.type = 2
2015-10-13 13:59:34.569 选择框[7842:203451] self.type = 1
2015-10-13 13:59:35.345 选择框[7842:203451] self.type = 0
2015-10-13 13:59:36.897 选择框[7842:203451] self.type = 1