IOS开发中自定义选择框的实现代码

#import 
#import "CYCustomMultiSelectPickerView.h"

 
@interface RootViewController : UIViewController

{
 CYCustomMultiSelectPickerView *multiPickerView;
 UILabel *pickLabel;
}

@end

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (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=@"ALPickerView";
 
 pickLabel=[[UILabel alloc]initWithFrame:CGRectMake(10, 100, 100, 50)];
 pickLabel.backgroundColor=[UIColor orangeColor];
 pickLabel.textAlignment=NSTextAlignmentCenter;
 [self.view addSubview:pickLabel];
}
//随意点击任意处，弹出选择框
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
 [self initPickerView];
}
-(void)initPickerView
{
 for (UIView *view in self.view.subviews) {
  if ([view isKindOfClass:[CYCustomMultiSelectPickerView class]]) {
   [view removeFromSuperview];
  }
 }
 
 multiPickerView = [[CYCustomMultiSelectPickerView alloc] initWithFrame:CGRectMake(0,[UIScreen mainScreen].bounds.size.height - 260-20, 320, 260+44)];
 multiPickerView.backgroundColor = [UIColor clearColor];
 multiPickerView.entriesArray = [NSMutableArray arrayWithObjects:@"one",@"two",@"three",@"four",@"five",@"six",@"seven", nil];
 multiPickerView.entriesSelectedArray = [NSMutableArray arrayWithObject:@"one"];
 multiPickerView.multiPickerDelegate = self;
 
 [self.view addSubview:multiPickerView];
 [multiPickerView pickerShow];

}
#pragma -mark -picker delegate
//点击确定要执行的操作
-(void)returnChoosedPickerString:(NSMutableArray *)selectedEntriesArr
{
 NSLog(@"returnChoosedPickerString");
 
 NSMutableArray* newArray = [NSMutableArray array];
 
 for (NSString* str in selectedEntriesArr) {
  
  [newArray addObject:str];
 }
 NSString *endStr = [newArray componentsJoinedByString:@","];
 
 pickLabel.text=endStr;
 
}

- (void)didReceiveMemoryWarning
{
 [super didReceiveMemoryWarning];
 // Dispose of any resources that can be recreated.
}


@end