iOS DropDown下拉按钮效果代码分享

本文实例为大家分享了ios下拉按钮效果展示的具体代码，供大家参考，具体内容如下

一、效果图。

二、工程图。

三、代码。

rootviewcontroller.h

#import <uikit/uikit.h>
@interface rootviewcontroller : uiviewcontroller
@end

rootviewcontroller.m

#import "rootviewcontroller.h"
#import "nidropdown.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=@"dropdown";
  
  uibutton *button=[uibutton buttonwithtype:uibuttontyperoundedrect];
  button.frame=cgrectmake(10, 100, 150,30);
  button.backgroundcolor=[uicolor redcolor];
  [button addtarget:self action:@selector(doclickaction:) forcontrolevents:uicontroleventtouchupinside];
  [self.view addsubview:button];
  
  
  
 
}
-(void)doclickaction:(uibutton *)btn
{
   nsarray *dataarray=[nsarray arraywithobjects:@"1",@"2",@"3",@"4",@"5", nil];
  
  nidropdown *dropdown=[[nidropdown alloc]init];
  [dropdown showdropdown:btn andheight:[dataarray count]*36 anddata:dataarray];
  [self.view addsubview:dropdown];
}
- (void)didreceivememorywarning
{
  [super didreceivememorywarning];
  // dispose of any resources that can be recreated.
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。