IOS代码笔记之下拉菜单效果

本文实例为大家分享了ios下拉菜单的具体代码，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];
}

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。