自定义提示框，3秒钟后自动消失。如上图显示效果。
提示框加载代码：
- (void)viewDidLoad {
[super viewDidLoad];
//将view背景颜色变更为黄色
self.view.backgroundColor = [UIColor yellowColor];
//在self.view上加载提示框
[[BIDNoteView sharedInstance] showNoteView:@"显示提示信息" subView:self.view];
}BIDNoteView.h 代码：
//
// BIDNoteView.h
// label上画横线
//
// Created by eJiupi on 14-7-23.
// Copyright (c) 2014年 xujinzhong. All rights reserved.
// #import <Foundation/Foundation.h> @interface BIDNoteView : NSObject + (BIDNoteView*)sharedInstance; - (void)showNoteView:(NSString*)noteText subView:(UIView*)subView; -(void)setFont:(UIFont*)font; @end
BIDNoteView.m 实现代码：
//
// BIDNoteView.m
// label上画横线
//
// Created by eJiupi on 14-7-23.
// Copyright (c) 2014年 xujinzhong. All rights reserved.
// #import "BIDNoteView.h" @interface BIDNoteView () //@property (strong, nonatomic) UIView *subView; @property (strong, nonatomic) UIView *noteView;
@property (strong, nonatomic) UILabel *noteLable; @property (strong, nonatomic) NSTimer *timer; @end @implementation BIDNoteView + (BIDNoteView*)sharedInstance
{
static BIDNoteView* instance = nil;
if (instance == nil)
{
instance = [[BIDNoteView alloc] init];
}
return instance;
} - (id)init
{
self = [super init];
if (self)
{
NSInteger w = ;
NSInteger h = ;
NSInteger x = ([UIScreen mainScreen].bounds.size.width-w)/;
NSInteger y = [UIScreen mainScreen].bounds.size.height--h; self.noteView = [[UIView alloc] initWithFrame:CGRectMake(x, y, w, h)];
self.noteView.layer.cornerRadius = 5.0;
self.noteView.backgroundColor = [UIColor colorWithRed: green: blue: alpha:0.6]; self.noteLable = [[UILabel alloc] initWithFrame:CGRectMake(, , w, h)];
self.noteLable.text = @"亲，没有更多商品信息了哦";
self.noteLable.numberOfLines=;
self.noteLable.textColor = [UIColor whiteColor];
self.noteLable.textAlignment = NSTextAlignmentCenter;
self.noteLable.backgroundColor = [UIColor clearColor];
[self.noteView addSubview:self.noteLable];
}
return self;
} -(void)setFont:(UIFont*)font
{
self.noteLable.font=font;
} - (void)showNoteView:(NSString*)noteText subView:(UIView*)subView
{
if (self.timer != nil && [self.timer isValid]) {
[self.timer invalidate];
self.timer = nil;
} if (noteText != nil && [noteText length] > )
self.noteLable.text = noteText; [subView addSubview:self.noteView];
[subView layoutIfNeeded];
self.timer = [NSTimer scheduledTimerWithTimeInterval:1.5 target:self selector:@selector(timerFired:) userInfo:nil repeats:NO];
} - (void)timerFired:(NSTimer*)timer
{
[self.timer invalidate];
//[self setFont:[BIDDeviceFont font_15]];
[self setFont:[UIFont fontWithName:@"Helvetica" size:]];
self.timer = nil;
[self.noteView removeFromSuperview];
} @end