在开发项目中,UITabBarController下有3个页面,需要对不同的页面进行不同的操作,所以需要知道用户此时在哪个页面上
1、在UITabBarController中声明并使用下面这个代理
//声明代理
@interface TBC_SendPassword ()<UITabBarControllerDelegate>
@end
@implementation TBC_SendPassword
- (void)viewDidLoad {
[super viewDidLoad];
//使用
self.delegate = self;
}
2、使用其代理方法
-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
//当前UITabBarController的位置,从0开始
selectIndex = (int)tabBarController.selectedIndex;
NSLog(@"selectIndex:%d",selectIndex);
}
在开发项目中,需要对用户按下Home键时做出不同的操作
1、直接在代码中使用系统提供的广播监听Home键
//监听是否触发home键挂起程序,(把程序放在后台执行其他操作)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(applicationWillResignActive:)
name:UIApplicationWillResignActiveNotification
object:nil];
//监听是否重新进入程序程序.(回到程序)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(applicationDidBecomeActive:)
name:UIApplicationDidBecomeActiveNotification
object:nil];
2、在回调方法中做出逻辑处理
-(void)applicationWillResignActive:(NSNotification *)notification{ NSLog(@"触发home按下,在该区域书写点击home键的逻辑"); } -(void)applicationDidBecomeActive:(NSNotification *)notification{ NSLog(@"重新进来后响应,该区域编写重新进入页面的逻辑"); }
这里需要注意的是:
1、声明变量
//锁屏监听
#import <notify.h>
#define NotificationLock CFSTR("com.apple.springboard.lockcomplete")
#define NotificationChange CFSTR("com.apple.springboard.lockstate")
#define NotificationPwdUI CFSTR("com.apple.springboard.hasBlankedScreen")
2、在代码中监听锁屏操作
//监听锁屏
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL,
screenLockStateChanged, NotificationLock, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL,
screenLockStateChanged, NotificationChange, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
3、在回调中做出自己的逻辑
#pragma 监听锁屏回调
static void screenLockStateChanged(CFNotificationCenterRef center,void* observer,CFStringRef name,const void* object,CFDictionaryRef userInfo){
NSString* lockstate = (__bridge NSString*)name;
if ([lockstate isEqualToString:(__bridge NSString*)NotificationLock]) {
NSLog(@"锁屏操作");
} else if([lockstate isEqualToString:(__bridge NSString*)NotificationChange]){
NSLog(@"屏幕状态改变");
}
}
这里需要注意的是:
1、定义NSTimer
//定时器
@property (strong,nonatomic)NSTimer *timer;
2、开启定时器
//延时5分钟执行delayMethod
_timer = [NSTimer scheduledTimerWithTimeInterval:300 target:self selector:@selector(delayMethod) userInfo:nil repeats:NO];
3、定义延时操作方法
#pragma 延时操作
-(void)delayMethod{
}
4、取消计定时器
//取消延时器
[_timer invalidate];
在项目开发中,如果是UITextFiled弹出DataPicker,那就很好处理ToolBar,直接将ToolBar绑定在UITextFiled,但是,项目需求是在UITableView中的某个静态Item中弹出,这个时候将ToolBar绑定到UITextFiled就没有什么作用了,这个时候只能将UITextFiled和ToolBar同时绑定在主View,而且还要对ToolBar的按钮做另外处理,这里个人亲测,找到这个不错的方法,而且用到现在没有什么问题
这里需要注意的是,该方案适配的是UITabBarController一起使用,如效果图所示那样,如果需要适配其他地方,请改变弹出的位置即可,由于项目中同时用到两个时间选择,那么可以用个type区别一下,具体看代码
先看下效果图
1、定义控件和变量
//屏幕宽高,后面会用到
#define mScreenHeight ([UIScreen mainScreen].bounds.size.height)
#define mScreenWidth ([UIScreen mainScreen].bounds.size.width)
//控件
@property (strong,nonatomic)UIDatePicker *dataPicker;
@property (strong,nonatomic)UIToolbar *toolbar;
//当前日期操作栏是否在显示
@property (assign,nonatomic)BOOL isShow;
//用于区别各种操作:开始时间(0) 结束时间(1) 无操作(-1)
@property (assign,nonatomic)int type;
2、初始化控件
这里将UIDataPicker和ToolBar都放在屏幕的底部,也就是刚好超过屏幕的底部边缘,手机看不到的地方
-(void)initDatePicker{
if(nil == _dataPicker){
//日期操作栏
_dataPicker = [[UIDatePicker alloc]init];
_dataPicker.frame = CGRectMake(0, mScreenHeight, mScreenWidth, 260);
_dataPicker.contentMode = UIDatePickerModeDate;
_dataPicker.minimumDate = [NSDate date];
_dataPicker.backgroundColor = [UIColor lightGrayColor];
_dataPicker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
//操作条
_toolbar = [[UIToolbar alloc] init];
_toolbar.frame = CGRectMake(0, mScreenHeight, mScreenWidth, 44);
_toolbar.backgroundColor = [UIColor lightTextColor];
UIBarButtonItem *cancel = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(closeTimeWithNoResult)];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *sure = [[UIBarButtonItem alloc] initWithTitle:@"确定" style:UIBarButtonItemStylePlain target:self action:@selector(toggleTimeWithResult)];
_toolbar.items = @[cancel, flexSpace, sure];
[self.view addSubview:_toolbar];
[self.view addSubview:_dataPicker];
}
}
3、开始时间和结束时间的点击事件
case 2:
_type = 0;
[self toggleTimeWithResult];
break;
case 3:
_type = 1;
[self toggleTimeWithResult];
break;
4、取消按钮的点击事件
#pragma 关闭日期操作栏
-(void)closeTimeWithNoResult{
_type = -1;
[self toggleTimeWithResult];
}
5、开启日期操作栏方法
现在所有的焦点都到了toggleTimeWithResult这个方法中了,它是开启日期操作栏的中间枢纽,直接通过计算高度,通过动画,从底部边缘弹出到我们需要的位置即可,关闭则返回到我们的屏幕底部去
#pragma 打开日期操作栏
-(void)toggleTimeWithResult{
if(!_isShow){
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.6];
self.dataPicker.frame = CGRectMake(0, mScreenHeight - 260 -64 -49, mScreenWidth, 260);
self.toolbar.frame = CGRectMake(0, mScreenHeight-260-64-49-44, mScreenWidth, 44);
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationFinished)];
[UIView commitAnimations];
}else{
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.6];
self.dataPicker.frame = CGRectMake(0, mScreenHeight, mScreenWidth, 260);
self.toolbar.frame = CGRectMake(0, mScreenHeight, mScreenWidth, 44);
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationFinished)];
[UIView commitAnimations];
}
}
6、动画结束处理
#pragma 时间操作栏消失回调
-(void)animationFinished{
//改变状态
_isShow = !_isShow;
//如果已经关闭了,就应该处理了,除非type=-1
if(!_isShow){
//获取DataPicker值,并赋值
NSDate *date = self.dataPicker.date;
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
if(_type == 0){
_text_startTime = [formatter stringFromDate:date];
_startTime.detailTextLabel.text = _text_startTime;
}else if(_type == 1){
_text_endTime = [formatter stringFromDate:date];
_endtime.detailTextLabel.text = _text_endTime;
}
}
}
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:@"tel://0753-18814383235" ]];
系统发短信有两种方法,一种不可以自定义消息内容的,一种可以自定义消息内容的,这里介绍可以自定义消息内容的
1、导入库
#import <MessageUI/MessageUI.h>
2、声明代理
@interface TC_SendPassword2 ()<MFMessageComposeViewControllerDelegate>
3、实现代理方法
#pragma 发送短信的回调
-(void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{
[self dismissViewControllerAnimated:YES completion:nil];
switch (result) {
case MessageComposeResultSent:
//信息传送成功
break;
case MessageComposeResultFailed:
//信息传送失败
break;
case MessageComposeResultCancelled:
//信息被用户取消传送
break;
default:
break;
}
}
4、提供发送短信的方法
#pragma mark - 发送短信方法
-(void)showMessageView:(NSArray *)phones title:(NSString *)title body:(NSString *)body
{
if( [MFMessageComposeViewController canSendText] )
{
MFMessageComposeViewController * controller = [[MFMessageComposeViewController alloc] init];
controller.recipients = phones;
controller.navigationBar.tintColor = [UIColor redColor];
controller.body = body;
controller.messageComposeDelegate = self;
[self presentViewController:controller animated:YES completion:nil];
//修改短信界面标题
[[[[controller viewControllers] lastObject] navigationItem] setTitle:title];
}
else
{
//弹窗
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示信息" message:@"该设备不支持短信功能" preferredStyle: UIAlertControllerStyleAlert];
UIAlertAction *sure = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
[alert addAction:sure];
[self presentViewController:alert animated:YES completion:nil];
}
}
5、发送短信
[self showMessageView:[NSArray arrayWithObjects:@"11位手机号码", nil] title:@"你好" body:@"你们好啊"];
1、导入库
#import <Contacts/Contacts.h>
#import <ContactsUI/ContactsUI.h>
2、声明代理
@interface TC_SendPassword2 ()<CNContactPickerDelegate>
3、开启通讯录
CNContactPickerViewController * con = [[CNContactPickerViewController alloc]init];
con.delegate = self;
[self presentViewController:con animated:YES completion:nil];
4、选择通讯录后的回调
这里有通讯录中存在2个电话或者3个电话情况,存在这种情况的时候,我们通过弹窗,将其显示出来,供用户选择
#pragma 选择联系人回调
- (void)contactPicker:(CNContactPickerViewController *)picker didSelectContact:(CNContact *)contact{
if(contact.phoneNumbers.count >1){
//用户拥有两个号码以上
//延时弹窗,这里必须延时,否则会报错
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self alertSelectPhoneNumber:contact];
});
}else if(contact.phoneNumbers.count <= 0){
//处理该用户没有存储电话号码的情况
}else{
//用户只有一个手机号码
_phoneNumber = contact.phoneNumbers[0].value; // 电话号码
}
}
5、两个号码或者三个号码的处理
#pragma 选择用户电话号码
-(void)alertSelectPhoneNumber:(CNContact *)contact{
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提醒" message:@"选择其中一个手机号" preferredStyle: UIAlertControllerStyleAlert];
for (int i=0; i<contact.phoneNumbers.count; i++) {
NSMutableString *message = [NSMutableString stringWithFormat:@"%@:%@",contact.phoneNumbers[i].label,contact.phoneNumbers[i].value.stringValue ];
//changeStr是替代字符串的方法,常用的几个中文替代一下
[self changeStr:message :@"_$!<" :@""];
[self changeStr:message :@">!$_" :@""];
//可以处理下英文,让用户更知道是什么意思
//[self changeStr:message :@"Home" :@"住宅"];
//[self changeStr:message :@"Work" :@"工作"];
//[self changeStr:message :@"Mobile" :@"手机"];
UIAlertAction *sure1 = [UIAlertAction actionWithTitle:message style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//获取我们需要的电话号码
_phoneNumber = contact.phoneNumbers[i].value;
}];
[alert addAction:sure1];
}
UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDestructive handler:nil];
[alert addAction:cancel];
[self presentViewController:alert animated:YES completion:nil];
}
#pragma 替换字符串
-(NSMutableString *)changeStr:(NSMutableString *)mstr :(NSString *)search :(NSString *)replace{
NSRange str = [mstr rangeOfString:search];
while (str.location != NSNotFound) {
[mstr replaceCharactersInRange:str withString:replace];
str = [mstr rangeOfString:search];
}
return mstr;
}
6、效果展示
UITableViewController自带了一个下拉刷新库,用起来十分简单
1、初始化
//下拉刷新
self.refreshControl = [[UIRefreshControl alloc]init];
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];
//当调用ViewWillAppear时,取消当前选中条目的状态
self.clearsSelectionOnViewWillAppear = YES;
[self.refreshControl addTarget:self action:@selector(change) forControlEvents:UIControlEventValueChanged];
2、下拉刷新处理事件
#pragma 下拉刷新
-(void)change{
self.refreshControl.attributedTitle =[[NSAttributedString alloc]initWithString:@"正在刷新中"];
//下面是你们的处理事件逻辑
}
3、当下拉刷新结束时,取消下拉刷新
//取消下拉刷新
if([self.refreshControl isRefreshing]){
[self.refreshControl endRefreshing];
//改回文字
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];
}
4、效果图