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iOS-UITextView-文本输入视图的使用
#import "ViewController.h"
@interface ViewController ()<UITextViewDelegate>
{
UIView *bgView;
UITextView *inputView;
CGRect keyBoardRect;
NSMutableArray *allContent;
}
@end
/*
1.NSDate 时间格式
2.NSTimeInterval 时间间隔 基本单位 秒
3.NSDateFormatter 时间格式器用于日期对象的格式化或者字符串解析日期为对象
时间戳:
日期格式例如以下:
y 年
M 年中的月份
D 当天是今年的第多少天
d 月份中的天数
F 月份中的周数
E 星期几
a Am/pm
H 一天中的小时数(0-23)
k 一天中的小时数(1-24)
K am/pm 中的小时数(0-11) Number 0
h am/pm 中的小时数(1-12) Number 12
m 小时中的分钟数 Number 30
s 分钟中的秒数 Number 55
S 毫秒数 Number 978
z 时区 General time zone Pacific Standard Time; PST; GMT-08:00
Z 时区 RFC 822 time zone -0800
4.比較时间:
(1)比較两个日期是不是同一个日期 isEqualToDate
(2)获取较早的日期 earlierDate
(3)获取较晚的时间 lateDate
(4)获取两个日期间隔多少秒
*/
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
allContent = [NSMutableArray array];
//通过通知检測键盘显示的状态
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoard:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter ] addObserver:self selector:@selector(keyBoard:) name:UIKeyboardWillHideNotification object:nil];
//须要输入框和其上面的button同一时候上移
bgView = [[UIView alloc]initWithFrame:CGRectMake(0, CGRectGetHeight(self.view.frame)-40, CGRectGetWidth(self.view.frame), 40)];
bgView.backgroundColor = [UIColor grayColor];
[self.view addSubview:bgView];
inputView = [[UITextView alloc]initWithFrame:CGRectMake(50, 5, 200, 30)];
inputView.layer.cornerRadius = 5;
inputView.delegate = self;
[bgView addSubview:inputView];
UIButton *sendBt = [UIButton buttonWithType:UIButtonTypeCustom];
sendBt.frame = CGRectMake(CGRectGetMaxX(inputView.frame)+20, 5, 80, 30);
[bgView addSubview:sendBt];
sendBt.backgroundColor = [UIColor cyanColor];
[sendBt setTitle:@"发送" forState:UIControlStateNormal ];
[sendBt setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
sendBt.tag = 100;
sendBt.layer.cornerRadius = 5;
//默认不能够使用button,输入内容后才使用
sendBt.enabled = YES;
[sendBt addTarget:self action:@selector(senContent:) forControlEvents:UIControlEventTouchUpInside];
}
#pragma ------------键盘的状态--------------
- (void)keyBoard:(NSNotification *)not
{
NSDictionary *info = not.userInfo;
// NSLog(@"%@",info);
keyBoardRect = [info[UIKeyboardFrameEndUserInfoKey]CGRectValue];
bgView.frame = CGRectMake(0, CGRectGetMinY(keyBoardRect)-40, CGRectGetWidth(self.view.frame), 40);
}
#pragma ------------TextViewDelegate方法--------------
- (void)textViewDidBeginEditing:(UITextView *)textView
{
//開始编辑的时候同意发送button使用
UIButton *button = (UIButton *)[bgView viewWithTag:100];
button.enabled = YES;
}
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
//通过检測textView输入的内容得到它的内容高度,把内容的高度设置成inputView的高度以及bgView的高度
bgView.frame = CGRectMake(0, CGRectGetHeight([UIScreen mainScreen].bounds)-textView.contentSize.height-10-CGRectGetHeight(keyBoardRect), CGRectGetWidth([UIScreen mainScreen].bounds), textView.contentSize.height+10);
inputView.frame = CGRectMake(50, 5, 200, textView.contentSize.height);
return YES;
}
#pragma ------------发送输入的内容--------------
- (void)senContent:(UIButton *)sender
{
[inputView resignFirstResponder];
NSLog(@"%@",inputView.text);
inputView.text = @"";
NSDate *curDate = [NSDate date];
NSLog(@"%@",[NSString stringWithFormat:@"%@",curDate]);
//时 分 秒
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
//设置时间格式
formatter.dateFormat = @"y/M/d E a hh: mm :ss";
//把curDate依照时间格式转化成字符串
NSString *time = [formatter stringFromDate:curDate];
//NSDateFormatter 转换的时间 是设备的时间
NSLog(@"%@",time);
//获得从1970年到如今的时间间隔(一般是时间戳的时间间隔)
NSTimeInterval timeInterval = [curDate timeIntervalSince1970];
NSString *timeString = [NSString stringWithFormat:@"%0.f",timeInterval];
NSLog(@"时间戳:%@",timeString);
//把时间戳转换成 日期
NSDate *date = [NSDate dateWithTimeIntervalSince1970:[timeString doubleValue]];
NSLog(@"时间戳 转时间%@",[formatter stringFromDate:date]);
//获得较早的日期
//NSDate *earDate = [date earlierDate:date];
//通过时间间隔能够计算未来+ 或者过去的时间-
//NSDate dateWithTimeIntervalSinceNow: 计算当前日期到时间间隔日期
//获得一天的时间间隔
NSTimeInterval interval = 24*60*60;
//设置时间格式为年 月日
NSDate *ysterday = [NSDate dateWithTimeIntervalSinceNow:-interval];
formatter.dateFormat = @"yyyy-MM-dd";
NSLog(@"%@",[formatter stringFromDate:ysterday]);
NSDictionary *info = @{@"content":inputView.text,@"time":time};
[allContent addObject:info];
//指定依据那个key 进行分类
NSSortDescriptor *soreDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"time" ascending:NO];
NSMutableArray *soreDescriptorArry = [NSMutableArray arrayWithObjects:&soreDescriptor count:1];
//依据描写叙述的数组进行排序
allContent = [[allContent sortedArrayUsingDescriptors:soreDescriptorArry] mutableCopy];
sender.enabled = NO;
NSLog(@"%@",allContent);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
iOS-UITextView-文本输入视图的使用