iOS 定制日历

来源：互联网发布：淘宝店铺如何激活编辑：程序博客网时间：2024/06/06 09:15

1.开发过程

2.感言

由于app的需要,我们需要在app上放上一个定制的日历,开始以为很好解决,在网上看了许多demo,都不理想,为此焦头烂额了几天(一直在研究),最后终于决定自己写一个,压力好大啊.下面我来说一下我坐日历的思路(算是取巧);

xcode为我们提供了三个方法,我们可以通过此方法来获取当前的月份的长度,还可以获取当前月的第一天是星期几,日历的话我们必须确定具体的星期(系统时间的话打印出来的会和实际的差8个小时,后面我会粘出来)

获取了系统的时间之后,根据系统自带的api获取本月天数和每月第一天的星期数,本月日历表建好,下个月的话,我会去处理本地时间,里面的月份+1,这样就可以获取下个月的日历了(本人测试可行),依次类推,就完成了一个无限的日历表了.下面上代码;

@interface LooKForProjectViewController ()
{
    NSCalendar *myCalendar;
    NSRange monthRange;
    int     currentDayIndexOfMonth;
    int     firstDayIndexOfWeek;
    UIScrollView * scroll;
    int      monthCount;//月份;
    UILabel * year_label;//显示年份;
    UIView * date_view;//日历背景图;
    NSString * myNewDate_str;//取处理完成之后的时间字符串;

}
@end

@implementation LooKForProjectViewController

- (void)viewDidLoad {
    [super viewDidLoad];

     scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
    scroll.contentSize = CGSizeMake([UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height + 5);
    scroll.backgroundColor = MY_GROUND_COLOR;
    scroll.showsVerticalScrollIndicator = NO;
    [self.view addSubview:scroll];
    year_label = [[UILabel alloc]initWithFrame:CGRectMake(([[UIScreen mainScreen]bounds].size.width - 100)/2, 10, 100, 20)];
    [scroll addSubview:year_label];


    //下个月
    UIButton * next_month_button = [UIButton buttonWithType:UIButtonTypeSystem];
    next_month_button.frame = CGRectMake(220 , 10, 50, 20);
    [next_month_button setTitle:@"下个月" forState:UIControlStateNormal];
    [next_month_button addTarget:self action:@selector(showTheNextMonth:) forControlEvents:UIControlEventTouchUpInside];
    [scroll addSubview:next_month_button];

    //初始化日历;设置为公历;
    myCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    //设置每周的第一天从星期几开始(1是周日,2是周一)
    [myCalendar setFirstWeekday:1];
    //设置每个月或者每年的第一周必须包含的最少天数设置为1 就是第一周至少要有一天
    [myCalendar setMinimumDaysInFirstWeek:1];
    //设置时区，不设置时区获取月的第一天和星期的第一天的时候可能会提前一天。
    [myCalendar setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
    [self checkTheMonthNumber:3];//默认进入的是当前月份;


    for (int i = 0 ; i < 7; i++) {
        UILabel * week_label = [[UILabel alloc]init];
        week_label.backgroundColor = [UIColor yellowColor];
        week_label.frame = CGRectMake(15 + 40 *(i%7), 40, 30, 15);
        if (i == 0 ) {
            week_label.text = @"日";
        }else if (i == 1){
            week_label.text = @"一";
        }else if (i == 2){
            week_label.text = @"二";
        }else if (i == 3){
            week_label.text = @"三";
        }else if (i == 4){
            week_label.text = @"四";
        }else if (i == 5){
            week_label.text = @"五";
        }else if (i == 6){
            week_label.text = @"六";
        }[scroll addSubview:week_label];

    }
}
//转化时区;
- (NSDate *)changeDate:(int)monthCount2

{

    NSDateFormatter * df = [[NSDateFormatter alloc]init];
    [df setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString * s1 = [df stringFromDate:[NSDate date]];
    int now_year = [[s1 substringWithRange:NSMakeRange(2, 2)] intValue];
    NSString * year_str = [s1 stringByReplacingCharactersInRange:NSMakeRange(2, 2) withString:[NSString stringWithFormat:@"%d", (monthCount2 - 1)/12+ now_year]];
     //处理一下月份信息;
    //加一个判断,查看是否过了12月份;
    if (monthCount2 > 12) {
        monthCount2 = monthCount2%12;
        if (monthCount2 == 0) {
            monthCount2 = 12;

        }

    }
    NSString * next_year_str;
    next_year_str = [year_str stringByReplacingCharactersInRange:NSMakeRange(6, 1) withString:[NSString stringWithFormat:@"%d",monthCount2]];
    myNewDate_str = next_year_str;
    //处理点击之后月份转变的字符串;

    NSDate * my_date = [df dateFromString:next_year_str];

    NSTimeZone *zone = [NSTimeZone systemTimeZone];

    NSInteger interval = [zone secondsFromGMTForDate: my_date];

    NSDate *localeDate = [my_date dateByAddingTimeInterval: interval];

    NSLog(@"%@", localeDate);
    return localeDate;


}
- (void)checkTheMonthNumber:(int)month2
{
    //默认进入的当前时间的;
    NSDate * beijing_date = [self changeDate:month2];
    //显示年份
    //取出处理后的年份和月份;
    NSString * the_year_str = [myNewDate_str substringWithRange:NSMakeRange(0, 4)];
    NSString * the_month_str = [myNewDate_str substringWithRange:NSMakeRange(6, [myNewDate_str length] - 18)];
    year_label.text = [NSString stringWithFormat:@"%@年%@月",the_year_str,the_month_str];
    NSLog(@"%@",year_label.text);
    [self calenderSetDate:beijing_date];

}
- (void)calenderSetDate:(NSDate *)date
{
    monthRange = [myCalendar rangeOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:date];
    NSLog(@"%lu,%lulu",(unsigned long)monthRange.location,(unsigned long)monthRange.length);
    //获取date在其所在的月份的位置
    currentDayIndexOfMonth = [myCalendar ordinalityOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:date];
    NSLog(@"当前天数%d",currentDayIndexOfMonth);

    NSTimeInterval interval;
    NSDate * firstDayMonth;
    //如果firstDayOfMonth和interval可计算，下边这个方法会返回YES，并且由firstDayOfMonth可得到date所在的设置的时间段（NSMonthCalendarUnit）里的第一天
    if ([myCalendar rangeOfUnit:NSMonthCalendarUnit startDate:&firstDayMonth interval:&interval forDate:date]) {
        NSLog(@"%@",firstDayMonth);
        NSLog(@"%f",interval);
    }
    firstDayIndexOfWeek = [myCalendar ordinalityOfUnit:NSDayCalendarUnit inUnit:NSWeekCalendarUnit forDate:firstDayMonth];
    [self drawBtn];


}
- (void)drawBtn
{
    date_view = [[UIView alloc]initWithFrame:CGRectMake(0, 80, [[UIScreen mainScreen]bounds].size.width, 300)];
    date_view.backgroundColor = [UIColor yellowColor];
    [scroll addSubview:date_view];
    NSArray * date_array = [self getTheMessageOfDays];
    for (int j = 0; j < [date_array count]; j ++) {
        NSNumber * date_number = [date_array objectAtIndex:j];
        for (int i = firstDayIndexOfWeek - 1; i < monthRange.length + firstDayIndexOfWeek - 1; i++) {
            UIButton * item_btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
            item_btn.frame = CGRectMake(5 + 40 * (i%7), 70 + 40 * (i/7), 30, 20);
            item_btn.tag = i + 2 - firstDayIndexOfWeek;

            [item_btn setTitle:[NSString stringWithFormat:@"%d",i + 2 - firstDayIndexOfWeek] forState:UIControlStateNormal];
            [item_btn addTarget:self action:@selector(choseTheButton:) forControlEvents:UIControlEventTouchUpInside];


            [date_view addSubview:item_btn];

            if ([date_number intValue] == i + 2 - firstDayIndexOfWeek) {
                item_btn.backgroundColor = [UIColor cyanColor];


            }else{
                NSLog(@"+++");
            }







    }





}




}
- (void)choseTheButton:(UIButton *)btn
{
    NSLog(@"%d",btn.tag);
    NSArray * date_array = [self getTheMessageOfDays];
    for ( int i = 0; i < [date_array count]; i++) {
        NSNumber * date_number = [date_array objectAtIndex:i];
        if (btn.tag == [date_number intValue]) {
            NSLog(@"%d",btn.tag);
            UILabel * show_label = [[UILabel alloc]initWithFrame:CGRectMake(0, 400, [[UIScreen mainScreen]bounds].size.width, 30)];
            show_label.text = @"本期回款1000万";
            NSLog(@"frame%@",NSStringFromCGRect(show_label.frame));
            show_label.backgroundColor = [UIColor redColor];
            [scroll addSubview:show_label];

        }




}
//    UILabel * show_label = [[UILabel alloc]initWithFrame:CGRectMake(0, [[UIScreen mainScreen]bounds].size.height - 40, [[UIScreen mainScreen]bounds].size.width, 30)];
//    show_label.text = @"本期回款1000万";
//    NSLog(@"frame%@",NSStringFromCGRect(show_label.frame));
//    show_label.backgroundColor = [UIColor redColor];
//    [scroll addSubview:show_label];
}
//查看下个月选项;
- (void)showTheNextMonth:(UIButton *)btn
{
    //添加一个计数器;
    monthCount++;
    [date_view removeFromSuperview];
    [self checkTheMonthNumber:3 + monthCount];

}
//请求的数据源;
- (NSArray *)getTheMessageOfDays
{
    NSArray * back_day = @[@1,@3,@5,@26];
    return back_day;
}

这里面是我添加的假数据,可以通过日历自定义事件.大家又不清楚的可以找我;

虽然完成了要求,但我知道这不是最完善的代码,取巧成分很大,开发时间略短,无法增加时间,先写到这里,希望对大家会有帮助

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