GLCalendarView是Glow的第二個開源專案，雖然開源的calendar有很多，但是支援range的卻很少，我們對GLCalendarView的定位是date range picker，希望它可以幫助到其他開發者～

Demo

Installation

CocoaPods

如果你使用cocoapods，那麼只需將GLCalendarView加入PodFile

pod "GLCalendarView", "~> 1.0.0"  

Source File

或者可以將 Sources 目錄下的所有檔案拷貝進專案

Usage

• 在storyboard裡放置一個view，或者用程式碼建立，將view的class設定成GLCalendarView
• 在viewDidLoad裡, 對calendar view進行一些設定，例如設定 firstDate 和 lastDate
• 在 viewWillAppear裡, 設定需要顯示的ranges，呼叫 [calendarView reload]; 來重新整理資料

如果要在calendar view裡顯示一些range，需要構造一些GLCalendarDateRange objects，把它們設定成calendar view的model：

NSDate *today = [NSDate date];  
NSDate *beginDate = [GLDateUtils dateByAddingDays:-23 toDate:today];  
NSDate *endDate = [GLDateUtils dateByAddingDays:-18 toDate:today];  
GLCalendarDateRange *range = [GLCalendarDateRange rangeWithBeginDate:beginDate endDate:endDate];  
range.backgroundColor = COLOR_BLUE;  
range.editable = YES;  
range.binding = yourModelObject // you can bind your model to the range

self.calendarView.ranges = [@[range1] mutableCopy];  
[self.calendarView reload];
 

這裡說明一下binding field，它的作用是允許把自己的model繫結到range上，這樣當range被update的時候，可以很方便地從range上拿到對應的model，然後更新這個model。

calendar view會處理所有的使用者互動，包括新增，修改，和刪除一個range，所有的這些事件都可以通過delegate protocol來監聽：

@protocol GLCalendarViewDelegate <NSObject>
- (BOOL)calenderView:(GLCalendarView *)calendarView canAddRangeWithBeginDate:(NSDate *)beginDate;
- (GLCalendarDateRange *)calenderView:(GLCalendarView *)calendarView rangeToAddWithBeginDate:(NSDate *)beginDate;
- (void)calenderView:(GLCalendarView *)calendarView beginToEditRange:(GLCalendarDateRange *)range;
- (void)calenderView:(GLCalendarView *)calendarView finishEditRange:(GLCalendarDateRange *)range continueEditing:(BOOL)continueEditing;
- (BOOL)calenderView:(GLCalendarView *)calendarView canUpdateRange:(GLCalendarDateRange *)range toBeginDate:(NSDate *)beginDate endDate:(NSDate *)endDate;
- (void)calenderView:(GLCalendarView *)calendarView didUpdateRange:(GLCalendarDateRange *)range toBeginDate:(NSDate *)beginDate endDate:(NSDate *)endDate;
@end
 

可以這樣實現：

- (BOOL)calenderView:(GLCalendarView *)calendarView canAddRangeWithBeginDate:(NSDate *)beginDate
{
    // you should check whether user can add a range with the given begin date
    return YES;
}

- (GLCalendarDateRange *)calenderView:(GLCalendarView *)calendarView rangeToAddWithBeginDate:(NSDate *)beginDate
{
    // construct a new range object and return it
    NSDate* endDate = [GLDateUtils dateByAddingDays:2 toDate:beginDate];
    GLCalendarDateRange *range = [GLCalendarDateRange rangeWithBeginDate:beginDate endDate:endDate];
    range.backgroundColor = [UIColor redColor];
    range.editable = YES;
    range.binding = yourModel // bind your model to the range instance
    return range;
}

- (void)calenderView:(GLCalendarView *)calendarView beginToEditRange:(GLCalendarDateRange *)range
{
    // save the range to a instance variable so that you can make some operation on it
    self.rangeUnderEdit = range;
}

- (void)calenderView:(GLCalendarView *)calendarView finishEditRange:(GLCalendarDateRange *)range continueEditing:(BOOL)continueEditing
{
    // retrieve the model from the range, do some updates to your model
    id yourModel = range.binding;
    self.rangeUnderEdit = nil;
}

- (BOOL)calenderView:(GLCalendarView *)calendarView canUpdateRange:(GLCalendarDateRange *)range toBeginDate:(NSDate *)beginDate endDate:(NSDate *)endDate
{
    // you should check whether the beginDate or the endDate is valid
    return YES;
}

- (void)calenderView:(GLCalendarView *)calendarView didUpdateRange:(GLCalendarDateRange *)range toBeginDate:(NSDate *)beginDate endDate:(NSDate *)endDate
{
    // update your model if necessary
    id yourModel = range.binding;
}

Appearance

GLCalendarView 的 appearance是高度可定製的，可以通過appearance api來設定所有的字型，顏色，邊框等:

[GLCalendarView appearance].rowHeight = 54;
[GLCalendarView appearance].padding = 6;
[GLCalendarView appearance].weekDayTitleAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:8], NSForegroundColorAttributeName:[UIColor grayColor]};
[GLCalendarView appearance].monthCoverAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:30]};

[GLCalendarDayCell appearance].dayLabelAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:20], NSForegroundColorAttributeName:UIColorFromRGB(0x555555)};
[GLCalendarDayCell appearance].monthLabelAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:8]};

[GLCalendarDayCell appearance].editCoverBorderWidth = 2;
[GLCalendarDayCell appearance].editCoverBorderColor = UIColorFromRGB(0x366aac);
[GLCalendarDayCell appearance].editCoverPointSize = 14;

[GLCalendarDayCell appearance].todayBackgroundColor = UIColorFromRGB(0x366aac);
[GLCalendarDayCell appearance].todayLabelAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:20]};

[GLCalendarDayCell appearance].rangeDisplayMode = RANGE_DISPLAY_MODE_CONTINUOUS;