项目介绍：

日期选择器，支持年、年月、年月日、时分、年月周 时分等。

由于使用UIPickerView的话，列表会有个弧度，所以这里用了https://github.com/xiaozhuxiong121/PGPickerView

GitHub地址

https://github.com/xiaozhuxiong121/PGDatePicker

CocoaPods安装

pod 'PGDatePicker'

使用

PGDatePicker *datePicker = [[PGDatePicker alloc]init];
datePicker.delegate = self;
[datePicker show];
datePicker.datePickerMode = PGDatePickerModeYear;
 
#pragma PGDatePickerDelegate
- (void)datePicker:(PGDatePicker *)datePicker didSelectDate:(NSDateComponents *)dateComponents {
    NSLog(@"dateComponents = %@", dateComponents);
}

设置Date

建议用NSDate+PGCategory类所定义的方法去设置

+ (NSDate *)setYear:(NSUInteger)year;
+ (NSDate *)setYear:(NSUInteger)year month:(NSUInteger)month;
+ (NSDate *)setYear:(NSInteger)year month:(NSInteger)month day:(NSInteger)day;
+ (NSDate *)setMonth:(NSUInteger)month day:(NSUInteger)day hour:(NSInteger)hour minute:(NSInteger)minute;
+ (NSDate *)setHour:(NSInteger)hour minute:(NSInteger)minute;

比如：datePicker.maximumDate = [NSDate setYear:2017];