三行代码实现`年月日`的弹出控件

时间  2019-11-07
标签 三行 代码 实现 月日 弹出 控件 繁體版
原文   原文链接

MXPickerView

MXPickerView 是一个 对 UIPickerView 和 UIDatePicker的封装, 三行代码实现年月日的弹出控件数组

ScreenShot

MXPickerViewModeCustom MXPickerViewModeDD MXPickerViewModeDD_DD MXPickerViewModeMM
MXPickerViewModeMM_MM MXPickerViewModeMM_DD MXPickerViewModeMMDD_MMDD MXPickerViewModeYYYY
MXPickerViewModeYYYY_YYYY MXPickerViewModeYYYY_MM MXPickerViewModeYYYYMM_YYYYMM MXPickerViewModeYYYYMMDD_YYYYMMDD
MXPickerViewModeTime MXPickerViewModeDate MXPickerViewModeDateAndTime MXPickerViewModeCountDownTimer

Attributes

ScreenshotsInDemo Attribute Name Example
NSDictionary<NSAttributedStringKey, id> *barBtnItemTitleTextAttributes; pickerView.barBtnItemTitleTextAttributes = @{NSFontAttributeName: [UIFont boldSystemFontOfSize:14], NSForegroundColorAttributeName: [UIColor redColor]}
NSString *yearLocale, *monthLocale, *dayLocale; pickerView.yearLocale = @"年";
pickerView.monthLocale = @"月";
pickerView.dayLocale = @"号";

BOOL toolBarPositionBottom;

//默认为NO,返回和肯定按钮显示在顶部，
当设为YES,返回和肯定按钮显示在底部

pickerView.toolBarPositionBottom = YES;

NSArray<NSString *> *topTipBarTitles;

//不为nil时, toolBarPositionBottom
会自动设置为YES，底部显示返回和肯定按钮，
顶部显示topTipBarTitles, 如开始日期 - 结束日期

pickerView.topTipBarTitles = @[@"开始日期", @"结束日期"];

CGFloat topTipBarH, toolBarH;

pickerView.topTipBarH = 50;
pickerView.toolBarH = 30;
// 底部显示返回和肯定按钮，顶部显示开始日期 - 结束日期
topTipBarTitles一栏高度，默认是44;
返回和肯定按钮一栏高度，默认是44

pickerView.topTipBarTitles = @[@"开始日期", @"结束日期"];

BOOL showsDescending;

// 默认升序,结果为12, 1, 2, 3... 11, 12，
当为降序，结果为12, 11, 10, ...4, 3, 2, 1, 12, 仅支持mode是日期类的，如MXPickerViewModeDD...

pickerView.showsDescending = YES;

id selectedTitleOrCustomModels;

//若是值不为空，则pickerView会把当前值选中，
demo中是把上一个值记录为selectedTitleOrCustomModels，
当模式为MXPickerViewModeCustom, selectedTitleOrCustomModels 应该为customModels, 是一个 NSArray数组类型, 如 @[@"0-1", @"1-2", @"2-3"]
当模式为日期一类的，如MXPickerViewModeDD..., selectedTitleOrCustomModels应该为selectedTitle, 是一个用空格拼接的NSString数组类型, 格式相似于2018 12 12
当模式为UIDatePicker一类的, 如MXPickerViewModeDateAndTime, selectedTitleOrCustomModels 不该该传, 默认值老是nil!

//当模式为MXPickerViewModeCustom
pickerView.selectedTitleOrCustomModels = @[@"0-1", @"1-2", @"2-3"];

//当模式为日期一类的，如MXPickerViewModeDD...,
pickerView.selectedTitleOrCustomModels = @"12月 1号"
NSDate *minimumDate;
NSDate *maximumDate;
//仅支持mode是日期类的，如MXPickerViewModeDD...


//建立从（今天 - 今天 + 10天），如（1号 - 10号）的列表

//方式1，设置中间的时间间隔，超过当月的最大天数,
代码内部会取余deltaBetweenMaxAndMin%最大天数，
推荐方式一
pickerView.minimumDate = [NSDate date];
pickerView.deltaBetweenMaxAndMin = 10;

//方式二, 设置最小日期和最大日期，超过
当月的最大天数,代码内部会取余
deltaBetweenMaxAndMin%最大天数
pickerView.minimumDate = [NSDate date];
pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 24 * 60 * 60 sinceDate:pickerView.minimumDate];


CGFloat componentWidth;
//设置每一个component的宽度，等宽，若是不设置，
默认为pickerView.bounds.size.width/numberOfComponents

pickerView.componentWidth = 100;
//每一列component列宽都为100

CGFloat componentRowHeight;
//设置每一个component的行高，若是不设置，默认为40

pickerView.componentRowHeight = 100;

CGFloat (^configPickerViewWidthForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component)
//为每一个component设置不一样的宽度,相同的能够直接设置pickerView.componentWidth = xx

pickerView.configPickerViewWidthForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) { return (component == 0 || component == 3) ? 80 : (mxPickerView.bounds.size.width - 2 * 80)/4;};

CGFloat(^configPickerViewRowHeightForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component)
//为每一个component设置相同的行高, 等价于pickerView.componentRowHeight = xx

pickerView.configPickerViewRowHeightForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) {return 100;};

NSString * (^configPickerViewTitleForRowForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component);
//设置每一行的title

pickerView.configPickerViewTitleForRowForComponentBlock = ^NSString *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component) {return @"row content";};

NSAttributedString * (^configPickerViewAttributedTitleForRowForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component)
//设置每一行的attributedTitle

pickerView.configPickerViewAttributedTitleForRowForComponentBlock = ^NSAttributedString *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component) {return [[NSAttributedString alloc] initWithString:@"attributed title" attributes:@{NSForegroundColorAttributeName:[UIColor purpleColor]}];};

void (^configPickerViewContentLabelAppearanceForRowForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, UILabel *contentLabel, NSInteger row, NSInteger component);
//设置 content label 的样式，如字体，文字对齐方式，背景颜色等...

pickerView.configPickerViewContentLabelAppearanceForRowForComponentBlock = ^(MXPickerView *mxPickerView, UIPickerView *pickerView, UILabel *contentLabel, NSInteger row, NSInteger component){ contentLabel.backgroundColor = [UIColor yellowColor];//黄色 contentLabel.textAlignment = NSTextAlignmentRight;};//右对齐

UIView * (^configPickerViewViewForRowForComponentBlock)(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component, UIView *reusingView);
//自定义在component中的contentView

pickerView.configPickerViewViewForRowForComponentBlock = ^UIView *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component, UIView *reusingView) {return [UIButton buttonWithType:UIButtonTypeContactAdd];//返回UIButtonTypeContactAdd};

How to use

MXPickerViewModeCustom

[MXPickerView showWithSize:CGSizeMake(self.view.bounds.size.width, 200) pickerViewMode:MXPickerViewModeCustom updateBlock:^(MXPickerView *pickerView, MXPickerViewMode pickerViewMode, id uiDatePickerOrUIPickerView) {
        // 设置`contentlLabel`文字
        pickerView.modelsM = (id)@[@[@"0-0", @"0-1", @"0-2", @"0-3"], @[@"1-0", @"1-1", @"1-2", @"1-3"], @[@"2-0", @"2-1", @"2-2", @"2-3"]];
        //pickerView.selectedTitleOrCustomModels = @[@"0-1", @"1-2", @"2-3"];
        pickerView.selectedTitleOrCustomModels = (NSArray *)self.selectedTitleOrCustomModelsDictM[@(pickerViewMode)];
        pickerView.configPickerViewTitleForRowForComponentBlock = ^NSString *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component) {
            return [NSString stringWithFormat:@"%@", mxPickerView.modelsM[component][row]];
        };
        //pickerView.barBtnItemTitleTextAttributes = @{NSFontAttributeName: [UIFont boldSystemFontOfSize:14], NSForegroundColorAttributeName: [UIColor redColor]};
        pickerView.doneButtonDidClickBlock = ^(MXPickerViewMode pickerViewMode, CGFloat countDownDuration, NSDate *date, id selectedTitleOrCustomModels) {
            NSLog(@"selectedTitleOrCustomModels: %@", selectedTitleOrCustomModels);
            self.selectedTitleOrCustomModelsDictM[@(pickerViewMode)] = (NSArray *)selectedTitleOrCustomModels;
        };
        /*// 设置`contentlLabel`属性字符串，打开注释 pickerView.configPickerViewAttributedTitleForRowForComponentBlock = ^NSAttributedString *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component) { return [[NSAttributedString alloc] initWithString:@"attributed title" attributes:@{NSForegroundColorAttributeName:[UIColor purpleColor]}]; };*/
        /*// 须要为不一样`component`返回不同列高时，打开注释 pickerView.configPickerViewWidthForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) { return (component == 0 || component == 3) ? 70 : (self.view.bounds.size.width - 2 * 80)/4; };*/
        /*// 为每一个`component`设置不一样的行高, 相同的能够直接设置`pickerView.componentRowHeight = xx` pickerView.configPickerViewRowHeightForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) { return 100; };*/
        //pickerView.componentRowHeight = 100; //默认每一列`component`行高都为40,当全部的`component`行高相等时，可统一设置, 至关于`tableView.rowHeight`
        //pickerView.toolBarPositionBottom = YES; //默认为`NO`,`返回`和`肯定`按钮显示在顶部，当设为`YES`,`返回`和`肯定`按钮显示在底部
        //pickerView.topTipBarTitles = @[@"开始日期", @"结束日期"]; //不为`nil`时,`toolBarPositionBottom`会自动设置为`YES`，底部显示`返回`和`肯定`按钮，顶部显示`开始日期 - 结束日期`
        //pickerView.topTipBarH = 50; //`topTipBarTitles`一栏高度，默认是44
        //pickerView.toolBarH = 30; //`返回`和`肯定`按钮一栏高度，默认是44
        //pickerView.backgroundColor = [UIColor lightGrayColor];
        /*//自定义在`component`中的`contentView` pickerView.configPickerViewViewForRowForComponentBlock = ^UIView *(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger row, NSInteger component, UIView *reusingView) { return [UIButton buttonWithType:UIButtonTypeContactAdd]; };*/
        // 想设置`contentLabel`的各个属性，实现`appearance block`
        pickerView.configPickerViewContentLabelAppearanceForRowForComponentBlock = ^(MXPickerView *mxPickerView, UIPickerView *pickerView, UILabel *contentLabel, NSInteger row, NSInteger component) {
            contentLabel.backgroundColor = [UIColor yellowColor];
            contentLabel.textAlignment = NSTextAlignmentRight;
         };
        /*pickerView.datePickerDidChangeBlock = ^(MXPickerViewMode pickerViewMode, CGFloat countDownDuration, NSDate *date, NSString *selectedTitle) { NSLog(@"pickerViewMode\n: %ld, countDownDuration\n: %f, date\n: %@, selectedTitle\n: %@", pickerViewMode, countDownDuration, date, selectedTitle); };*/
    }];
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Other date Mode

MXPickerViewModeDD， MXPickerViewModeDD_DD MXPickerViewModeMM MXPickerViewModeMM_MM MXPickerViewModeMM_DD MXPickerViewModeMMDD_MMDD MXPickerViewModeYYYY MXPickerViewModeYYYY_YYYY MXPickerViewModeYYYY_MM MXPickerViewModeYYYYMM_YYYYMM MXPickerViewModeYYYYMMDD_YYYYMMDDapp

[MXPickerView showWithSize:CGSizeMake(self.view.bounds.size.width, 200) pickerViewMode:mode updateBlock:^(MXPickerView *pickerView, MXPickerViewMode pickerViewMode, id uiDatePickerOrUIPickerView) {
        switch (mode) {
            case MXPickerViewModeDD:
            case MXPickerViewModeDD_DD: {
                //建立从（今天 - 今天 + 10天），如（1号 - 10号）的列表，方式1和方式2结果同样
                //方式1，设置中间的时间间隔，超过当月的`最大天数`,代码内部会取余`deltaBetweenMaxAndMin%最大天数`，推荐方式一，方式二须要算日期，麻烦
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                /* //方式2, 设置`最小日期`和`最大日期`，超过当月的`最大天数`,代码内部会取余`deltaBetweenMaxAndMin%最大天数` pickerView.minimumDate = [NSDate date]; pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 24 * 60 * 60 sinceDate:pickerView.minimumDate]; */
                //方式3，什么都不写，所有使用默认值，1号 - 当月最大天数，`pickerView.deltaBetweenMaxAndMin = 当月最大天数`;//会根据当前模式设置默认值,`MXPickerViewModeDD_DD`会自动算当月最大几号，以及闰年
                //
                break;
            }
            case MXPickerViewModeMM:
            case MXPickerViewModeMM_MM: {
                //建立从（今月 - 今月 + 10月），如（1月 - 10月）的列表，方式1和方式2结果同样，推荐方式一，方式二须要算日期，麻烦
                //方式1，设置`最小日期`和`中间的时间间隔`，超过12,代码内部会取余`deltaBetweenMaxAndMin%12`
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                /* //方式2, 设置`最小日期`和`最大日期`，超过12代码内部会取余`deltaBetweenMaxAndMin%12` pickerView.minimumDate = [NSDate date]; pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 60 * 60 sinceDate:pickerView.minimumDate]; */
                //方式3，什么都不写，所有使用默认值 1月 - 12月，`pickerView.deltaBetweenMaxAndMin = 12`;//会根据当前模式设置默认值,`MXPickerViewModeMM_MM`则为12
                break;
            }
            case MXPickerViewModeMM_DD: // 1月1号
            case MXPickerViewModeMMDD_MMDD: {
                //建立从（今月1号 -（今月 + 10）31号）的列表，如（1月1号 - 10月31号），方式1和方式2结果同样，推荐方式一，方式二须要算日期，麻烦
                //方式1，设置中间的时间间隔，超过12,代码内部会取余`deltaBetweenMaxAndMin%12`
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                ///*
                 //方式2, 设置`最小日期`和`最大日期`，超过12，代码内部会取余`deltaBetweenMaxAndMin%12`
                //pickerView.minimumDate = [NSDate date];
                //pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 30 * 24 * 60 * 60 sinceDate:pickerView.minimumDate];
                 //*/
                //方式3，什么都不写，所有使用默认值，1月1号 - 12月31号，`pickerView.deltaBetweenMaxAndMin = 12`;//会根据当前模式为`MXPickerViewModeDD_DD`设置默认值12，会自动算当月最大几号，以及闰年
                break;
            }
            case MXPickerViewModeYYYY:
            case MXPickerViewModeYYYY_YYYY: {
                //建立从（今年 -（今年 + 10）的列表，如（2018年 - 2028年），方式1和方式2结果同样，推荐方式一，方式二须要算日期，麻烦
                //方式1，设置中间的时间间隔，超过12,代码内部会取余`deltaBetweenMaxAndMin%12`
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                ///*
                //方式2, 设置最大的日期
                //pickerView.minimumDate = [NSDate date];
                //pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 12 * 30 * 24 * 60 * 60 sinceDate:pickerView.minimumDate];
                //*/
                //方式3，什么都不写，所有使用默认值，1918年 - 今年，`pickerView.deltaBetweenMaxAndMin = 100`;//会根据当前模式为`MXPickerViewModeYYYY_YYYY`设置默认值100
                break;
            }
            case MXPickerViewModeYYYY_MM: // 2018年1月
            case MXPickerViewModeYYYYMM_YYYYMM: {
                //建立从（今年1月 -（今年 + 10）12月）的列表，如（2018年1月 - 2028年12月），方式1和方式2结果同样，推荐方式一，方式二须要算日期，麻烦
                //方式1，设置中间的时间间隔，超过12,代码内部会取余`deltaBetweenMaxAndMin%12`
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                ///*
                //方式2, 设置最大的日期
                //pickerView.minimumDate = [NSDate date];
                //pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 12 * 30 * 24 * 60 * 60 sinceDate:pickerView.minimumDate];
                //*/
                //方式3，什么都不写，所有使用默认值，1918年1月 - 今年12月，`pickerView.deltaBetweenMaxAndMin = 100`;//会根据当前模式为`MXPickerViewModeYYYY_YYYY`设置默认值100
                break;
            }
            case MXPickerViewModeYYYYMMDD_YYYYMMDD: {
                //pickerView.componentWidth = 70;//6列须要在block中单独设置每一列的宽度，要否则2018显示20..
                //建立从（今年1月1号 -（今年 + 10）12月31号）的列表，如（2018年1月1号 - 2028年12月31号），方式1和方式2结果同样，推荐方式一，方式二须要算日期，麻烦
                //方式1，设置中间的时间间隔，超过12,代码内部会取余`deltaBetweenMaxAndMin%12`
                pickerView.minimumDate = [NSDate date];
                pickerView.deltaBetweenMaxAndMin = 10;
                ///*
                //方式2, 设置最大的日期
                //pickerView.minimumDate = [NSDate date];
                //pickerView.maximumDate = [NSDate dateWithTimeInterval:10 * 12 * 30 * 24 * 60 * 60 sinceDate:pickerView.minimumDate];
                //*/
                //方式3，什么都不写，所有使用默认值，1918年1月1号 - 今年12月31号，`pickerView.deltaBetweenMaxAndMin = 100`;//会根据当前模式为`MXPickerViewModeYYYY_YYYY`设置默认值100
                break;
            }
            default:
                break;
        }
        //pickerView.showsDescending = YES;//默认升序,结果为12, 1, 2, 3... 11, 12，当为降序，12, 11, 10,...4, 3, 2, 1, 12
        
        //pickerView.componentRowHeight = 100; //默认每一列`component`行高都为40,当全部的`component`行高相等时，可统一设置, 至关于`tableView.rowHeight`
        //须要为不一样`component`返回不同行高时，打开注释
        /*pickerView.configPickerViewRowHeightForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) { return 100; };*/
        
        //pickerView.componentWidth = 100; //默认每一列`component`列宽都为`pickerView.bounds.size.width/numberOfComponents`,当全部的`component`行高相等时，可统一设置
        //须要为不一样`component`返回不同列宽时，打开注释
        if (mode == MXPickerViewModeYYYYMMDD_YYYYMMDD) {
            pickerView.configPickerViewWidthForComponentBlock = ^CGFloat(MXPickerView *mxPickerView, UIPickerView *pickerView, NSInteger component) {
                return (component == 0 || component == 3) ? 60 : (mxPickerView.bounds.size.width - 2 * 60 - 15)/4;
            };
        }

        //pickerView.toolBarPositionBottom = YES; //默认为`NO`,`返回`和`肯定`按钮显示在顶部，当设为`YES`,`返回`和`肯定`按钮显示在底部
        //pickerView.topTipBarTitles = @[@"开始日期", @"结束日期"]; //不为`nil`时,`toolBarPositionBottom`会自动设置为`YES`，底部显示`返回`和`肯定`按钮，顶部显示`开始日期 - 结束日期`
        //pickerView.topTipBarH = 50; //`topTipBarTitles`一栏高度，默认是44
        //pickerView.toolBarH = 30; //`返回`和`肯定`按钮一栏高度，默认是44
        //pickerView.backgroundColor = [UIColor lightGrayColor];
        /* // 想设置`contentLabel`的各个属性，实现`appearance block` pickerView.configPickerViewContentLabelAppearanceForRowForComponentBlock = ^(MXPickerView *mxPickerView, UIPickerView *pickerView, UILabel *contentLabel, NSInteger row, NSInteger component) { contentLabel.backgroundColor = [UIColor yellowColor]; contentLabel.textAlignment = NSTextAlignmentRight; };*/
        pickerView.yearLocale = @"年";
        pickerView.monthLocale = @"月";
        pickerView.dayLocale = @"号";
        pickerView.selectedTitleOrCustomModels = (NSString *)self.selectedTitleOrCustomModelsDictM[@(mode)];;
        pickerView.doneButtonDidClickBlock = ^(MXPickerViewMode pickerViewMode, CGFloat countDownDuration, NSDate *date, id selectedTitleOrCustomModels) {
            NSLog(@"selectedTitleOrCustomModels: %@", selectedTitleOrCustomModels);
            self.selectedTitleOrCustomModelsDictM[@(pickerViewMode)] = (NSString *)selectedTitleOrCustomModels;
        };
    }];
复制代码

Date and time

MXPickerViewModeTime MXPickerViewModeDate MXPickerViewModeDateAndTime MXPickerViewModeCountDownTimer字体

[MXPickerView showWithSize:CGSizeMake(self.view.bounds.size.width, 200) pickerViewMode:mode updateBlock:^(MXPickerView *pickerView, MXPickerViewMode pickerViewMode, id uiDatePickerOrUIPickerView) {
        UIDatePicker *datePicker = (UIDatePicker *)uiDatePickerOrUIPickerView;
        datePicker.minuteInterval = 1;
        switch (mode) {
            case MXPickerViewModeTime: {
                //前1小时 - 后1小时
                datePicker.date = [NSDate date];
                datePicker.minimumDate = [NSDate dateWithTimeInterval:-1 * 60 * 60 sinceDate:datePicker.date];
                datePicker.maximumDate = [NSDate dateWithTimeInterval:1 * 60 * 60 sinceDate:datePicker.date];
                break;
            }
            case MXPickerViewModeDate:
            case MXPickerViewModeDateAndTime: {
                //前天 - 后天
                datePicker.date = [NSDate date];
                datePicker.minimumDate = [NSDate dateWithTimeInterval:-24 * 60 * 60 sinceDate:datePicker.date];
                datePicker.maximumDate = [NSDate dateWithTimeInterval:24 * 60 * 60 sinceDate:datePicker.date];
                break;
            }
            case MXPickerViewModeCountDownTimer: {
                datePicker.countDownDuration = 60 * 10;//选中为10分钟
                break;
            }
            default:
                break;
        }
        //pickerView.toolBarPositionBottom = YES; //默认为`NO`,`返回`和`肯定`按钮显示在顶部，当设为`YES`,`返回`和`肯定`按钮显示在底部
        //pickerView.topTipBarTitles = @[@"开始日期", @"结束日期"]; //不为`nil`时,`toolBarPositionBottom`会自动设置为`YES`，底部显示`返回`和`肯定`按钮，顶部显示`开始日期 - 结束日期`
        //pickerView.topTipBarH = 50; //`topTipBarTitles`一栏高度，默认是44
        //pickerView.toolBarH = 30; //`返回`和`肯定`按钮一栏高度，默认是44
        //pickerView.backgroundColor = [UIColor lightGrayColor];
        pickerView.doneButtonDidClickBlock = ^(MXPickerViewMode pickerViewMode, CGFloat countDownDuration, NSDate *date, id selectedTitleOrCustomModels) {
            NSLog(@"date: %@", date);
        };
    }];
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