本文介绍了在"UIDatePicker"类型的对象上找不到属性"preferredDatePickerStyle"的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我使用的是react-native 0.62.2版本和datetimepicker版本3.0.1.当我尝试使用xcode构建项目时,显示以下错误:

I am using react-native 0.62.2 version and datetimepicker version 3.0.1. As I am trying to build the project with xcode, the following errors are being shown:

  1. 使用未声明的标识符'UIDatePickerStyleCompact'
  2. 使用未声明的标识符'UIDatePickerStyleWheels'
  3. 在类型的对象上找不到属性'preferredDatePickerStyle'"RNDateTimePicker *"
  4. 在类型的对象上找不到属性'preferredDatePickerStyle''UIDatePicker *'
  5. "NSInteger"(又名"long")到"id"的隐式转换是不允许使用ARC
  6. 声明需要整数类型的表达式('__strong id'无效)
  7. "UIDatePickerMode"(又名枚举")的隐式转换ARC不允许将UIDatePickerMode')更改为'id'
  8. 使用未声明的标识符'UIDatePickerStyleWheels'

以下是 RNDateTimePickerManager.h

#import "RNDateTimePickerManager.h"

#import <React/RCTBridge.h>
#import <React/RCTEventDispatcher.h>
#import "RNDateTimePicker.h"
#import <React/UIView+React.h>

@implementation RCTConvert(UIDatePicker)

RCT_ENUM_CONVERTER(UIDatePickerMode, (@{
  @"time": @(UIDatePickerModeTime),
  @"date": @(UIDatePickerModeDate),
  @"datetime": @(UIDatePickerModeDateAndTime),
}), UIDatePickerModeTime, integerValue)

RCT_ENUM_CONVERTER(UIDatePickerStyle, (@{                //Error 5
    @"default": @(UIActionSheetStyleAutomatic),
    @"compact": @(UIDatePickerStyleCompact),             //Error 1
    @"spinner": @(UIDatePickerStyleWheels),              //Error 2
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 140000
    @"inline": @(UIDatePickerStyleInline),
#endif
}), UIActionSheetStyleAutomatic, integerValue)

@end

@implementation RNDateTimePickerManager

RCT_EXPORT_MODULE()

- (UIView *)view
{
  return [RNDateTimePicker new];
}

+ (NSString*) datepickerStyleToString: (UIDatePickerStyle) style {
    // RCTConvert does not handle this.?
    switch (style) {                                       //Error 6
        case UIDatePickerStyleCompact:
            return @"compact";
        case UIDatePickerStyleWheels:
            return @"spinner";
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 140000
        case UIDatePickerStyleInline:
            return @"inline";
#endif
        default:
            [NSException raise:@"Unsupported style value" format:@"UIDatePickerStyle of %ld is unsupported", (long)style];
            return @"";
    }
}

RCT_EXPORT_METHOD(getDefaultDisplayValue:(NSDictionary *)options resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
    dispatch_async(dispatch_get_main_queue(), ^{
        UIDatePicker* view = [RNDateTimePicker new];

        view.preferredDatePickerStyle = UIActionSheetStyleAutomatic;          //Error 4
        UIDatePickerMode renderedMode = [RCTConvert UIDatePickerMode:options[@"mode"]];
        view.datePickerMode = renderedMode;
        // NOTE afaict we do not need to measure the actual dimensions here, but if we do, just look at the original PR

        UIDatePickerMode determinedDisplayValue = view.datePickerMode;    //Error 7

        resolve(@{
                 @"determinedDisplayValue": [RNDateTimePickerManager datepickerStyleToString:determinedDisplayValue],
                });
    });
}

RCT_EXPORT_VIEW_PROPERTY(date, NSDate)
RCT_EXPORT_VIEW_PROPERTY(locale, NSLocale)
RCT_EXPORT_VIEW_PROPERTY(minimumDate, NSDate)
RCT_EXPORT_VIEW_PROPERTY(maximumDate, NSDate)
RCT_EXPORT_VIEW_PROPERTY(minuteInterval, NSInteger)
RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
RCT_REMAP_VIEW_PROPERTY(mode, datePickerMode, UIDatePickerMode)
RCT_REMAP_VIEW_PROPERTY(timeZoneOffsetInMinutes, timeZone, NSTimeZone)

RCT_CUSTOM_VIEW_PROPERTY(textColor, UIColor, RNDateTimePicker)
{
    if (@available(iOS 14.0, *) && view.datePickerMode != UIDatePickerStyleWheels) {  //Error 8
    // prevents #247
    return;
  }
  if (json) {
    [view setValue:[RCTConvert UIColor:json] forKey:@"textColor"];
    [view setValue:@(NO) forKey:@"highlightsToday"];
  } else {
    UIColor* defaultColor;
    if (@available(iOS 13.0, *)) {
        defaultColor = [UIColor labelColor];
    } else {
        defaultColor = [UIColor blackColor];
    }
    [view setValue:defaultColor forKey:@"textColor"];
    [view setValue:@(YES) forKey:@"highlightsToday"];
  }
}

// TODO vonovak setting preferredDatePickerStyle invalidates minuteinterval
RCT_CUSTOM_VIEW_PROPERTY(displayIOS, UIDatePickerStyle, RNDateTimePicker)
{
    if (@available(iOS 13.4, *)) {
        if (json) {
            UIDatePickerMode propValue = [RCTConvert UIDatePickerStyle:json];
            view.preferredDatePickerStyle = propValue;           //Error 3
        } else {
            view.preferredDatePickerStyle = UIActionSheetStyleAutomatic;
        }
    }
}

@end

react-native datetimepicker中是否存在任何错误?

Is there any bug in the react-native datetimepicker?

推荐答案

对于仍然坚持此方法的人,尤其是使用库.

For those who are still stuck on this, specifically using this library.

从3.0.3版本开始,它要求您的Xcode至少为v11,但他们从未提及v11.3不能正常工作,这已经被很多人注意到您至少需要v11.6.

Starting from version 3.0.3, it require that your Xcode is at least v11 but they never mention that v11.3 will not work which a lot of people already noticed that you will need at least v11.6.

请介意,降级可能对您没有帮助,因为您错过了解决许多错误的更新点,例如修复#217

Mind you, downgrading might not really help you either as you're missing the point of update which addresses a lot of bugs e.g #217 fix

这篇关于在"UIDatePicker"类型的对象上找不到属性"preferredDatePickerStyle"的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-04 03:13
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