在“UIDatePicker”类型的对象上找不到属性“preferredDatePickerStyle”

Posted 2023-02-23

【中文标题】在“UIDatePicker”类型的对象上找不到属性“preferredDatePickerStyle”

【英文标题】：Property 'preferredDatePickerStyle' not found on object of type 'UIDatePicker'

【发布时间】：2020-08-26 07:17:28

【问题描述】：

我正在使用 react-native 0.62.2 版本和 datetimepicker 3.0.1 版本。当我尝试使用 xcode 构建项目时，显示以下错误：

使用未声明的标识符“UIDatePickerStyleCompact” 使用未声明的标识符“UIDatePickerStyleWheels” 在类型的对象上找不到属性“preferredDatePickerStyle” 'RNDateTimePicker *' 在类型的对象上找不到属性“preferredDatePickerStyle” 'UIDatePicker*' “NSInteger”（又名“long”）到“id”的隐式转换是 ARC不允许 语句需要整数类型的表达式（'__strong id' 无效） “UIDatePickerMode”（又名“枚举”）的隐式转换 ARC 不允许将 UIDatePickerMode') 转换为 'id' 使用未声明的标识符“UIDatePickerStyleWheels”

以下是RNDateTimePickerManager.h

里面的代码

#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 中是否有任何错误？

【参考方案1】：

对于那些仍然坚持这一点的人，特别是使用this 库。

从版本 3.0.3 开始，它要求您的 Xcode 至少为 v11，但他们从未提到 v11.3 将无法工作，很多人已经注意到您至少需要 v11.6。

请注意，降级也可能对您没有真正的帮助，因为您错过了解决许多错误的更新点，例如 #217 fix

【参考方案2】：

您可以使用最新的稳定版 XCode (11.6)。

【讨论】：

真正随机的问题。但是将 Xcode v11.3 更新到 v12.0 解决了这个问题。

【参考方案3】：

对此的最佳答案是将 xcode 更新到至少 v11.6。我已经解决这个问题超过 48 小时，最后当应用程序成功构建完成时，我与缺少的依赖项作斗争。