iOS14增加了精確位置開關(guān),當(dāng)獲取定位權(quán)限，用戶關(guān)閉了精確位置

比如獲取當(dāng)前連接的WiFi信息的時候，會無法獲取

1. 在info.plist中設(shè)置對應(yīng)場景的key和value

key用于申請該場景的精確位置權(quán)限，value用于申請權(quán)限時的描述

    <key>NSLocationTemporaryUsageDescriptionDictionary</key>
     <dict>
     <key>wifiListPurposeKey</key>
     <string>應(yīng)用需要精確位置獲取附近WiFi信息,用于配置設(shè)備網(wǎng)絡(luò)</string>
    </dict>

wifiListPurposeKey在后續(xù)場景申請權(quán)限時用到，必須保持一致

2. 獲取當(dāng)前精確位置開關(guān)狀態(tài)

#import <CoreLocation/CoreLocation.h>

- (void)preciseSwitch:(void(^)(BOOL))complete {
    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    if (@available(iOS 14.0, *)) {
        CLAccuracyAuthorization accuracy = [locationManager accuracyAuthorization];
        if (accuracy == CLAccuracyAuthorizationFullAccuracy) {
            if (complete) {
                complete(YES);
            }
        } else {
            if (complete) {
                complete(NO);
            }
            [locationManager requestTemporaryFullAccuracyAuthorizationWithPurposeKey:@"wifiListPurposeKey"
                                                                          completion:^(NSError * _Nullable error) {
            }];
        }
    } else {
        if (complete) {
            complete(YES);
        }
    }
}

• 這邊做個版本保護，只有14以上才需要判斷開關(guān)狀態(tài)。

- (void)requestTemporaryFullAccuracyAuthorizationWithPurposeKey:(NSString *)purposeKey completion:(void(^ _Nullable)(NSError * _Nullable))completion

• 需要注意的是這里的completion并不是用戶選擇授權(quán)后的回調(diào)，應(yīng)該是授權(quán)過程的中異常回調(diào)，而不是用戶選擇的回調(diào).

• 如果需要在用戶選擇授權(quán)后處理邏輯，可以考慮在監(jiān)聽這個UIApplicationDidBecomeActiveNotification事件，在這里去處理。

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil];