Firebase Analytics-按操作系统主要版本划分的受众

Question

难道没有人知道什么才是正确的条件吗？谢谢

Answer 1

因为在iOS版本（major.minor.patch）中有两个小数点，所以属性是字符串而不是数字。最简单的做法是在Firebase web控制台中创建一个名为“IOSMajorVersion”的用户属性。转到Analytics：User Properties进行此操作。然后在您的代码中，获取主要版本并向Firebase报告。确保您在每个用户会话中只执行一次此操作会有帮助。在Objective-C中，可以通过块或异步GDC调度来完成。

您没有提到您使用的是Objective-C还是Swift，但下面是您如何做到这一点的方法。

目标-C

@import Foundation;
@import Firebase;
@import UIKit;


+ (void)sendMajorOSVersionToFirebase
{
    // This can only be executed once per app session.

    UIDevice *myDevice = [UIDevice currentDevice];
    NSString *iOSVersion = [myDevice systemVersion];
    NSString *majorVersionNum;

    // Two methods of getting the major version from the string
    // Method 1: componentsSeparatedByString
    NSArray *systemVersionArray = [iOSVersion componentsSeparatedByString:@"."];
    majorVersionNum = [systemVersionArray firstObject];

    // Method 2: range and substringToIndex
    NSRange range = [iOSVersion rangeOfString:@"." options: nil];
    majorVersion = [iOSVersion substringToIndex: range.location];

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{
        [FIRAnalytics setUserPropertyString:majorVersion forName:@"iOSMajorVersion"];
    });
}

import Firebase
import Foundation
import UIKit

class func sendMajorOSVersionToFirebase() {
    // This can only be executed once per app session.

    let myDevice = UIDevice.current
    let iOSVersion = myDevice.systemVersion
    var majorVersionNum: String

    // Two methods of getting the major version from the string
    // Method 1: componentsSeparatedByString
    let systemVersionArray = iOSVersion.components(separatedBy: ".")
    majorVersionNum = systemVersionArray.first ?? ""

    // Method 2: range and substringToIndex
    let range: NSRange = (iOSVersion as NSString).range(of: ".", options: nil)
    majorVersion = (iOSVersion as? NSString)?.substring(to: range.location)

    // TODO: ensure that the code below is executed only once.
    {
        FIRAnalytics.setUserPropertyString(majorVersion, forName: @"iOSMajorVersion")
    }
}