iOS开发：App版本更新提示框的使用方法-白红宇

iOS开发：App版本更新提示框的使用方法

阅读量：140 次

发布时间：2019-02-27

本文共 5661 字，大约阅读时间需要 18 分钟。

在iOS开发过程中，版本更新提示框是提醒用户更新App的重要组件。通过使用第三方库可以简化实现过程，以下是具体的实现方法和步骤。

使用第三方库实现版本更新提示框

为了实现版本更新提示框，首先需要对第三方库进行封装，并将相关工具类集成到项目中。以下是详细的实现步骤：

1. 创建头文件

#import 
   
    #import 
    
     @interface AppUpdater : NSObject 
     
      + (id)sharedUpdater;- (void)showUpdateWithForce;- (void)showUpdateWithConfirmation;- (void)forceOpenNewAppVersion:(BOOL)force;@property (nonatomic, weak) NSString *alertTitle;@property (nonatomic, weak) NSString *alertMessage;@property (nonatomic, weak) NSString *alertUpdateTitle;@property (nonatomic, weak) NSString *alertCancelTitle;@end

2. 实现头文件的方法

#import "AppUpdater.h"@implementation AppUpdater+ (id)sharedUpdater {    static dispatch_once_t onceToken;    static id sharedUpdater;    dispatch_once(&onceToken, ^{        sharedUpdater = [[AppUpdater alloc] init];    });    return sharedUpdater;}- (id)init {    self = [super init];    if (self) {        self.alertTitle = @"更新提示";        self.alertMessage = @"新版本%@已经上线，快来更新吧!";        self.alertUpdateTitle = @"前往更新";        self.alertCancelTitle = @"暂不更新";    }    return self;}- (void)showUpdateWithForce {    if ([self isConnection]) {        [self checkNewAppVersion:^(BOOL newVersion, NSString *version) {            if (newVersion) {                [self alertUpdateForVersion:version withForce:YES];            }        }];    }}- (void)showUpdateWithConfirmation {    if ([self isConnection]) {        [self checkNewAppVersion:^(BOOL newVersion, NSString *version) {            if (newVersion) {                [self alertUpdateForVersion:version withForce:NO];            }        }];    }}- (void)forceOpenNewAppVersion:(BOOL)force {    if ([self isConnection]) {        [self checkNewAppVersion:^(BOOL newVersion, NSString *version) {            if (newVersion) {                [self alertUpdateForVersion:version withForce:force];            }        }];    }}- (BOOL)isConnection {    const char *host = "itunes.apple.com";    BOOL reachable;    BOOL success;    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(NULL, host);    SCNetworkReachabilityFlags flags;    success = SCNetworkReachabilityGetFlags(reachability, &flags);    reachable = success && (flags & kSCNetworkFlagsReachable) && !(flags & kSCNetworkFlagsConnectionRequired);    CFRelease(reachability);    return reachable;}- (void)checkNewAppVersion:(void (^)(BOOL newVersion, NSString *version))completion {    NSDictionary *bundleInfo = [[NSBundle mainBundle] infoDictionary];    NSString *currentVersion = bundleInfo[@"CFBundleShortVersionString"];    NSURL *lookupURL = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/cn/lookup?id=%@", KAPPID]];    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{        NSData *lookupResults = [NSData dataWithContentsOfURL:lookupURL];        if (!lookupResults) {            completion(NO, nil);            return;        }        NSDictionary *jsonResults = [NSJSONSerialization JSONObjectWithData:lookupResults options:0 error:nil];        dispatch_async(dispatch_get_main_queue(), ^{            NSUInteger resultCount = [jsonResults[@"resultCount"] integerValue];            if (resultCount) {                NSDictionary *appDetails = [jsonResults[@"results"] firstObject];                NSString *appItunesUrl = [appDetails[@"trackViewUrl"] stringByReplacingOccurrencesOfString:@"&uo=4" withString:@""];                NSString *latestVersion = appDetails[@"version"];                if ([latestVersion compare:currentVersion options:NSNumericSearch] == NSOrderedDescending) {                    appStoreURL = appItunesUrl;                    completion(YES, latestVersion);                } else {                    completion(NO, nil);                }            } else {                completion(NO, nil);            }        });    });}- (UIAlertView *)alertUpdateForVersion:(NSString *)version withForce:(BOOL)force {    NSString *msg = [NSString stringWithFormat:self.alertMessage, version];    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:self.alertTitle message:msg delegate:self cancelTitle:force ? nil : self.alertUpdateTitle otherButtonTitles:force ? self.alertUpdateTitle : self.alertCancelTitle, nil];    return alert;}- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {    if (buttonIndex == 0) {        NSURL *appUrl = [NSURL URLWithString:appStoreURL];        if ([[UIApplication sharedApplication] canOpenURL:appUrl]) {            [[UIApplication sharedApplication] openURL:appUrl];        } else {            UIAlertView *cantOpenUrlAlert = [[UIAlertView alloc] initWithTitle:@"Not Available" message:@"Could not open the AppStore, please try again later." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];            [cantOpenUrlAlert show];        }    }}@end

3. AppDelegate中的集成实现

在AppDelegate.m中添加以下代码：

#import "AppDelegate.h"#import "BaseTabBarController.h"#import "AppUpdater.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    sleep(3); // 设置启动页显示时间    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];        [[AppUpdater sharedUpdater] showUpdateWithConfirmation];        BaseTabBarController *tabController = [BaseTabBarController new];    self.window.rootViewController = tabController;    return YES;}@end

测试步骤

在Xcode中将App版本号修改为低于当前版本号。

运行项目并在模拟器中测试弹框效果。

如果弹框未显示，检查网络连接是否正常。

确认AppStore URL是否正确配置。

通过以上步骤，可以实现iOS应用版本更新提示框的功能，确保用户及时更新到最新版本。

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