ios ~ 登录、自定义启动页、首页

一、原理：设置rootViewController

在APPdelegate.m 中判断是否登录，跳转登录页、首页。

进入APP，启动页，再判断是否登录，再跳到登录页或首页。

APPdelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;


@end

APPdelegate.m

@interface AppDelegate ()<UIApplicationDelegate, UITabBarControllerDelegate,WXApiDelegate>

@property (nonatomic,strong)GWMainTabBarController *tabbarController;
@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    NSLog(@"这是一条测试push");
    [NSThread sleepForTimeInterval:0.01]; // 缩短系统启动页时间

    // 启动页（自定义）：
    StartPageAnimationCRTL *startPageAnimationVC = [[GWStartPageAnimationCRTL alloc] init];
    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:startPageAnimationVC];
    
  // 自定义启动页加载完毕（控制时间），判断是否登录
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5f *NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        //判断是否第一次登录
        if ([UserInfoContext sharedUserInfoContext].userInfo.token &&[UserInfoContext sharedUserInfoContext].userInfo.name.length !=0) {
            self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:self.tabbarController];
            
        } else {
            LoginViewController *loginVC = [[GWLoginViewController alloc] init];
            self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:loginVC];
        }
    });

}

//添加监听用于登录
-(void)addNotifiMethod{

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loginMethod:) name:@"login_login" object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(logoutMethod:) name:@"login_logout" object:nil];

    // 去登录页VC调用
    [[NSNotificationCenter defaultCenter] postNotificationName:@"login_login" object:nil];
}
-(void)loginMethod:(NSNotification *)notifi{
    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:self.tabbarController];
}
-(void)logoutMethod:(NSNotification *)notifi{
    //退出登录 停止轮训
    [[GWRotationService sharedMessageService] stopRefreshTimer];
    [GWUtilities removeUserInfoModelInUserDefAultes];
    GWLoginViewController *loginVC = [[GWLoginViewController alloc] init];
    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:loginVC];
}

二、自定义启动页

原理：多张图片设置动图效果，（最后一张图片可以复制多张一样的，形成最后一张图“停一下”的效果）。

#import "GWStartPageAnimationView.h"

@interface GWStartPageAnimationView ()

@property (nonatomic, strong) UIImageView *animationImg;

@end

@implementation GWStartPageAnimationView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = RGBA(0, 0, 0, 1);
        
        
        UIImage *image = [UIImage imageNamed:@"startPageAnimation_welcome_icon1.png"];
        CGFloat iconHeight = self.frame.size.width * (image.size.height / image.size.width);
        
        _animationImg = [[UIImageView alloc] init];
        [self addSubview:self.animationImg];
        [self.animationImg makeConstraints:^(MASConstraintMaker *make) {
//            make.edges.equalTo(self);
            make.center.width.equalTo(self);
            make.height.mas_equalTo(iconHeight);
        }];
        
        self.animationImg.animationImages = [self animationImages]; // 获取 Gif 图片列表
        self.animationImg.animationDuration = 1.5;                    // 执行一次完整动画所需的时长
        self.animationImg.animationRepeatCount = 1;                 // 动画重复次数
        [self.animationImg startAnimating];
    }
    return self;
}

- (NSArray *)animationImages {
    
    NSMutableArray *images = [NSMutableArray arrayWithCapacity:26];
    for (int i = 0; i < 33; i++) {
        NSString *imageStr = [NSString stringWithFormat:@"startPageAnimation_welcome_icon%d.png",i + 1];
        UIImage *image = [UIImage imageNamed:imageStr];
        [images addObject:image];
    }
    
    return images;
    
}