- 圆角阴影的使用导致界面卡顿尤其是在UICollectionView和UITableView中的使用，以下代码大部分情况下可以马上把你的帧数提高在55帧每秒以上，它会使视图渲染内容被缓存起来，下次绘制的时候可以直接显示缓存，当然要在视图内容不改变的情况下。
self.layer.shouldRasterize = YES;
self.layer.rasterizationScale = [UIScreen mainScreen].scale;
- 同时实现阴影和圆角(弄一个和图片大小一样的view，然后把UIImageView放到里面，代码如下)
self.headImage.layer.cornerRadius = 10;
self.headImage.layer.masksToBounds = YES;
self.shadowView.layer.shadowColor = RGB(40, 45, 65).CGColor;
self.shadowView.layer.shadowOffset = CGSizeMake(1, 2);
self.shadowView.layer.shadowOpacity = 0.1;
self.shadowView.layer.shadowRadius = 4.0;
self.shadowView.layer.cornerRadius = 4.0;
self.shadowView.clipsToBounds = NO;
- 使用 plist 存储的自定义对象时需要注意得时取出来的对象为不可变的，直接修改可能失败报错
存储自定义对象要进行编解码把需要存储的数据转换为NSData类型，取出来的时候再将NSData转换成自己的类型 Model需要继承NSCoding，实现以下方法
/** 给自定义Model进行编码 */
- (void)encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:self.ID forKey:@"id"];
[aCoder encodeObject:self.userCode forKey:@"userCode"];
[aCoder encodeObject:self.userName forKey:@"userName"];
[aCoder encodeObject:self.password forKey:@"password"];
[aCoder encodeObject:self.status forKey:@"status"];
[aCoder encodeObject:self.createTime forKey:@"createTime"];
[aCoder encodeObject:self.mobileNumber forKey:@"mobileNumber"];
[aCoder encodeObject:self.headImageName forKey:@"headImageName"];
[aCoder encodeBool:self.isOnWiFiDownLoad forKey:@"isOnWiFiDownLoad"];
[aCoder encodeBool:self.isAcceptInfo forKey:@"isAcceptInfo"];
}
/** 使用的时候还要进行解码 */
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder{
if (self = [super init]) {
self.ID = [aDecoder decodeObjectForKey:@"id"];
self.userCode = [aDecoder decodeObjectForKey:@"userCode"];
self.userName = [aDecoder decodeObjectForKey:@"userName"];
self.password = [aDecoder decodeObjectForKey:@"password"];
self.status = [aDecoder decodeObjectForKey:@"status"];
self.createTime = [aDecoder decodeObjectForKey:@"createTime"];
self.mobileNumber = [aDecoder decodeObjectForKey:@"mobileNumber"];
self.headImageName = [aDecoder decodeObjectForKey:@"headImageName"];
self.isAcceptInfo = [aDecoder decodeBoolForKey:@"isAcceptInfo"];
self.isOnWiFiDownLoad = [aDecoder decodeBoolForKey:@"isOnWiFiDownLoad"];
}
return self;
}
如果需要修改存储到plist 文件中的自定义模型的数据，必须要把从plist文件中取出来的自定义对象变为可变对象，这样操作才会有效，把不可变对象变为可变对象 需要使Model继承NSMutableCopying 实现以下方法
- (id)mutableCopyWithZone:(NSZone *)zone{
FXUserInfoModel *model = [[FXUserInfoModel allocWithZone:zone] init];
model.ID = self.ID;
model.userCode = self.userCode;
model.userName = self.userName;
model.password = self.password;
model.status =self.status;
model.createTime = self.createTime;
model.mobileNumber = self.mobileNumber;
model.headImageName = self.headImageName;
model.isAcceptInfo = self.isAcceptInfo;
model.isOnWiFiDownLoad = self.isOnWiFiDownLoad;
return model;
}
- 具体操作：
/** 从plist 中取出自定义对象*/
FXUserInfoModel *model = [[FXManager loadCustomObjectWithKey:[NSString stringWithFormat:@"%@+%@",@"FXUserInfoModel",[UserDefaultsUtils valueWithKey:@"userID"]]] mutableCopy];
/** 修改从plist中取出来的值 */
model.isOnWiFiDownLoad = NO;
/** 把修改后的值重新存回去 */
[FXManager saveCustomObject:model withKey:[NSString stringWithFormat:@"%@+%@",@"FXUserInfoModel",[UserDefaultsUtils valueWithKey:@"userID"]]];
······完美解决
- 如何实现互斥登陆，即同一账号只能同时在线一个用户，实现原理，服务器+友盟推送 实现同时只能在线一个账号
- 移动端需要我们设置HTTP请求头，给请求头传入和服务器端事先约定好的参数，这里我们传入两个参数：apiKey ，userId。第一个参数传注册友盟推送的时候系统回调传回来的deviceToken 这个参数是为了让后太推送确定把消息推送给指定的被下线的用户，第二个参数是为了确定用户的ID登录状态，我们还需要监听收到的通知，届时让服务器端配置一个自定义参数用于识别是否是下线通知，如果是，我们在当前界面做出响应，提示用户已下线。2.服务器端根据请求头的数据做出是否推送消息的动作，如果需要推送消息，则发送与移动端约定好的识别参数的通知。 具体代码如下
/** 第一步 在Application.m获取手机注册成功友盟推送回调得到deviceToken并保存 */
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
NSString *deviceTokenStr = [[[[deviceToken description] stringByReplacingOccurrencesOfString: @"<" withString: @""]
stringByReplacingOccurrencesOfString: @">" withString: @""]
stringByReplacingOccurrencesOfString: @" " withString: @""];
[UserDefaultsUtils saveValue:deviceTokenStr forKey:@"apiKey"];
NSDictionary *parameters = [[NSMutableDictionary alloc] init];
NSString *userStr =[NSString stringWithFormat:@"%@",[UserDefaultsUtils valueWithKey:@"userID"]];
if (!userStr || [userStr isEqualToString:@""]) {
[parameters setValue:userStr forKey:@"userId"];
}else{
[parameters setValue:@"" forKey:@"userId"];
}
[parameters setValue:[UserDefaultsUtils valueWithKey:@"apiKey"] forKey:@"apiKey"];
/** 动态设置请求头必须每次调用 updateBaseUrl 方法*/
[HYBNetworking updateBaseUrl:BaseUrl];
[HYBNetworking configCommonHttpHeaders:parameters];
}
/** 在前后台收到通知的时候判断是否为下线通知，如果是提示用户已下线，并且退出当前账号 */
//iOS10新增：处理前台收到通知的代理方法
-(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler{
NSDictionary * userInfo = notification.request.content.userInfo;
if([notification.request.trigger isKindOfClass:[UNPushNotificationTrigger class]]) {
//应用处于前台时的远程推送接受
//关闭U-Push自带的弹出框
[UMessage setAutoAlert:NO];
//必须加这句代码
[UMessage didReceiveRemoteNotification:userInfo];
if ([userInfo[@"operationError"] isEqualToString:@"1001"]) {
UIAlertController *alercConteoller = [UIAlertController alertControllerWithTitle:@"提示" message:@"当前账号已在其他设备登录，您已被迫下线" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionYes = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
[self signOutCurrentAccount];
}];
[alercConteoller addAction:actionYes];
[[FXManager getCurrentVC] presentViewController:alercConteoller animated:YES completion:nil];
}
}else{
//应用处于前台时的本地推送接受
}
//当应用处于前台时提示设置，需要哪个可以设置哪一个
completionHandler(UNNotificationPresentationOptionSound|UNNotificationPresentationOptionBadge|UNNotificationPresentationOptionAlert);
}
//iOS10新增：处理后台点击通知的代理方法
-(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler{
NSDictionary * userInfo = response.notification.request.content.userInfo;
if([response.notification.request.trigger isKindOfClass:[UNPushNotificationTrigger class]]) {
//应用处于后台时的远程推送接受
//必须加这句代码
[UMessage didReceiveRemoteNotification:userInfo];
if ([userInfo[@"operationError"] isEqualToString:@"1001"]) {
UIAlertController *alercConteoller = [UIAlertController alertControllerWithTitle:@"提示" message:@"当前账号已在其他设备登录，您已被迫下线" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionYes = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
[self signOutCurrentAccount];
}];
[alercConteoller addAction:actionYes];
[[FXManager getCurrentVC] presentViewController:alercConteoller animated:YES completion:nil];
}
}else{
//应用处于后台时的本地推送接受
}
}
