Ilovada rasmlarning yuklanish vaqtini qanday yaxshilash mumkin?

Ilovada rasm yuklash vaqtini yaxshilash uchun bir nechta yondashuvlardan foydalanish mumkin:

• Rasm optimallashtirish: sifatni yo'qotmasdan siqish, zamonaviy formatlardan foydalanish (WebP, HEIF).
• Lazy loading: foydalanuvchi ko'rish zonasida bo'lsa, faqat shunda rasm yuklash.
• Kesh: lokal kesh va HTTP keshdan foydalanib, yuklangan rasmni qayta ishlatish.
• CDN: kechikishni kamaytirish uchun Content Delivery Network orqali rasm saqlash va yetkazib berish.
• Asinxron yuklash: fon rejimida rasm yuklash, asosiy UI oqimini bloklamasdan.
• Rasm o'lchamlari: rasm o'lchamini ko'rsatish o'lchamiga moslashtirish, keraksiz baytlarni yuklamaslik uchun.

Swiftda lazy loading va kesh bilan misol:

let imageCache = NSCache<NSString, UIImage>()

func loadImage(from urlString: String, completion: @escaping (UIImage?) -> Void) {
    if let cachedImage = imageCache.object(forKey: urlString as NSString) {
        completion(cachedImage)
        return
    }
    guard let url = URL(string: urlString) else {
        completion(nil)
        return
    }
    DispatchQueue.global().async {
        if let data = try? Data(contentsOf: url), let image = UIImage(data: data) {
            imageCache.setObject(image, forKey: urlString as NSString)
            DispatchQueue.main.async {
                completion(image)
            }
        } else {
            DispatchQueue.main.async {
                completion(nil)
            }
        }
    }
}