Как выполнить поиск пробела "" in anattributedString от конца строки в обратном направлении, а затем получить диапазон этого пробела?
Я получаю строку с атрибутами из файла rtf, и из этого я делю ее на несколько строк с атрибутами, чтобы отображать их на экране в виде страниц.
Но когда я извлекаю атрибутированную строку, например, в диапазоне 500, последнее слово подстроки неполное.
Ниже приведен код класса AppDelegate:
// AppDelegate.swift
struct ScreenSize
{
static let SCREEN_WIDTH = UIScreen.mainScreen().bounds.size.width
static let SCREEN_HEIGHT = UIScreen.mainScreen().bounds.size.height
static let SCREEN_MAX_LENGTH = max(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)
static let SCREEN_MIN_LENGTH = min(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)
}
struct DeviceType
{
static let IS_IPHONE_4_OR_LESS = UIDevice.currentDevice().userInterfaceIdiom == .Phone && ScreenSize.SCREEN_MAX_LENGTH < 568.0
static let IS_IPHONE_5 = UIDevice.currentDevice().userInterfaceIdiom == .Phone && ScreenSize.SCREEN_MAX_LENGTH == 568.0
static let IS_IPHONE_6 = UIDevice.currentDevice().userInterfaceIdiom == .Phone && ScreenSize.SCREEN_MAX_LENGTH == 667.0
static let IS_IPHONE_6P = UIDevice.currentDevice().userInterfaceIdiom == .Phone && ScreenSize.SCREEN_MAX_LENGTH == 736.0
static let IS_IPAD = UIDevice.currentDevice().userInterfaceIdiom == .Pad && ScreenSize.SCREEN_MAX_LENGTH == 1024.0
}
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var pageText:[NSAttributedString] = []
var startIndex = 0
var endIndex = 500
var divideFactor = Int()
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
if DeviceType.IS_IPHONE_4_OR_LESS
{
endIndex = 700
}
else if DeviceType.IS_IPHONE_5
{
endIndex = 900
}
else if DeviceType.IS_IPHONE_6
{
endIndex = 1300
}
else if DeviceType.IS_IPHONE_6P
{
endIndex = 1700
}
else
{
endIndex = 2000
}
UINavigationBar.appearance().barTintColor = UIColor(red: 144.0/255, green: 14.0/255, blue: 0/255, alpha: 1.0)
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName:UIColor.whiteColor()]
UIBarButtonItem.appearance().tintColor = UIColor.whiteColor()
UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)
for var i=1 ; i<=1 ; i++ {
if let rtfPath = NSBundle.mainBundle().URLForResource("Quran2", withExtension: "rtf") {
let attributedStringWithRtf = NSMutableAttributedString(fileURL: rtfPath, options: [NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType], documentAttributes: nil, error: nil)!
var lengthOfRtf = attributedStringWithRtf.length
divideFactor = Int(lengthOfRtf/endIndex)
println(divideFactor)
self.updateTextFont(attributedStringWithRtf) (valueFactor: divideFactor)
}
}
return true
}
func updateTextFont(mystring:NSMutableAttributedString) (valueFactor:Int) {
let screenSizeMain: CGRect = UIScreen.mainScreen().bounds
let myAttriText:NSMutableAttributedString = mystring.mutableCopy() as! NSMutableAttributedString
myAttriText.beginEditing()
myAttriText.enumerateAttributesInRange(NSMakeRange(0, myAttriText.length), options: NSAttributedStringEnumerationOptions.Reverse) { (attribute, range, stop) -> Void in
var mutableAttributes = NSDictionary(dictionary: attribute)
var font:UIFont = mutableAttributes.objectForKey(NSFontAttributeName) as! UIFont
var newFont:UIFont = font.fontWithSize(font.pointSize)
if DeviceType.IS_IPAD
{
newFont = font.fontWithSize(font.pointSize+7)
}
var fontProperties:UIFontDescriptor = font.fontDescriptor()
let sizeNumber:Float = fontProperties.fontAttributes()[UIFontDescriptorSizeAttribute] as! Float
myAttriText.addAttribute(NSFontAttributeName, value: newFont, range: range)
}
for var i=0; i < valueFactor; i++ {
let range = NSMakeRange(startIndex, endIndex)
var nsText = myAttriText.attributedSubstringFromRange(range)
pageText.append(nsText)
println(endIndex)
}
myAttriText.endEditing()
}
func visibleRangeOfTextView(textView: NSAttributedString) -> NSRange {
return NSMakeRange(startIndex, endIndex)
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
