ios - 拆分属性字符串并保留格式

如何在保持格式的同时获取现有的 NSAttributedString 并根据预定义的分隔符对其进行划分？ componentsSeparatedByString 似乎不会对 NSAttributedString 进行操作。

我目前的解决方法在正确的点产生分割，但只输出一个 NSString。从而失去格式。

NSData *rtfFileData = [NSData dataWithContentsOfFile:path];
NSAttributedString *rtfFileAttributedString = [[NSAttributedString alloc] initWithData:rtfFileData options:@{NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType} documentAttributes:nil error:nil];
NSString *rtfFileString = [rtfFileAttributedString string];
NSString *importSeparator = @"###";
// Wish I could do this
// NSArray *separatedArray = [rtfFileAttributedString componentsSeparatedByString:importSeparatorPref];
NSArray *separatedArray = [rtfFileString componentsSeparatedByString:importSeparatorPref];
NSLog( @"Separated array: %@", separatedArray );

最佳答案

您可以使用拆分的非属性字符串来拆分属性字符串。一种选择是:

NSData *rtfFileData = [NSData dataWithContentsOfFile:path];
NSAttributedString *rtfFileAttributedString = [[NSAttributedString alloc] initWithData:rtfFileData options:@{NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType} documentAttributes:nil error:nil];
NSString *rtfFileString = [rtfFileAttributedString string];
NSString *importSeparator = @"###";
NSArray *separatedArray = [rtfFileString componentsSeparatedByString:importSeparatorPref];

NSMutableArray *separatedAttributedArray = [NSMutableArray arrayWithCapacity:separatedArray.count];
NSInteger start = 0;
for (NSString *sub in separatedArray) {
    NSRange range = NSMakeRange(start, sub.length);
    NSAttributedString *str = [rtfFileAttributedString attributedSubstringFromRange:range];
    [separatedAttributedArray addObject:str];
    start += range.length + importSeparator.length;
}

NSLog(@"Separated attributed array: ", separatedAttributedArray);

关于ios - 拆分属性字符串并保留格式，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31250074/