如何逐行阅读uitextview文本？

Question

我有uitextview文本.我想逐行阅读.我希望它适用于iOS 5并且没有- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text;委托方法.我怎样才能做到这一点？

Answer 1

您可以使用textview的布局管理器来获取这些内容.但是,可以从iOS版7.您可以使用布局管理器的方法- (enumerateLineFragmentsForGlyphRange:usingBlock: )

以下代码打印结果如图所示

textView.text =@"abcdsakabsbdkjflk sadjlkasjdlk asjkdasdklj asdpaandjs bajkhdb hasdskjbnas kdbnkja sbnkasj dbkjasd kjk aj";

NSLog(@"%d",_textView.text.length); // length here is 104.

[_textView.layoutManager enumerateLineFragmentsForGlyphRange:NSMakeRange(0, 104) usingBlock:^(CGRect rect, CGRect usedRect, NSTextContainer *textContainer, NSRange glyphRange, BOOL *stop) {

NSLog(@"rect %@ - usedRect %@ - glymph Rangle %d %d -",NSStringFromCGRect(rect),NSStringFromCGRect(usedRect),glyphRange.location,glyphRange.length);
    }]
;

打印结果

2013-12-17 12:48:40.250 testEmpty[675:a0b] rect {{0, 0}, {200, 13.8}} - usedRect {{0, 0}, {176.08398, 13.8}} - glymph Rangle 0 31 -
2013-12-17 12:48:40.251 testEmpty[675:a0b] rect {{0, 13.8}, {200, 13.8}} - usedRect {{0, 13.8}, {182.11328, 13.8}} - glymph Rangle 31 31 -
2013-12-17 12:48:40.251 testEmpty[675:a0b] rect {{0, 27.6}, {200, 13.8}} - usedRect {{0, 27.6}, {168.75977, 13.8}} - glymph Rangle 62 28 -
2013-12-17 12:48:40.252 testEmpty[675:a0b] rect {{0, 41.400002}, {200, 13.8}} - usedRect {{0, 41.400002}, {82.035156, 13.8}} - glymph Rangle 90 14 -

因此,在块的每次运行中,您将获得glymphRange.length作为该行中使用的字符串的长度.

Answer 2

使用:

NSArray *lines = [textView.text componentsSeparatedByString:@"\n"];

您的数组有行,每行都在索引中.