In PHP I'd do something like this:
在PHP中,我会做这样的事情:
But in Objective-C, I tried this:
但在Objective-C中,我试过这个:
regex = [NSRegularExpression regularExpressionWithPattern:@"\\.([a-zA-Z0-9])" options:NSRegularExpressionCaseInsensitive error:&error];
result = [regex stringByReplacingMatchesInString:result options:0 range:NSMakeRange(0, [result length]) withTemplate:@". \1"];
But it ends up simply removing the first letter of the next sentence (such as "end. Chris" -> "end. hris"). Why is this?
但它最终只是删除下一句的第一个字母(例如“结束。克里斯” - >“结束.hris”)。为什么是这样?
1 个解决方案
#1
3
Use $1, $2, etc. instead of \1, \2, etc. for back references.
使用$ 1,$ 2等代替\ 1,\ 2等进行反向引用。
See the docs for NSRegularExpression. Look under the "Template Matching Format" section.
请参阅NSRegularExpression的文档。查看“模板匹配格式”部分。
#1
3
Use $1, $2, etc. instead of \1, \2, etc. for back references.
使用$ 1,$ 2等代替\ 1,\ 2等进行反向引用。
See the docs for NSRegularExpression. Look under the "Template Matching Format" section.
请参阅NSRegularExpression的文档。查看“模板匹配格式”部分。