Ios 如何仅从字符串开头删除点
我的字符串文本类似于-Ios 如何仅从字符串开头删除点,ios,objective-c,nsstring,Ios,Objective C,Nsstring,我的字符串文本类似于- 1) .....bla ..bla... 2)...bla.. bla…bla. 3).bla.. bla…bla. 点不是静态的。我只想从一开始就删除点。不是所有的点 我试过这个 NSString *newString = [myString stringByReplacingOccurrencesOfString:@"." withString:@""]; 但这是去除所有点。试试这个 NSString* regex = @"^\\.*"; NSString* in
1) .....bla ..bla...
2)...bla.. bla…bla.
3).bla.. bla…bla.
点不是静态的。我只想从一开始就删除点。不是所有的点
我试过这个
NSString *newString = [myString stringByReplacingOccurrencesOfString:@"." withString:@""];
但这是去除所有点。试试这个
NSString* regex = @"^\\.*";
NSString* input = @"....abc..z";
NSString* output = [input stringByReplacingOccurrencesOfString:regex withString:@"" options:NSRegularExpressionSearch range: [input rangeOfString:input]];
试试这个。试试这个:
NSString *str = @"...Videt...IDL";
__block NSInteger loc = 0;
[str enumerateSubstringsInRange:NSMakeRange(0, str.length) options:NSStringEnumerationByWords usingBlock:^(NSString * _Nullable substring, NSRange substringRange, NSRange enclosingRange, BOOL * _Nonnull stop) {
loc = substringRange.location;
*stop = YES;
}];
NSString *convStr = [str substringFromIndex:loc];
NSLog(@"%@", convStr);
NSString*str=@“…bla…bla…bla”;
NSCharacterSet*字符集=[NSCharacterSet-letterCharacterSet];
int-letterNO=0;
对于(int i=0;iNSString*regex=@“^\\\*”;@tailer,应该是这样:NSString*regex=@“^\\\\*”;
@MarekR是正确的。我的错误,谢谢。NSString*regex=@“^\\\\\*”;
这个正则表达式是正确的。请共享输入字符串。更优雅,输入的内容更少
NSString *str = @"...Videt...IDL";
__block NSInteger loc = 0;
[str enumerateSubstringsInRange:NSMakeRange(0, str.length) options:NSStringEnumerationByWords usingBlock:^(NSString * _Nullable substring, NSRange substringRange, NSRange enclosingRange, BOOL * _Nonnull stop) {
loc = substringRange.location;
*stop = YES;
}];
NSString *convStr = [str substringFromIndex:loc];
NSLog(@"%@", convStr);
NSString *str = @"....bla .... bla..... bla";
NSCharacterSet *charSet = [NSCharacterSet letterCharacterSet];
int letterNO = 0;
for (int i =0; i<str.length; i++)
{
NSString *letter = [NSString stringWithFormat:@"%c",[str characterAtIndex:i]];
if ([letter rangeOfCharacterFromSet:charSet].location != NSNotFound)
{
letterNO = i;
break;
}
}
NSString * newString = [str substringFromIndex:letterNO];
NSLog(@"newString %@",newString);