我写了一个代码来替换删除NSString中的子字符串...我的逻辑是使用'rangeofString'查找每个子字符串字符的位置，然后使用'ReplaceOccurance'用空格替换子字符串字符，然后修剪空白字符。但是在replaceOccurance行中出现错误
*** Terminating app due to uncaught exception 'NSRangeException', reason: '-[__NSCFString replaceOccurrencesOfString:withString:options:range:]: Range or index out of bounds'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff85614b06 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff83c4e3f0 objc_exception_throw + 43
2 CoreFoundation 0x00007fff856148dc +[NSException raise:format:] + 204
3 CoreFoundation 0x00007fff85613520 -[__NSCFString replaceOccurrencesOfString:withString:options:range:] + 224
4 Foundation 0x00007fff8d433a12 -[NSString stringByReplacingOccurrencesOfString:withString:options:range:] + 170
5 tester 0x00000001000019a1 deleteWithSubstring + 865
6 tester 0x0000000100001d35 main + 133
7 libdyld.dylib 0x00007fff89e267e1 start + 0
8 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminate called throwing an exception....
这是我的代码。
NSString* deleteWithSubstring(NSString *s1,NSString *sub)
{
long int length=[sub length],range=0;
NSRange r;
for(int i=0;i<length;i++)
{
range=[s1 rangeOfString:[NSString stringWithFormat:@"%c",[sub characterAtIndex:i]]options:NSCaseInsensitiveSearch range:NSMakeRange(range,[s1 length]-1)].location;
r=NSMakeRange(range,[s1 length]-1);
NSLog(@"%ld %ld",r.location,r.length);
if(range!=NSNotFound)
{
s1=[s1 stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%c",[sub characterAtIndex:i]] withString:@" " options:NSCaseInsensitiveSearch range:r];
}
}
s1=[s1 stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
return s1;
}
int main(int argc, const char * argv[])
{
@autoreleasepool {
NSString *str1,*str2;
str1=@"Hdida";
str2=@"fHsdai";
NSLog(@"Loc B:%@ ",,deleteWithSubstring(str2,@"ha"));
}
return 0;
}
实际上我解决了范围问题。由于重写代码，我误认为seocond参数不是上限，而是长度..应如下所示
NSString* deleteWithSubstring(NSString *s1,NSString *sub)
{
long int length=[sub length],range=0,ndeleted=0;
NSMutableString *s2=[[NSMutableString alloc]initWithString:s1];
NSRange r;
for(int i=0;i<length;i++)
{
range=[s1 rangeOfString:[NSString stringWithFormat:@"%c",[sub characterAtIndex:i]]options:NSCaseInsensitiveSearch range:NSMakeRange(range,[s1 length]-range)].location;
r=NSMakeRange((range-ndeleted),1);
NSLog(@"%ld %ld" ,r.location,r.length);
if(range!=NSNotFound)
{
[s2 deleteCharactersInRange:r];
ndeleted++;
}
}
NSLog(@"%@",s2);
return s2;
}
试试下面的代码，
NSString* deleteWithSubstring(NSMutableString *s1,NSString *sub)
{
NSRange r;
for(int i = 0; i < [s1 length]; i++)
{
//findout the range with "sub" string
r = [s1 rangeOfString:sub options:NSCaseInsensitiveSearch];
if(r.location != NSNotFound)
{
//Delete the characters in that range
[s1 deleteCharactersInRange:r];
}
else
{
//break the loop if sub string not found as there is no more recurrence.
break;
}
}
return s1;
}
int main(int argc, char *argv[])
{
@autoreleasepool {
//initiating str1 here
NSMutableString* str1 = [[NSMutableString alloc] init];
[str1 appendString:@"fHsdaihati"];
NSLog(@"Loc B:%@ ",deleteWithSubstring(str1,@"ha"));
}
return 0;
}
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我来说两句