NSString * motherstr = @"w is w is w";
NSString * sonstr = @"w";
NSRange range = [motherstr rangeOfString:sonstr];
while(range.location != NSNotFound)
{
NSLog(@"start = %@",NSStringFromRange(range));
NSRange temp = NSMakeRange((range.location + range.length), (motherstr.length-(range.location+range.length)));
range =[motherstr rangeOfString:sonstr options:NSBackwardsSearch range:temp];
}
查找的时候只找到了开头和结尾中的w,中间的包含的子串字符并没有找到，想了很久也没想出来为什么，求大神告知。
NSString * motherstr = @"a is a , so a not equal b";
NSString * sonstr = @"a";
NSRange range = [motherstr rangeOfString:sonstr options:NSBackwardsSearch range:NSMakeRange(0, motherstr.length)];
//循环检索
while(range.location != NSNotFound)
{
NSLog(@"start = %@",NSStringFromRange(range));
NSUInteger start = 0;
NSUInteger end = range.location;
NSRange temp = NSMakeRange(start,end);
range =[motherstr rangeOfString:sonstr options:NSBackwardsSearch range:temp];
}
总算解决了，写的不咋滴，希望大家赐教...
应该是你的range定义的不对
range由temp来提供，后面我调试的时候，观察了temp的范围，那个检索范围并没有问题。不知道为什么。
NSString *string1 = @"This is a string";
NSString *string2 = @"string";
NSRange range = [string1 rangeOfString:string2];
int location = range.location;
int leight = range.length;
NSString *astring = [[NSString alloc] initWithString:[NSString stringWithFormat:@"Location:%i,Leight:%i",location,leight]];
NSLog(@"astring:%@",astring);
[astring release];
微信扫一扫
//字符串查找
void Find(){
NSString *str=@"123ABC123Acbc";
NSLog(@"%i",[str hasPrefix:@"1123"]);//是否匹配指定的字符串开头
NSLog(@"%i",[str hasSuffix:@"cbc1"]);//是否匹配指定的字符串结尾
NSRange range=[str rangeOfString:@"123"];//指定的字符串从左往右匹配（系统默认）。
NSLog(@"%@",NSStringFromRange(range));
//指定的字符串从右往左匹配
NSRange range1=[str rangeOfString:@"123" options:NSBackwardsSearch];
NSLog(@"%@",NSStringFromRange(range1));
}
int main(int argc, const char * argv[])
{
@autoreleasepool {
Find();
}
return 0;
}
你后面的那个range是从后往前搜索么？
我object c 也不是很熟