检查字符串中是否有内容

Question

我想检查字符串中是否有内容。 就像那样：

stringByReplacingOccurrencesOfString:@"h" withString:@"a"

但我想检查字符串中是否有“h”。

Answer 1

你去：

NSString *theString = @"just any string that you want";
NSRange match;
match = [theString rangeOfString: @"you"];
if (match.location == NSNotFound)
          NSLog (@"Sorry, not found.");
else
          NSLog (@"Match found at index %i", match.location);

享受。

Answer 2

考虑[NSString rangeOfString: @"h"]，如果字符串中存在“h”字符，则该方法返回的NSRange将有效。

即

NSRange rangeOfTheCharacterIWant = [myString rangeOfString: @"h"];
if(rangeOfTheCharacterIWant.location != NSNotFound)
{
    NSLog( @"h exists!");
} else {
    NSLog( @"h does not exist");
}