iPhone：如何检查字符串中是否存在子字符串？

Question

我有一些字符串名称，我想比较该字符串是否包含子字符串，例如“ _thumb.png”。

Answer 1

[string rangeOfString:string1].location!=NSNotFound

rangeOfString：文档。

Answer 2

You can try this:

NSString *originalString;
NSString *compareString;

Let your string be stored in originalString and the substring that you want to compare is stored in compareString .

if ([originalString rangeOfString:compareString].location==NSNotFound)
{       
    NSLog(@"Substring Not Found");  
}
else
{
    NSLog(@"Substring Found Successfully");
}

Answer 3

ssteinberg's answer looks pretty good, but there is also this:

NSRange textRange;
textRange =[string rangeOfString:substring];

if(textRange.location != NSNotFound)
{

//Does contain the substring
}

which I found here .

Answer 4

NSString *string = @"hello bla bla";
if ([string rangeOfString:@"bla"].location == NSNotFound)
{
    NSLog(@"string does not contain bla");
}  
else 
{
    NSLog(@"string contains bla!");
}

Answer 5

In ios 8 or OS X 10.10 we can use.

if(![textLine containsString:@"abc"])
{
     [usableLines addObject:textLine];
}

Answer 6

u can go through this

http://objcolumnist.com/2009/04/12/does-a-nsstring-contain-a-substring/