如何检查NSString是否包含'%'？

Question

我想问一个关于目标C的问题.NSString*是否包含一些函数来检查NSString*在UITextField.text中是否包含一些字符串？例如

NSString *checkString = @"abcd%"

if(checkString contains '%') // I want this function
   return YES;
else
   return NO;

Answer 1

if([checkString rangeOfString:@"%"].location != NSNotFound)
    // hooray!

Answer 2

你可以用- (NSRange)rangeOfString:(NSString *)aString.代码看起来像:

NSRange range = [UITextField.text rangeOfString:@"!"];

if (range.length > 0){
  NSLog(@"String contains '!'");
}
else {
  NSLog(@"No '!' found in string");
}