1、判断字符串是否相等使用isEqualToString:
NSString *astring01 =@"This is a String!";
NSString *astring02 =@"This is a String!";
BOOL result = [astring01 isEqualToString:astring02];
NSLog(@"result:%d",result);
2、判断字符不相等:
NSString *astring01 =@"This is a String!";
NSString *astring02 =@"This is a String!";
if ([astring01 compare: astring02]!=NSOrderedSame )
{
NSLog(@"not equal");
}
3、判断字符串是否为空。
NSString *urlString = [urlInput stringValue];
if (!urlString) {
NSLog( @”NO INPUT.” );
} else {
if ([urlString length] ==0 ) {
NSLog( @”NO INPUT.” );
} else {
}
}
}
本文转自麒麟博客园博客,原文链接:http://www.cnblogs.com/zhuqil/archive/2011/08/03/2126524.html,如需转载请自行联系原作者