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字符串的拼接
NSString *string1 = @"iphone";
string1 = [string1 stringByAppendingString:@"123"];
NSLog(@"%@",string1);
字符串替换
string1 =[string1 stringByReplacingOccurrencesOfString:@"ip" withString:@"pi"];
NSLog(@"%@",string1);
字符串比较
NSComparisonResult result = [string1 compare:@"asdffggg"]
if (result == NSOrderedAscending) {
NSLog(@"nihao");
}
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原文地址:http://www.cnblogs.com/as5346/p/4471650.html