字符串相加 stringByAppendingString

//字符串相加 stringByAppendingString NSString *str1 = @"str1"; NSString *str2 = @"str2"; NSString *str3 = [str1 stringByAppendingString:str2]; NSLog(str3);

判斷一個NSString是否為空

NSString *str1; if([str1 length] == 0) {NSLog(@"is empty string"); } else { NSLog(@"is not empty string "); }
字符串格式化 stringWithFormat

NSString *str1 = @"/Library/"; NSString *str2 = @"test"; int i=1; NSString *str3 = [NSString stringWithFormat:@"%@/%@%d",str1,str2,i]; NSLog(str3);

字符串比較 isEqualToString, 區分大小寫

NSString *str1 = @"test string"; NSString *str2 = @"test string"; BOOL result = [str1 isEqualToString:str2]; NSLog(@"result:%d",result); if(result) {NSLog(@"Equal"); } else {NSLog(@"Not equal"); }

字符串比較 caseInsensitiveCompare, 不區分大小寫

NSString *str1 = @"test string"; NSString *str2 = @"test strinG"; bool result = [str1 caseInsensitiveCompare:str2] == NSOrderedSame; NSLog(@"result:%d",result); if(result) {NSLog(@"Equal"); } else {NSLog(@"Not equal"); }字符串替換 stringByReplacingOccurrencesOfString

NSString *str1=@"http://www.baidu.com/set.rar"; NSString *str2=[str1 stringByReplacingOccurrencesOfString:@"set.rar" withString:@"set1.rar"]; NSLog(@"str1:%@",str1); NSLog(@"str2:%@",str2);

待續...

總結

以上是生活随笔為你收集整理的Objective-C NSString字符串操作总结的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。