NSString的八条实用技巧
有一篇文章写了： iOS开发之NSString的几条实用技巧 ， 今天这篇，我们讲讲NSString的八条实用技巧。大家可以收藏起来，方便开发随时可以复制粘贴。
0.首字母大写
代码：
//首字母大写 NSString *string = @"ligang"; NSLog(@"string: %@",[string capitalizedString]); 打印：
2015-07-16 23:06:11.652 iOSStrongDemo[10279:3062010] string: Ligang 1.分割字符串
代码：
//分割字符串 NSString *string = @"This is a iOSDevTip"; NSArray *array = [string componentsSeparatedByString:@"a"]; NSString *string1 = [array objectAtIndex:0]; NSString *string2 = [array objectAtIndex:1]; NSLog(@"string1:%@ string2:%@",string1,string2); 打印：
2015-07-16 22:40:39.559 iOSStrongDemo[10165:3055448] string1:This is string2: iOSDevTip 2.追加字符串
代码：
//追加字符串 NSMutableString *string = [[NSMutableString alloc] initWithString:@"I Love "]; [string appendString:@"China"]; NSLog(@"string:%@",string); 打印：
2015-07-16 22:42:32.305 iOSStrongDemo[10189:3056410] string:I Love China 3.插入字符串
代码：
//插入字符串 NSMutableString *string = [[NSMutableString alloc] initWithString:@"I China"]; [string insertString:@"Love " atIndex:2]; NSLog(@"string: %@",string); 打印：
2015-07-16 22:44:10.706 iOSStrongDemo[10206:3057014] string: I Love China 4.删除字符串
代码：
//删除字符串 NSMutableString *string = [[NSMutableString alloc] initWithString:@"I love China"]; [string deleteCharactersInRange:NSMakeRange(2, 4)]; NSLog(@"String1: %@",string); 打印：
2015-07-16 22:46:58.437 iOSStrongDemo[10219:3057749] String1: I China 5.判断是否包含前后缀
代码：
//判断是否包含前后缀 NSString *string = @"I love China"; BOOL isHasI = [string hasPrefix:@"I"]; BOOL isHasChina = [string hasSuffix:@"China"]; 6.替换字符串
代码：
//替换字符串 NSString *string = @"I love China"; NSString *replaceString = [string stringByReplacingOccurrencesOfString:@"love" withString:@"like"]; NSLog(@"replaceString: %@",replaceString); 打印：
2015-07-16 22:56:07.405 iOSStrongDemo[10236:3059503] replaceString: I like China 7.去除字符串首尾的空格和换行符
代码：
//去除字符串首尾的空格和换行符 NSString *string = @" I love China "; NSString *text = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSLog(@"text:%@",text); 打印：
2015-07-16 23:00:47.845 iOSStrongDemo[10265:3061013] text:I love China 代码已经更新，demo下载地址： iOSStrongDemo
正文到此结束
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