ios 字符串的插入删除查找与替换，删除空格

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NSString *str1 = @"This is a example.";  
NSMutableString *mstr = [[NSMutableString alloc] init]; //创建可变字符串  
NSRange substr; //子字符串的范围
mstr = [NSMutableString stringWithString:str1];  
//插入字符  
[mstr insertString:@"very easy " atIndex:10];  
//删除一些字符  
[mstr deleteCharactersInRange:NSMakeRange(10,5)];  
//查找并删除  
substr = [mstr rangeOfString:@"easy "];  
if (substr.location != NSNotFound) {
[mstr deleteCharactersInRange:substr]; 
  }  
//重新设置字符串  
[mstr setString:@"This is string A"];  
//替换字符串  
[mstr replaceCharactersInRange:NSMakeRange(15, 1) withString:@"BBB"];  
//查找第一个并替换  
NSString *search = @"This is";  
NSString *replace = @"An example of";  
substr = [mstr rangeOfString:search];  
if (substr.location != NSNotFound) {
[mstr replaceCharactersInRange:substr withString:replace]; 
  }  
//查找全部匹配的，并替换  
search = @"a";  
replace = @"X";  
substr = [mstr rangeOfString:search];  
while (substr.location != NSNotFound) {
[mstr replaceCharactersInRange:substr withString:replace];  
substr = [mstr rangeOfString:search];  
}  

//删除空格

[string stringByReplacingOccurrencesOfString:@" " withString:@""]

ios 字符串的插入删除查找与替换，删除空格

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原文地址：http://www.cnblogs.com/huangzs/p/4458815.html