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字符串替换
1.字符串的替换函数
- - (NSString )stringByReplacingOccurrencesOfString:(NSString )target withString:(NSString *)replacement;
- 用replacement替换target
NSString *str = @"http:**520it.com*img*ljn.gif"; NSString *newStr = [str stringByReplacingOccurrencesOfString:@"*" withString:@"/"]; NSLog(@"newStr = %@", newStr);输出结果: http://www.520it.com/img/ljn.gif
- - (NSString )stringByTrimmingCharactersInSet:(NSCharacterSet )set;
去除首尾
NSString *str = @" http://520it.com/img/ljn.gif "; NSString *newStr = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; NSLog(@"str =|%@|", str); NSLog(@"newStr =|%@|", newStr);输出结果:str =| http://520it.com/img/ljn.gif |newStr =|http://520it.com/img/ljn.gif|
NSString *str = @"***http://520it.com/img/ljn.gif***"; NSString *newStr = [str stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"*"]]; NSLog(@"str =|%@|", str); NSLog(@"newStr =|%@|", newStr);输出结果:str =|***http://520it.com/img/ljn.gif***|newStr =|http://520it.com/img/ljn.gif|
字符串替换
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