NSString 往首尾空格
NSString 去首尾空格
函数原型
NSString* str = @" hello world ! "; str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; NSLog(@"[%@]", str);
函数原型
- (NSString *)stringByTrimmingCharactersInSet:(NSCharacterSet *)set