Objective-C从数组中的字符串中删除空格

NSString *stringWithSpaces = @"Hello World";
NSString *stringWithoutSpaces = [stringWithSpaces stringByReplacingOccurrencesOfString:@" " withString:@""];
NSLog(@"%@", stringWithoutSpaces); // 输出：HelloWorld

NSString *stringWithSpaces = @"Hello World";
NSCharacterSet *whitespaceSet = [NSCharacterSet whitespaceCharacterSet];
NSArray *components = [stringWithSpaces componentsSeparatedByCharactersInSet:whitespaceSet];
NSString *stringWithoutSpaces = [components componentsJoinedByString:@""];
NSLog(@"%@", stringWithoutSpaces); // 输出：HelloWorld

NSString *stringWithSpaces = @"Hello World";
NSRange range = NSMakeRange(0, stringWithSpaces.length);
NSString *stringWithoutSpaces = [stringWithSpaces stringByReplacingOccurrencesOfString:@" " withString:@"" options:0 range:range];
NSLog(@"%@", stringWithoutSpaces); // 输出：HelloWorld

NSArray *stringsWithSpaces = @[@"Hello World", @"Another String"];
NSMutableArray *stringsWithoutSpaces = [NSMutableArray arrayWithCapacity:stringsWithSpaces.count];
[stringsWithSpaces enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    NSString *stringWithSpaces = (NSString *)obj;
    NSString *stringWithoutSpaces = [stringWithSpaces stringByReplacingOccurrencesOfString:@" " withString:@""];
    [stringsWithoutSpaces addObject:stringWithoutSpaces];
}];
NSLog(@"%@", stringsWithoutSpaces); // 输出：(HelloWorld, AnotherString)