在NSString

Question

我正在使用NSString类来显示一个格式为'STRING'的字符串，空格应显示在字符串的开头和结尾

我的代码是

NSMutableString *MUT_STR = [NSMutableString stringWithString:@" TEST"];
    [MUT_STR insertString:@" " atIndex: MUT_STR.length];

我也试过以下代码

NSString *STR_test = @" TEST ";

目前我的输出就像 '测试'

由于

Answer 1

你可以通过多种方式做到这一点。

例如

// add the space in in front of string
NSString *finalString = [NSString stringWithFormat:@" %@",STR_test];
// calculate the string length and append the space in end of the string
NSString *result = [finalString stringByPaddingToLength:MAX(finalString.length + 1, STR_test.length)
                                      withString:@" " startingAtIndex:0];
NSLog(@"final Result:\'%@\'", result);

另一个简单的选择

// add space in start and end of the string

NSString *finalString = [NSString stringWithFormat:@" %@ ",STR_test];

Answer 2

嘿，我试着用你所做的，它在我的最后给出了完美的输出。检查附加的屏幕截图。

https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/user_findmeetingtimes

如果您仍有问题，可以使用以下代码：

    NSString *STR_test = @" TEST";
    NSString *result = [NSString stringWithFormat:@"%@ ",STR_test];
NSLog(@"%@",result);

这就是我的尝试：

NSString * STR_test = @“TEST”;     // NSLog（@“％@”，STR_test）;

NSString *result = [NSString stringWithFormat:@"%@ ",STR_test];
NSLog(@"%@",result);

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 300, 50)];
label.text = [NSString stringWithFormat:@"%@",result];
label.backgroundColor = [UIColor redColor];
[label sizeToFit];
[self.view addSubview:label];

<强>输出：

Answer 3

我试过这个，它对我有用

NSString * reqString = [NSString stringWithFormat：@“％@％@％@”，@“”，@“YourString”，@“”];     的NSLog（@ “％@”，reqString）;

传递字符串代替字符串。

Answer 4

<强>夫特

    let str = "Hello"
    var finalStr: String = " \(str)"
    let result = finalStr.padding(toLength: max((finalStr.characters.count) + 1, (str.characters.count)), withPad: " ", startingAt: 0)
    print("Result:\'\(result)\'")

Answer 5

尝试如下：

NSString *MUT_STR = @" TEST";
MUT_STR = [MUT_STR stringByAppendingString:@" "];
NSLog(@"%@",MUT_STR);

Answer 6

代码看起来很符合预期的结果。

案例1

NSMutableString *MUT_STR = [NSMutableString stringWithString:@" TEST"];
[MUT_STR insertString:@" " atIndex: MUT_STR.length];
NSLog(@"output : |%@|",MUT_STR);
self.lbl.text = MUT_STR;

With trailing and leading spaces

案例2

NSMutableString *MUT_STR = [NSMutableString stringWithString:@"TEST"];
[MUT_STR insertString:@" " atIndex: MUT_STR.length];
NSLog(@"output : |%@|",MUT_STR);
self.lbl.text = MUT_STR;

案例3

NSMutableString *MUT_STR = [NSMutableString stringWithString:@" TEST"];
//[MUT_STR insertString:@" " atIndex: MUT_STR.length];
NSLog(@"output : |%@|",MUT_STR);
self.lbl.text = MUT_STR;

案例4归因于文本

NSMutableString *MUT_STR = [NSMutableString stringWithString:@" TEST"];
[MUT_STR insertString:@" " atIndex: MUT_STR.length];
NSLog(@"output : |%@|",MUT_STR);
NSDictionary *attributes = [NSDictionary dictionaryWithObject:[UIColor blueColor] forKey:NSBackgroundColorAttributeName];

NSAttributedString *attStr = [[NSAttributedString alloc] initWithString:MUT_STR attributes:attributes];

//self.lbl.text = MUT_STR;
self.lbl.attributedText = attStr;

blue area is where there is text content

确保您没有修剪尾随空格或不在代码流中的任何位置替换空格