Question

我有一个数组，如何换行？

NSArray *stringsArray2 = @[
                      [NSString stringWithFormat:@"Distance is %f km",betweenDistance/1000],
                      [NSString stringWithFormat:@"Distance is %f km",betweenDistance3/1000],
                      [NSString stringWithFormat:@"Distance is %f km",betweenDistance4/1000]
                              ];
    NSString * combinedStuff = [stringsArray2 componentsJoinedByString:@"\n"];
    UILabel *label3 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 200)];
    label3.text = combinedStuff;
    [self.view addSubview:label3];

Answer 1

我认为您可以创建字符串链接：

str= [NSString stringWithFormat:@"Distance is %f km \n Distance is %f km \nDistance is %f km ",betweenDistance/1000,betweenDistance3/1000,betweenDistance4/1000];

现在使用str字符串在Label上打印。

Answer 2

替换这段代码：

NSString * combinedStuff = [stringsArray2 componentsJoinedByString:@"/n"];

有了这个：

NSString * combinedStuff = [stringsArray2 componentsJoinedByString:@"\n"];

Answer 3

首先，你使用了错误的转义序列字符。

试试此代码

NSArray *stringsArray2 = @[
                               [NSString stringWithFormat:@"Distance is %f km",100.0],
                               [NSString stringWithFormat:@"Distance is %f km",200.0],
                               [NSString stringWithFormat:@"Distance is %f km",300.0]
                               ];
    NSString * combinedStuff = [stringsArray2 componentsJoinedByString:@"\n"];
    NSLog(@"combinedStuff %@",combinedStuff);
    UILabel *label3 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 500, 300)];
    label3.text = combinedStuff;
    label3.numberOfLines = 0;
    label3.lineBreakMode = NSLineBreakByWordWrapping;
    [self.view addSubview:label3];

Answer 4

NSString不会将

“\ n”解析为换行符，您必须使用“\\ n”来创建换行符。

Answer 5

将numberOfLines设置为0以允许任意数量的行。

label.numberOfLines = 0;

使用sizeWithFont:更新标签框以匹配文字大小。如果不这样做，您的文本将垂直居中或切断。

CGSize labelSize = [label.text sizeWithAttributes:@{NSFontAttributeName:label.font}];
label.frame = CGRectMake(
label.frame.origin.x, label.frame.origin.y, 
label.frame.size.width, labelSize.height);

NSArray中的换行符

5 个答案: