使用NSAttributedString更改字符串颜色？ [英] Change string color with NSAttributedString?

问题描述

我有一个调查滑块，根据滑块的值显示以下字符串：很差，坏，好，好，很好。

I have a slider for a survey that display the following strings based on the value of the slider: "Very Bad, Bad, Okay, Good, Very Good".

以下是滑块的代码：

- (IBAction) sliderValueChanged:(UISlider *)sender {
    scanLabel.text = [NSString stringWithFormat:@" %.f", [sender value]];
    NSArray *texts=[NSArray arrayWithObjects:@"Very Bad", @"Bad", @"Okay", @"Good", @"Very Good", @"Very Good", nil];
    NSInteger sliderValue=[sender value]; //make the slider value in given range integer one.
    self.scanLabel.text=[texts objectAtIndex:sliderValue];
}

我要非常差为红色，差 ，Okay为黄色，Good和Very Good为绿色。

I want "Very Bad" to be red, "Bad" to be orange, "Okay" to be yellow, "Good" and "Very Good" to be green.

我不明白如何使用 NSAttributedString 来完成这项工作。

I don't understand how to use NSAttributedString to get this done.

推荐答案

不需要使用 NSAttributedString 。所有你需要的是一个简单的标签与正确的 textColor 。此外，这个简单的解决方案将适用于所有版本的iOS，而不仅仅是iOS 6.

There is no need for using NSAttributedString. All you need is a simple label with the proper textColor. Plus this simple solution will work with all versions of iOS, not just iOS 6.

但如果你不必要地希望使用 NSAttributedString ，你可以这样做：

But if you needlessly wish to use NSAttributedString, you can do something like this:

UIColor *color = [UIColor redColor]; // select needed color
NSString *string = ... // the string to colorize
NSDictionary *attrs = @{ NSForegroundColorAttributeName : color };
NSAttributedString *attrStr = [[NSAttributedString alloc] initWithString:string attributes:attrs];
self.scanLabel.attributedText = attrStr;

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