XCode重命名插座标签方向

来自我创建的字符串（使用xcode 4.5.2）

当然还有：

@property (strong, nonatomic) IBOutlet UILabel *labelField_x;
@property (strong, nonatomic) IBOutlet UILabel *labelField_y;
@property (strong, nonatomic) IBOutlet UILabel *labelField_z;

我希望能够在iAction中，通过从数组中选择正确的键，从字符串中选择要使用的标签。而不是做if或BOOL语句，重复我自己。例如，我有：

- (IBAction)buttonPressed:(UIButton *)sender;
{
    if (is_x){

        NSString *digit = sender.currentTitle;
            if (!pressedDecimal){
                labelField_x.text = [labelField_x.text stringByAppendingString:digit];
            }else if (count <= 1){
                labelField_x.text = [labelField_x.text stringByAppendingString:digit];
            }
                                      .
                                      .
                                      .
    }
    else if (is_y){

        NSString *digit = sender.currentTitle;     
            if (!pressedDecimal){
                labelField_y.text = [labelField_y.text stringByAppendingString:digit];
            }else if (count <= 1){
                labelField_y.text = [labelField_y.text stringByAppendingString:digit];
            }
                                      .
                                      .
                                      .

    }
    else if (is_z){

        NSString *digit = sender.currentTitle;
            if (!pressedDecimal){
                labelField_z.text = [labelField_z.text stringByAppendingString:digit];
            }else if (count <= 1){
                labelField_z.text = [labelField_z.text stringByAppendingString:digit];
            }
                                      .
                                      .
                                      .
    }
}

---

谢谢。

我不完全确定你在干什么，但如果你想省去一些打字的时间，为什么不这样做：

// assign the label you want to use to a local variable

UILabel *selectedLabel;
selectedLabel = nil;
if (is_x) {
    selectedLabel = labelField_x;
} else if (is_y) {
    selectedLabel = labelField_y;
} else if (is_z) {
    selectedLabel = labelField_z;
}

// now work with selectedLabel so you don't have to repeat yourself

if (!pressedDecimal){
    selectedLabel.text = ...

或者，您甚至可以将IBOutlet属性中的标签直接粘贴到字典中，以便快速获得任何给定字符（字符串）的正确标签：

---

谢谢你，我很抱歉没有告诉你我到底在做什么，我只是想让我的代码的某些部分不那么重复。

labelField_@"%@".text,[myList 0]  = [labelField_@"%@".text,[myList 0] stringByAppendingString:digit];

// assign the label you want to use to a local variable

UILabel *selectedLabel;
selectedLabel = nil;
if (is_x) {
    selectedLabel = labelField_x;
} else if (is_y) {
    selectedLabel = labelField_y;
} else if (is_z) {
    selectedLabel = labelField_z;
}

// now work with selectedLabel so you don't have to repeat yourself

if (!pressedDecimal){
    selectedLabel.text = ...

// create a lookup dictionary (once, e.g. in awakeFromNib)

NSDictionary *labelForCharacter;
labelForCharacter = @{
    @"x" : labelField_x,
    @"y" : labelField_y,
    @"z" : labelField_z
};

 // get the label for "z"

UILabel *selectedLabel;
selectedLabel = labelForCharacter[@"z"];