如何从另一个对象设置 UItextlabel 文本
我在 NSobject 中设置一个 NSString，我想在不同的视图中将值传递给 uitableviewcell UIlable ？我很想知道正确设置这个的代码是什么，因为我觉得我在做正确的事情，但它只是没有改变标签中的文本。
//inside tableview/forRowAtIndexPath
//load VehicleSearchObjects
VehicleSearchObject *vehicleSearchObject = [[VehicleSearchObject alloc] init];
if(indexPath.section == 0)
{
if(indexPath.row == 0)
{
UILabel *label1;
label1 = (UILabel *)[cell viewWithTag:1];
label1.text = @"Manufacture";
UILabel *label2;
label2 = (UILabel *)[cell viewWithTag:2];
label2.text = [vehicleSearchObject manufacturerString]; //this is where I try to set the text... but nothing is happening, am I doing it right or should I be doing something else?
I am setting an NSString inside an NSobject in which I want to pass the value over to uitableviewcell UIlable in a different view? I am woundering what the code would be to set this correctly as I feel like I am doing the right thing but its just not changing the text in the label..
//inside tableview/forRowAtIndexPath
//load VehicleSearchObjects
VehicleSearchObject *vehicleSearchObject = [[VehicleSearchObject alloc] init];
if(indexPath.section == 0)
{
if(indexPath.row == 0)
{
UILabel *label1;
label1 = (UILabel *)[cell viewWithTag:1];
label1.text = @"Manufacture";
UILabel *label2;
label2 = (UILabel *)[cell viewWithTag:2];
label2.text = [vehicleSearchObject manufacturerString]; //this is where I try to set the text... but nothing is happening, am I doing it right or should I be doing something else?
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如果更改
label1的文本有效，那么我会检查您尝试访问的标签是否确实属于标签2，如果为 true，则manufacturerString确实返回了任何东西。If changing
label1's text works, then I'd look into whether or not the label you're trying to access is indeed of tag2, and if true, ifmanufacturerStringis indeed returning anything.每次调用该方法时都会初始化
vehicleSearchObject。我希望manufacturerString不是nil。另外，如果您不分配任何内存，UILabel可能没有内存。尝试将其设为@property。您可以在调试器控制台中检查它是否有内存。编辑：声明
UILabel * label1并在界面或.h文件和中写入在您的实现或@property(nonatomic,retain) UILabel * label1;>@synthesize label1;.m文件中。在UIView初始化方法（如viewDidLoad:等）中分配/初始化标签。这会将内存分配给label1，其范围涵盖所有函数。现在，不要再写UILabel *label1;。只需根据您的要求继续设置文本即可。对于label2也是如此。You initialize
vehicleSearchObjectevery time the method is called. I hopemanufacturerStringis notnil. Also,UILabelmight not have memory if you do not allocate it any. Try making it a@property. You can check if it has memory in the debugger console.EDIT: Declare
UILabel * label1and write@property(nonatomic,retain) UILabel * label1;in your interface or.hfile and@synthesize label1;in your implementation or.mfile. Alloc/init the labels in yourUIViewinitializing methods likeviewDidLoad:etc. This allocates memory tolabel1with scope across all functions. Now, do not writeUILabel *label1;again. Just keep setting the text according to your requirements. Similarly forlabel2.您可能想尝试 [UILabel setText:(NSString)] 而不是 UILabel.text = (String)。
You may want to try [UILabel setText:(NSString)] instead of UILabel.text = (String).