问题描述
我正在尝试这个，但是当我按下它时它不会改变，它只显示文本.也试过 if else 函数，但没有结果.
Im trying this, but when i press it it dont changes, it only displays text.Also tried if else functions, but with no results.
.h
IBOutlet UIButton *poga1;
@property (nonatomic, retain) UIButton *poga1;
.m
@synthesize poga1;
- (void)viewDidLoad
{
[super viewDidLoad];
[poga1 setTitle:@"My Title" forState:UIControlStateNormal];
[poga1 setTitle:@"My Selected Title" forState:UIControlStateSelected];
}
推荐答案
试试这个:如果你通过故事板(gui界面)添加了一个标题，然后删除它.
Try this: If you added a title through the storyboard (the gui interface) then delete it.
.h//创建一个IBOutlet动作.如何?右键单击该按钮并将其拖到 .h 文件中.出现弹出窗口，您需要单击下拉菜单并将其切换为操作//应该是这样的
.h//create an IBOutlet action. How? You right-click the button and drag it to the .h file. A pop up happens and you need to click the drop down and switch it to action//should be something like
- (IBAction)yourButton:(id)sender;
.m
//there will be a new function in your .m which is your button action function.
@synthesize poga1;
- (void)viewDidLoad
{
[super viewDidLoad];
[poga1 setTitle:@"My Title" forState:UIControlStateNormal];
[poga1 setTitle:@"My Selected Title" forState:UIControlStateSelected];
}
- (IBAction)Start:(id)sender
{
/* 如果您希望每次按下时都更改文本，那么您需要一个全局计数器，每次按下按钮时都会增加该计数器.那么您将有一个 if 语句，说明如果计数器等于 1(按一次)，则将标题设置为 hello，如果计数器等于 7(按 7 次)，则将标题设置为再见.*/
/* if you want this to change the text each time it's pressed then, you need a global counter that your increment each time the button is pressed. then you will have a if statement saying if the counter is equal to 1 (pressed once) then set title to hello, if the counter is equal to 7 (pressed 7 times) set title to goodbye. */
[sender setTitle:@"whatever" forState:UIControlStateNormal];
}
这篇关于每次按下按钮都会更改标题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！