用objective-c纯代码编写一个右上角倒计时跳转的按钮
时间: 2024-03-07 22:47:30 浏览: 27
好的,根据您的要求,我来为您提供Objective-C纯代码编写右上角倒计时跳转按钮的实现方法。
首先,在您的ViewController中创建一个计时器,代码如下:
```
@interface ViewController ()
@property (nonatomic, strong) NSTimer *timer;
@property (nonatomic, assign) NSInteger timeCount;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.timeCount = 60; // 设置倒计时总时间
[self setupRightBarButton];
[self startTimer];
}
- (void)setupRightBarButton {
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
[rightButton setTitle:@"60s" forState:UIControlStateNormal];
[rightButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[rightButton addTarget:self action:@selector(rightBarButtonClicked) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithCustomView:rightButton];
self.navigationItem.rightBarButtonItem = rightItem;
}
- (void)rightBarButtonClicked {
// 跳转到其他页面
}
- (void)startTimer {
self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerCountdown) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
}
- (void)timerCountdown {
self.timeCount--;
if (self.timeCount <= 0) {
[self.timer invalidate];
self.timer = nil;
self.navigationItem.rightBarButtonItem.enabled = YES;
self.timeCount = 60;
UIButton *button = (UIButton *)self.navigationItem.rightBarButtonItem.customView;
[button setTitle:@"60s" forState:UIControlStateNormal];
} else {
UIButton *button = (UIButton *)self.navigationItem.rightBarButtonItem.customView;
[button setTitle:[NSString stringWithFormat:@"%lds", (long)self.timeCount] forState:UIControlStateNormal];
}
}
@end
```
在这段代码中,我们创建了一个计时器来进行倒计时。在 `setupRightBarButton` 方法中,我们创建了一个 `UIButton` 作为 `UIBarButtonItem` 的 `customView`,并设置了它的标题为倒计时的时间。在 `startTimer` 方法中,我们启动了计时器,并设置了它的时间间隔为1秒。在 `timerCountdown` 方法中,我们对时间进行了倒计时,并更新了按钮的标题。当时间到达0时,我们停止了计时器,并将按钮的标题设置为60秒。
当用户点击右上角的按钮时,会跳转到其他页面,您可以在 `rightBarButtonClicked` 方法中进行相应的处理。
希望这段代码能够帮助到您!