-
创建PWTimerButton 继承与UIButton
-
添加成员方法和属性
-
头文件如下：
@interface PWTimerButton : UIButton
{
NSInteger _timerInterval;
NSTimer *_timer;
NSString *_formatString;
}
- (void)setFormatString:(NSString *)formatString;
- (void)startTimer:(NSInteger)interval;
- (void)stopTimer;
4.源文件如下：
- (void)startTimer:(NSInteger)interval
{
if (_timer) {
[_timer invalidate];
_timer = nil;
}
if (interval > 0) {
_timerInterval = interval;
self.enabled = NO;
[self updateButtonState];
_timer = [NSTimer scheduledTimerWithTimeInterval:1
target:self
selector:@selector(timeOut:)
userInfo:nil
repeats:YES];
}
}
- (void)stopTimer
{
if (_timer) {
[_timer invalidate];
_timer = nil;
_timerInterval = 0;
}
[self updateButtonState];
}
- (void)timeOut:(NSTimer *)timer
{
_timerInterval--;
if (_timerInterval > 0) {
}
else {
[self stopTimer];
}
[self updateButtonState];
}
- (void)setFormatString:(NSString *)formatString
{
_formatString = formatString;
}
- (void)updateButtonState
{
if (_timerInterval > 0) {
[self setTitle:[NSString stringWithFormat:@"%d", _timerInterval] forState:UIControlStateDisabled];
}
else {
[self setTitle:@"验证" forState:UIControlStateNormal];
self.enabled = YES;
}
}
标记***的为重点知识，设置按钮的什么状态就要再什么状态下更改按钮的文字，颜色或者背景图片等。
调了n长时间终于调试出来了，哎，自己粗心大意了。。。
