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iphone - 以编程方式使 uitextview 滚动

转载 作者:行者123 更新时间:2023-12-03 18:42:29 24 4
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我想让我的 uitextview 在应用程序启动时自动滚动。谁能帮我提供详细的代码吗?我是 iPhone SDK 新手。

最佳答案

.h文件

@interface Credits : UIViewController 
{
NSTimer *scrollingTimer;

IBOutlet UITextView *textView;


}
@property (nonatomic , retain) IBOutlet UITextView *textView;

- (IBAction) buttonClicked ;

- (void) autoscrollTimerFired;

@end

.m 文件

- (void) viewDidLoad
{
// it prints the initial position of text view
NSLog(@"%f %f",textView.contentSize.width , textView.contentSize.height);

if (scrollingTimer == nil)
{
// A timer that updates the content off set after some time so it can scroll
// you can change time interval according to your need (0.06)
// autoscrollTimerFired is the method that will be called after specified time interval. This method will change the content off set of text view
scrollingTimer = [NSTimer scheduledTimerWithTimeInterval:(0.06)
target:self selector:@selector(autoscrollTimerFired) userInfo:nil repeats:YES];
}
}

- (void) autoscrollTimerFired
{
CGPoint scrollPoint = self.textView.contentOffset; // initial and after update
NSLog(@"%.2f %.2f",scrollPoint.x,scrollPoint.y);
if (scrollPoint.y == 583) // to stop at specific position
{
[scrollingTimer invalidate];
scrollingTimer = nil;
}
scrollPoint = CGPointMake(scrollPoint.x, scrollPoint.y + 1); // makes scroll
[self.textView setContentOffset:scrollPoint animated:NO];
NSLog(@"%f %f",textView.contentSize.width , textView.contentSize.height);

}

希望对你有帮助......

关于iphone - 以编程方式使 uitextview 滚动,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7266766/

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