Question

我希望在打开UItextView时调用方法，并确定其标记。我使用的是这段代码：

-(IBAction)donecomment:(id)sender{

UISwipeGestureRecognizer *myLongPressRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(holdpress:)];
[textname addGestureRecognizer:myLongPressRecognizer];

textname.editable = NO;
textname.userInteractionEnabled = YES;

CGRect frame = textname.frame;
frame.size.height = textname.contentSize.height;
textname.frame = frame;

heightInteger = heightInteger + textname.contentSize.height + 6;

[textnameArray addObject:textname];

addComment.hidden = NO;
doneComment.hidden = YES;
cancelComment.hidden = YES;
}

-(void)holdpress:(id)sender{

UITextView *txtChoosen = (UITextView*) sender;

for (UITextView* txt in textnameArray) {
    if (txt.tag == txtChoosen.tag) {

        txt.layer.borderWidth = 5.0f;
        txt.layer.borderColor = [[UIColor whiteColor] CGColor];
    }else{

        txt.layer.borderWidth = 0.0f;
        txt.layer.borderColor = [[UIColor whiteColor] CGColor];
}}

...我收到此错误：原因：' - [PhotoViewController holdpress]：无法识别的选择器发送到实例0x22c1a000'

我想我可以使用以下方法解决它：

- (void)rightSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer

...但使用htis意味着删除发件人。我该怎么办？

Answer 1

错误是抱怨名为holdpress的方法。在您发布的代码中，您有一个名为holdpress:的方法。注意区别 - 方法有冒号，错误方法没有。

同样在您发布的代码中，您设置了手势识别器以使用holdpress:的选择器。这与您实际拥有的方法完全匹配。这是对的。

由于错误大约是holdpress而不是holdpress:，因此您必须使用其他代码尝试使用holdpress选择器而不是holdpress:。

发布的代码来自PhotoViewController？

在代码中搜索holdpress（不是holdpress:）的来电。

Answer 2

最终解决方案：

-(IBAction)donecomment:(id)sender{

UISwipeGestureRecognizer *myLongPressRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipe:)];
 //[myLongPressRecognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];
[textname addGestureRecognizer:myLongPressRecognizer];

textname.editable = NO;
textname.userInteractionEnabled = YES;

CGRect frame = textname.frame;
frame.size.height = textname.contentSize.height;
textname.frame = frame;

heightInteger = heightInteger + textname.contentSize.height + 6;

[textnameArray addObject:textname];

addComment.hidden = NO;
doneComment.hidden = YES;
cancelComment.hidden = YES;

}

- (void)leftSwipe:(UISwipeGestureRecognizer *)recognizer {

id sender;
UITextView *txtChoosen = (UITextView*) sender;

for (UITextView* txt in textnameArray) {
    if (txt.tag == txtChoosen.tag) {

        txt.layer.borderWidth = 5.0f;
        txt.layer.borderColor = [[UIColor whiteColor] CGColor];
    }else{

        txt.layer.borderWidth = 0.0f;
        txt.layer.borderColor = [[UIColor whiteColor] CGColor];
}}

UISwipeGestureRecognizer检测滑动对象

2 个答案: