iOS add imageView to scrollView
enter image description hereWhen i add three imageViews to scrollView, and i setting scrollView contentSize is three times scrollView's width, even if it was appeared in scrolView,but imageView's width not equal to scrollview's. I ensured that already setting they width equeal to each otehr. If who know that how to resolve this issue,please help me, thinks.
- (void)addScrollViewImage {
for (NSInteger index = 0; index < IMAGE_NUM; index++) {
UIImageView *imageView = [[UIImageView alloc] init];
CGFloat imageViewX = index * (self.scrollView.frame.size.width);
imageView.frame = CGRectMake(imageViewX, 0, self.scrollView.frame.size.width , self.scrollView.frame.size.height);
imageView.image = [UIImage imageNamed:@"搜索图片"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * IMAGE_NUM, self.scrollView.frame.size.height);
}
ios uiscrollview
asked Nov 9 '16 at 8:52
nickpannickpan
237
add a comment |
enter image description hereWhen i add three imageViews to scrollView, and i setting scrollView contentSize is three times scrollView's width, even if it was appeared in scrolView,but imageView's width not equal to scrollview's. I ensured that already setting they width equeal to each otehr. If who know that how to resolve this issue,please help me, thinks.
- (void)addScrollViewImage {
for (NSInteger index = 0; index < IMAGE_NUM; index++) {
UIImageView *imageView = [[UIImageView alloc] init];
CGFloat imageViewX = index * (self.scrollView.frame.size.width);
imageView.frame = CGRectMake(imageViewX, 0, self.scrollView.frame.size.width , self.scrollView.frame.size.height);
imageView.image = [UIImage imageNamed:@"搜索图片"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * IMAGE_NUM, self.scrollView.frame.size.height);
}
ios uiscrollview
asked Nov 9 '16 at 8:52
nickpannickpan
237
isautolayoutenabled in your project ?
– CodeChanger
Nov 9 '16 at 8:55
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28
add a comment |
enter image description hereWhen i add three imageViews to scrollView, and i setting scrollView contentSize is three times scrollView's width, even if it was appeared in scrolView,but imageView's width not equal to scrollview's. I ensured that already setting they width equeal to each otehr. If who know that how to resolve this issue,please help me, thinks.
- (void)addScrollViewImage {
for (NSInteger index = 0; index < IMAGE_NUM; index++) {
UIImageView *imageView = [[UIImageView alloc] init];
CGFloat imageViewX = index * (self.scrollView.frame.size.width);
imageView.frame = CGRectMake(imageViewX, 0, self.scrollView.frame.size.width , self.scrollView.frame.size.height);
imageView.image = [UIImage imageNamed:@"搜索图片"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * IMAGE_NUM, self.scrollView.frame.size.height);
}
ios uiscrollview
asked Nov 9 '16 at 8:52
nickpannickpan
237
enter image description hereWhen i add three imageViews to scrollView, and i setting scrollView contentSize is three times scrollView's width, even if it was appeared in scrolView,but imageView's width not equal to scrollview's. I ensured that already setting they width equeal to each otehr. If who know that how to resolve this issue,please help me, thinks.
- (void)addScrollViewImage {
for (NSInteger index = 0; index < IMAGE_NUM; index++) {
UIImageView *imageView = [[UIImageView alloc] init];
CGFloat imageViewX = index * (self.scrollView.frame.size.width);
imageView.frame = CGRectMake(imageViewX, 0, self.scrollView.frame.size.width , self.scrollView.frame.size.height);
imageView.image = [UIImage imageNamed:@"搜索图片"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * IMAGE_NUM, self.scrollView.frame.size.height);
}
ios uiscrollview
ios uiscrollview
asked Nov 9 '16 at 8:52
nickpannickpan
237
asked Nov 9 '16 at 8:52
nickpannickpan
237
edited Nov 11 '16 at 9:18
nickpan
asked Nov 9 '16 at 8:52
nickpannickpan
237
asked Nov 9 '16 at 8:52
nickpannickpan
237
asked Nov 9 '16 at 8:52
nickpannickpan
237
237
isautolayoutenabled in your project ?
– CodeChanger
Nov 9 '16 at 8:55
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28
add a comment |
isautolayoutenabled in your project ?
– CodeChanger
Nov 9 '16 at 8:55
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28
is
autolayout enabled in your project ?– CodeChanger
Nov 9 '16 at 8:55
is
autolayout enabled in your project ?– CodeChanger
Nov 9 '16 at 8:55
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28
add a comment |
2 Answers
2
active
oldest
votes
you need to change imageview content mode
imageView.contentMode = UIViewContentModeScaleAspectFill;
With
imageView.contentMode = UIViewContentModeScaleToFill;
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
add a comment |
This is because when your viewController is loaded, view / scrollView frame is still unknown.
You need to override viewDidLayoutSubviews() and setup children frames and content size there.
Important note: iOS is adding EXTRA UIImageView's for scroll indicators. That's why you can't use scrollView.subviews.count inside viewDidLayoutSubviews(), but you can use IMAGE_NUM though.
Some Swift code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let scrollSize = scrollView.bounds.size
var frame = scrollView.bounds
// Wrong: for i in 0 ..< scrollView.subviews.count
for i in 0 ..< IMAGE_NUM {
let view = scrollView.subviews[i]
view.frame = frame
frame.origin.x += scrollSize.width
}
scrollView.contentSize = CGSize(width: frame.origin.x, height: scrollSize.height)
}
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
you need to change imageview content mode
imageView.contentMode = UIViewContentModeScaleAspectFill;
With
imageView.contentMode = UIViewContentModeScaleToFill;
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
add a comment |
you need to change imageview content mode
imageView.contentMode = UIViewContentModeScaleAspectFill;
With
imageView.contentMode = UIViewContentModeScaleToFill;
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
add a comment |
you need to change imageview content mode
imageView.contentMode = UIViewContentModeScaleAspectFill;
With
imageView.contentMode = UIViewContentModeScaleToFill;
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
you need to change imageview content mode
imageView.contentMode = UIViewContentModeScaleAspectFill;
With
imageView.contentMode = UIViewContentModeScaleToFill;
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
answered Nov 9 '16 at 10:51
KKRocksKKRocks
6,9861969
6,9861969
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
add a comment |
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
But i changed imageView's contentMode = UIViewContentModeScaleToFill, this problem exists too. I don't know that i have already setted it's correct orginX ,but there is a gap between imageView and scrollView.
– nickpan
Nov 11 '16 at 9:00
add a comment |
This is because when your viewController is loaded, view / scrollView frame is still unknown.
You need to override viewDidLayoutSubviews() and setup children frames and content size there.
Important note: iOS is adding EXTRA UIImageView's for scroll indicators. That's why you can't use scrollView.subviews.count inside viewDidLayoutSubviews(), but you can use IMAGE_NUM though.
Some Swift code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let scrollSize = scrollView.bounds.size
var frame = scrollView.bounds
// Wrong: for i in 0 ..< scrollView.subviews.count
for i in 0 ..< IMAGE_NUM {
let view = scrollView.subviews[i]
view.frame = frame
frame.origin.x += scrollSize.width
}
scrollView.contentSize = CGSize(width: frame.origin.x, height: scrollSize.height)
}
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
add a comment |
This is because when your viewController is loaded, view / scrollView frame is still unknown.
You need to override viewDidLayoutSubviews() and setup children frames and content size there.
Important note: iOS is adding EXTRA UIImageView's for scroll indicators. That's why you can't use scrollView.subviews.count inside viewDidLayoutSubviews(), but you can use IMAGE_NUM though.
Some Swift code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let scrollSize = scrollView.bounds.size
var frame = scrollView.bounds
// Wrong: for i in 0 ..< scrollView.subviews.count
for i in 0 ..< IMAGE_NUM {
let view = scrollView.subviews[i]
view.frame = frame
frame.origin.x += scrollSize.width
}
scrollView.contentSize = CGSize(width: frame.origin.x, height: scrollSize.height)
}
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
add a comment |
This is because when your viewController is loaded, view / scrollView frame is still unknown.
You need to override viewDidLayoutSubviews() and setup children frames and content size there.
Important note: iOS is adding EXTRA UIImageView's for scroll indicators. That's why you can't use scrollView.subviews.count inside viewDidLayoutSubviews(), but you can use IMAGE_NUM though.
Some Swift code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let scrollSize = scrollView.bounds.size
var frame = scrollView.bounds
// Wrong: for i in 0 ..< scrollView.subviews.count
for i in 0 ..< IMAGE_NUM {
let view = scrollView.subviews[i]
view.frame = frame
frame.origin.x += scrollSize.width
}
scrollView.contentSize = CGSize(width: frame.origin.x, height: scrollSize.height)
}
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
This is because when your viewController is loaded, view / scrollView frame is still unknown.
You need to override viewDidLayoutSubviews() and setup children frames and content size there.
Important note: iOS is adding EXTRA UIImageView's for scroll indicators. That's why you can't use scrollView.subviews.count inside viewDidLayoutSubviews(), but you can use IMAGE_NUM though.
Some Swift code:
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let scrollSize = scrollView.bounds.size
var frame = scrollView.bounds
// Wrong: for i in 0 ..< scrollView.subviews.count
for i in 0 ..< IMAGE_NUM {
let view = scrollView.subviews[i]
view.frame = frame
frame.origin.x += scrollSize.width
}
scrollView.contentSize = CGSize(width: frame.origin.x, height: scrollSize.height)
}
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
edited Nov 14 '18 at 23:47
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
answered Nov 14 '18 at 23:36
BorzhBorzh
3,12813047
3,12813047
add a comment |
add a comment |
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is
autolayoutenabled in your project ?– CodeChanger
Nov 9 '16 at 8:55
Are you using constraints?
– User511
Nov 9 '16 at 9:07
Where "addScrollViewImage" method get called? In viewDidLoad()? Try to call in viewDidApprear(), where you will get the actual scrollview width.
– miOS
Nov 9 '16 at 9:28
yes ,i used Autolayout in my project. But only setting scrollview's constraints,imageview by addScrollViewImage: this function add.
– nickpan
Nov 9 '16 at 9:28