[英]Use of undeclared identifier 'arc4random' after Xcode 4.6 update
[英]Use UIScrollView With Xcode 4.6
我正在使用Storyboard,我創建了一個UIScrollView及其插座:
.h
@interface ViewController : UIViewController <UIScrollViewDelegate>
@property (strong, nonatomic) IBOutlet UIScrollView *scrollView;
@end
.m
:我合成了scrollView,並且在viewDidLoad上我有
- (void)viewDidLoad {
[super viewDidLoad];
self.scrollView.delegate = self;
// Init an array with 3 images
subviewArray = [[NSMutableArray alloc] initWithObjects:@"image1.jpg", @"image2.jpg", @"image3.jpg", nil];
for (int i = 0; i < [subviewArray count]; i++) {
//We'll create a View object in every 'page' of our scrollView.
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
UIImageView *imageView = [[UIImageView alloc] initWithFrame:frame];
imageView.image = [UIImage imageNamed:[subviewArray objectAtIndex:i]];
[self.scrollView addSubview:imageView];
}
NSLog(@"%f", self.scrollView.frame.size.width);
//Set the content size of our scrollview according to the total width of our imageView objects.
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * [subviewArray count], self.scrollView.frame.size.height);
}
問題是當我打印“self.scrollView.frame.size.width”的值時,我得到“0”! 任何幫助PLZ !!!
修復它,我不得不在文件檢查器中取消選中“使用AutoLayout”。 非常感謝Wain! 希望這可以幫助其他人。 祝好運 !
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