iOS:使图像宽度略小于屏幕宽度

Question

我遇到了图像太大的问题。我需要它略小于屏幕宽度。

这是我的 Controller :

- (void)viewDidLoad {
    [super viewDidLoad];

    self.imageName = @"goldencoaster";

    [self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"table"]]];

    UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%@", self.imageName]];
    CGRect bounds;
    bounds.origin = CGPointZero;
    bounds.size = [[UIScreen mainScreen] bounds].size;

    self.coasterImage.bounds = bounds;
    self.coasterImage.image = image;
}

但是，当我运行模拟器时，这会返回:

如何让图片显示得比屏幕宽度略小？

============================================= ===================== 更新

所以我按照建议取出了自动布局，并将我的 Controller 更新为如下所示:

- (void)viewDidLoad {
    [super viewDidLoad];

    self.imageName = @"goldencoaster";

    [self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"table"]]];

    UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%@", self.imageName]];

    CGRect screen = [[UIScreen mainScreen] bounds];

    CGRect bounds;
    bounds.origin.x = screen.origin.x + 10;
    bounds.origin.y = screen.origin.y + 10;
    bounds.size.width = screen.size.width - 100;

    self.coasterImage.frame = bounds;
    self.coasterImage.image = image;
}

但是，现在我的图像根本不显示了？？仅显示背景(名称为“table”的图像)，但不显示 goldencoaster。

Answer 1

试试这个

- (void)viewDidLoad {
[super viewDidLoad];

self.imageName = @"goldencoaster";

[self.view setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"table"]]];

UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%@", self.imageName]];
CGRect bounds;
bounds.origin = CGPointZero;
bounds.size = [[UIScreen mainScreen] bounds].size;

self.coasterImage.bounds = bounds;
self.coasterImage.image = image;
self.coasterImage.frame = CGRectMake(20, 0,   self.view.frame.size.width-40, self.view.frame.size.height);
self.coasterImage.center = self.coasterImage.superview.center;

}

swift 3.1

override func viewDidLoad() {
    super.viewDidLoad()

    imageName = "goldencoaster"

    view.backgroundColor = UIColor(patternImage: UIImage(named: "table")!)

    let image = UIImage(named: imageName)
    var bounds = CGRect()
    bounds.origin = CGPoint.zero
    bounds.size = (UIScreen.main.bounds).size

    coasterImage.bounds = bounds
    coasterImage.image = image
    coasterImage.frame = CGRect(x: CGFloat(20), y: 0, width: self.view.frame.size.width - CGFloat(40), height: self.view.frame.size.height)
    coasterImage.center = (coasterImage.superview?.center)!
}