ios - 颜色问题外的惊人圆角半径

这是我添加到新 View Controller 的代码:

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, 200, 100)];
    [contentView setClipsToBounds:YES];
    [contentView setBackgroundColor:[UIColor blueColor]];
    [self.view addSubview:contentView];

    [[contentView layer] setBorderColor:[[UIColor lightGrayColor] CGColor]];
    [[contentView layer] setBorderWidth:1.0f];
    [[contentView layer] setCornerRadius:5.0f];
    [[contentView layer] setMasksToBounds:YES];
} 

结果:

如果看角落，我们可以看到外面的蓝色像素:

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Best Answer-推荐答案

您可以使用 CAShapeLayer :

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, 200, 100)];
    [self.view addSubview:contentView];

    CAShapeLayer *subLayer = [[CAShapeLayer alloc] init];
    [subLayer setFillColor:[UIColor blueColor].CGColor];
    [subLayer setStrokeColor:[UIColor grayColor].CGColor];
    [subLayer setLineWidth:6.0];
    [subLayer setPath:[UIBezierPath bezierPathWithRoundedRect:contentView.bounds cornerRadius:5.0].CGPath];

    [contentView.layer addSublayer:subLayer];
}

关于ios - 颜色问题外的惊人圆角半径，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29213208/