圆角动画与圆角定制
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
view.backgroundColor = [UIColor redColor];
view.layer.cornerRadius = 20;
// 圆角定制
view.layer.maskedCorners = kCALayerMinXMaxYCorner | kCALayerMaxXMaxYCorner;
[self.view addSubview:view];
// 圆角动画
[UIView animateWithDuration:0.5 animations:^{
view.layer.cornerRadius = 0;
}];
NSMutableAttributedString crash
- (void)testAttributedStringInitCrash
{
NSString *nilStr = nil;
NSAttributedString *attributedStr = [[NSAttributedString alloc] initWithString:nilStr];
}
Crash Log ~~~ Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘NSConcreteAttributedString initWithString:: nil value’ ~~~
- (void)testMutableAttributedStringInitCrash
{
NSString *nilStr = nil;
NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc] initWithString:nilStr];
}
Crash Log ~~~ Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘NSConcreteMutableAttributedString initWithString:: nil value’ ~~~
- (void)testMutableAttributedStringAddAttributeCrash
{
NSString *nonnullStr = @"str";
NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc] initWithString:nonnullStr];
NSString *nilValue = nil;
[attributedStr addAttribute:NSAttachmentAttributeName value:nilValue range:NSMakeRange(0, 1)];
}
Crash Log ~~~ Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘NSConcreteMutableAttributedString addAttribute:value:range:: nil value’ ~~~