按钮 Layer
UIButton*button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame=CGRectMake(100,250,60,60);// 40px square
button.layer.cornerRadius=30.0;// half height & width
button.layer.borderWidth=3.0;
button.layer.borderColor= [UIColorblackColor].CGColor;
button.backgroundColor= [UIColorredColor];
[button setTitle:@"渐变"forState:UIControlStateNormal];
button.titleLabel.font= [UIFont boldSystemFontOfSize:22];
[button setTitleColor:[UIColor blackColor]forState:UIControlStateNormal];
[self.view addSubview:button];
渐变色
CAGradientLayer*layer = [CAGradientLayer layer];
NSArray*colors = [NSArrayarrayWithObjects: (id)[UIColor whiteColor].CGColor, (id)[UIColorredColor].CGColor, nil];
[layer setColors:colors];
[layer setFrame:button.bounds];
// layer.shadowPath = [UIBezierPath bezierPathWithRect:layer.bounds].CGPath;
//!!!!!!!important
[button.layer insertSublayer:layeratIndex:0];
button.clipsToBounds=YES;// Important!
加阴影
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100,400,60,60)];
[self.view addSubview:myView];
myView.layer.borderWidth=2.0;
myView.layer.borderColor = [UIColor redColor].CGColor;
myView.layer.shadowColor = [UIColor darkGrayColor].CGColor;
myView.layer.shadowOpacity=1.0;
myView.layer.shadowOffset = CGSizeMake(2.0,2.0);
// myView.layer.shadowPath = [UIBezierPath bezierPathWithRect:layer.bounds].CGPath;
// myView.layer.shadowOffset = CGSizeMake(-2.0, 2.0);
