这是我书中的代码。这并不完全是您想要做的,但它展示了这项技术并将帮助您入门!请注意,我使用的是 79 x 27(不确定您的号码是从哪里得到的):
UIGraphicsBeginImageContextWithOptions(CGSizeMake(79,27), NO, 0);
[[UIColor blackColor] setFill];
UIBezierPath* p = [UIBezierPath bezierPathWithRect:CGRectMake(0,0,79,27)];
[p fill];
NSMutableParagraphStyle* para = [NSMutableParagraphStyle new];
para.alignment = NSTextAlignmentCenter;
NSAttributedString* att =
[[NSAttributedString alloc] initWithString:@"YES" attributes:
@{
NSFontAttributeName:[UIFont fontWithName:@"GillSans-Bold" size:16],
NSForegroundColorAttributeName:[UIColor whiteColor],
NSParagraphStyleAttributeName:para
}];
[att drawInRect:CGRectMake(0,5,79,22)];
UIImage* im = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.sw2.onImage = im;
看起来像这样:
