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嗨我想繪製一些.png圖像存儲在沙箱和輸出文本在UIView。我的代碼是:試圖在UIView中繪製
-(void)setItemDetails:(ItemShow *)itmShow
{
if(theItem!=itmShow)
{
[theItem release];
theItem=itmShow;
[theItem retain];
}
UIImage *rImage=[UIImage imageNamed:@"years"];
[[UIColor blackColor] set];
[rImage drawInRect:CGRectMake(55.0, 22.0, 17.0, 17.0)];
[[UIColor brownColor] set];
[theItem.itemYear drawAtPoint:CGPointMake(7.0,19.0)
forWidth:100
withFont:[UIFont systemFontOfSize:17.0]
minFontSize:17.0
actualFontSize:NULL
lineBreakMode:UILineBreakModeTailTruncation
baselineAdjustment:UIBaselineAdjustmentAlignBaselines];
}
那我在viewDidLoad中調用此方法後。什麼都沒發生。我無法在UIView的畫布上看到任何圖像和文字。這裏有什麼問題?
坦率地說,我試圖在UIViewController中繪製。我試過你的代碼: - (void)drawRect:(CGRect)rect CGContextRef myContext = UIGraphicsGetCurrentContext(); UIImage * rImage = [UIImage imageNamed:@「years」]; CGRect imageRect = CGRectMake(10,10,300,400); [rImage drawInRect:imageRect]; [rImage release]; 但它沒有畫任何東西。 – NCFUSN 2012-01-30 00:34:37
@Nathan唯一用於在屏幕上繪圖的地方是UIView。如果你把drawRect放在UIViewController中,它將保持「死代碼」:方法不會被調用。您需要繼承UIView並覆蓋它的drawRect,創建該UIView的一個實例,並將該實例賦值給UIViewController的'self.view'。 – dasblinkenlight 2012-01-30 00:46:02
好的。我會試試看。謝謝。 – NCFUSN 2012-01-30 00:50:07