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ios-改变图片的尺寸
//改变图片的尺寸
-(UIImage*) OriginImage:(UIImage *)image scaleToSize:(CGSize)size
{
UIGraphicsBeginImageContext(size); //size 为CGSize类型，即你所需要的图片尺寸
[image drawInRect:CGRectMake(0, 0, size.width, size.height)];
UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImage *imagescaless= [self imageRetain:scaledImage];
return imagescaless; //返回的就是已经改变的图片
}
//对.2x图片进行处理
-(UIImage*)imageRetain:(UIImage *)sourceImage
{
CGSize size;
size = CGSizeMake(sourceImage.size.width / 2.0f, sourceImage.size.height / 2.0f);
UIGraphicsBeginImageContextWithOptions(size, NO, 0);
if (1.0 == [[UIScreen mainScreen] scale]){
[sourceImage drawInRect:CGRectIntegral((CGRect){0.0f, 0.0f, size})];
}else{
[sourceImage drawInRect:(CGRect){0.0f, 0.0f, size}];
sourceImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
return sourceImage;
}
下面是调用方法：
- (void)viewDidLoad
{
[super viewDidLoad];
_dataList=[[NSMutableArray alloc]initWithCapacity:10];
[self initViews];
NSArray *tmpArray1 = @[@"照片墙",@"讨论区",@"群组",@"通讯录"];
self.SXHAry = tmpArray1;
NSArray *tmpArray2 = @[@"晚报放心购",@"厦门房产动态",@"厦门车市动态"];
self.XMRBAry = tmpArray2;
NSArray *bFirsts = @[@"gc1.png",@"gc2.png",@"gc3.png",@"gc4.png"];
NSMutableArray *bFirst=[[NSMutableArray alloc]initWithCapacity:0];
for (int i=0; i<bFirsts.count; i++) {
UIImage*images=[UIImage imageNamed:[bFirsts objectAtIndex:i]];
UIImage *imagenew=[self OriginImage:images scaleToSize:CGSizeMake(45, 45)];
[bFirst addObject:imagenew];
}
self.bFirstAry = [bFirst copy];
NSArray *bSecconds = @[@"gc6.png",@"gc7.png",@"gc8.png"];
NSMutableArray *bSecond=[[NSMutableArray alloc]initWithCapacity:0];
for (int i=0; i<bSecconds.count; i++) {
UIImage*images=[UIImage imageNamed:[bSecconds objectAtIndex:i]];
UIImage *imagenew=[self OriginImage:images scaleToSize:CGSizeMake(45, 45)];
[bSecond addObject:imagenew];
}
self.bSecondAry = [bSecond copy];
NSArray *rFirsts = @[@"gc1.png",@"gc2.png",@"gc3.png",@"gc4.png"];
NSMutableArray *rFirst=[[NSMutableArray alloc]initWithCapacity:0];
for (int i=0; i<rFirsts.count; i++) {
UIImage*images=[UIImage imageNamed:[rFirsts objectAtIndex:i]];
UIImage *imagenew=[self OriginImage:images scaleToSize:CGSizeMake(45, 45)];
[rFirst addObject:imagenew];
}
self.rFirstAry = [rFirst copy];
NSArray *rSeconds = @[@"gc6.png",@"gc7.png",@"gc8.png"];
NSMutableArray *rSecond=[[NSMutableArray alloc]initWithCapacity:0];
for (int i=0; i<rSeconds.count; i++) {
UIImage*images=[UIImage imageNamed:[rSeconds objectAtIndex:i]];
UIImage *imagenew=[self OriginImage:images scaleToSize:CGSizeMake(45, 45)];
[rSecond addObject:imagenew];
}
self.rSecondtAry = [rSecond copy];
[self setExtraCellLineHidden:self.squareTableCell];
}
ios-改变图片的尺寸