看標題還不知道要做什麼，那麼就直接來寫程式！
其實一張圖多顏色 (One Image Multi Color)，就是想要只提供一張圖片，就能呈現多樣顏色，這有什麼好處？就不用設計師出許多不同顏色的圖囉！
原本給的圖是土色，圖案上還有些許木頭紋路，我們來嘗試改變它的Tint Color～
初始化ImageView，設定Image的UIImageRenderingMode為UIImageRenderingModeAlwaysTemplate。
/**
Theme: One Image Multi Color
IDE: Xcode 12
Language: Objective C
Date: 109/10/15
Author: HappyMan
Blog: https://cg2010studio.com/
*/
- (void)testImage {
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"happy day"]];
imageView.tintColor = [UIColor blackColor];
[self.view addSubview:imageView];
imageView.center = CGPointMake(200, 100);
UIImageView *imageView2 = [[UIImageView alloc] initWithImage:[[UIImage imageNamed:@"happy day"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
imageView2.tintColor = [UIColor blackColor];
[self.view addSubview:imageView2];
imageView2.center = CGPointMake(200, 300);
UIImageView *imageView3 = [[UIImageView alloc] initWithImage:[[UIImage imageNamed:@"happy day"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
imageView3.tintColor = [UIColor greenColor];
[self.view addSubview:imageView3];
imageView3.center = CGPointMake(200, 500);
}
呈現在螢幕上如是～看起來紋路不見了呢！
201124更新
若只想在UIImage上做處理，可以使用⋯⋯
/**
Theme: One Image Multi Color
IDE: Xcode 12
Language: Objective C
Date: 109/11/24
Author: HappyMan
Blog: https://cg2010studio.com/
*/
- (void)testImage2 {
// Create a graphics image context
UIGraphicsBeginImageContext(newSize);
image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIColor *color = [UIColor redColor];
[color setFill];
// Tell the old image to draw in this new context, with the desired
// new size
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
// Get the new image from the context
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
// End the context
UIGraphicsEndImageContext();
}
原圖
上色圖
參考：單一色系圖片，直接用程式改變圖片的顏色 imageWithRenderingMode、How can I change image tintColor in iOS and WatchKit。
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