iPhone 應用裡實現截圖功能的程式碼
阿新 • • 發佈：2019-01-09
UIView *view = [[[[[UIApplication sharedApplication] windows] objectAtIndex:1] subviews] lastObject];//獲得某個window的某個subView
NSInteger index = 0;//用來給儲存的png命名
for (UIView *subView in [view subviews]) {//遍歷這個view的subViews
if ([subView isKindOfClass:NSClassFromString(@"UIImageView")] || [subView isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {//找到自己需要的subView
//支援retina高分的關鍵
if(UIGraphicsBeginImageContextWithOptions != NULL)
{
UIGraphicsBeginImageContextWithOptions(subView.frame.size, NO, 0.0);
} else {
UIGraphicsBeginImageContext(subView.frame.size);
}
//獲取影象
[subView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//儲存影象
NSString *path = [NSHomeDirectory() stringByAppendingFormat:@"/%d.png",index];
if ([UIImagePNGRepresentation(image) writeToFile:path atomically:YES]) {
index += 1;
NSLog(@"Succeeded!");
}
else {
NSLog(@"Failed!");
}
}
}
NSInteger index = 0;//用來給儲存的png命名
for (UIView *subView in [view subviews]) {//遍歷這個view的subViews
if ([subView isKindOfClass:NSClassFromString(@"UIImageView")] || [subView isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {//找到自己需要的subView
//支援retina高分的關鍵
if(UIGraphicsBeginImageContextWithOptions != NULL)
{
UIGraphicsBeginImageContextWithOptions(subView.frame.size, NO, 0.0);
} else {
UIGraphicsBeginImageContext(subView.frame.size);
}
//獲取影象
[subView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//儲存影象
NSString *path = [NSHomeDirectory() stringByAppendingFormat:@"/%d.png",index];
if ([UIImagePNGRepresentation(image) writeToFile:path atomically:YES]) {
index += 1;
NSLog(@"Succeeded!");
}
else {
NSLog(@"Failed!");
}
}
}